update

2024-11-21 19:55:17 -05:00 · 2020-12-22 18:30:00 +01:00 · 2020-12-22 18:30:00 +01:00 · 573107a3d0
commit 573107a3d0
parent c4326e2281
61 changed files with 949 additions and 220 deletions
--- a/WinRelease/hsmodem.exe
+++ b/WinRelease/hsmodem.exe
--- a/WinRelease/hsmodem.iobj
+++ b/WinRelease/hsmodem.iobj
--- a/WinRelease/hsmodem.ipdb
+++ b/WinRelease/hsmodem.ipdb
--- a/WinRelease/hsmodem.pdb
+++ b/WinRelease/hsmodem.pdb
--- a/WinRelease/oscardata.exe
+++ b/WinRelease/oscardata.exe
--- a/hsmodem/Makefile
+++ b/hsmodem/Makefile
@ -9,7 +9,7 @@

 CXXFLAGS = -Wall -O3 -std=c++0x -Wno-write-strings -Wno-narrowing
 LDFLAGS = -lpthread -lrt -lsndfile -lasound -lm -lopus -lfftw3 -lfftw3_threads -lliquid -lcodec2 -lsoundio
-OBJ = hsmodem.o constellation.o crc16.o frame_packer.o main_helper.o scrambler.o speed.o fec.o udp.o fft.o liquid_if.o symboltracker.o voiceprocessor.o codec2.o soundio.o fifo.o announcement.o fifo_voice.o voiceio.o tuning.o
+OBJ = hsmodem.o constellation.o crc16.o frame_packer.o main_helper.o scrambler.o speed.o fec.o udp.o fft.o liquid_if.o symboltracker.o voiceprocessor.o codec2.o soundio.o fifo.o announcement.o fifo_voice.o voiceio.o tuning.o rtty.o

 default: $(OBJ)
 	mkdir -p ../hsmodemLinux
--- a/hsmodem/Release/announcement.obj
+++ b/hsmodem/Release/announcement.obj
--- a/hsmodem/Release/codec2.obj
+++ b/hsmodem/Release/codec2.obj
--- a/hsmodem/Release/constellation.obj
+++ b/hsmodem/Release/constellation.obj
--- a/hsmodem/Release/crc16.obj
+++ b/hsmodem/Release/crc16.obj
--- a/hsmodem/Release/fec.obj
+++ b/hsmodem/Release/fec.obj
--- a/hsmodem/Release/fft.obj
+++ b/hsmodem/Release/fft.obj
--- a/hsmodem/Release/fifo.obj
+++ b/hsmodem/Release/fifo.obj
--- a/hsmodem/Release/fifo_voice.obj
+++ b/hsmodem/Release/fifo_voice.obj
--- a/hsmodem/Release/frame_packer.obj
+++ b/hsmodem/Release/frame_packer.obj
--- a/hsmodem/Release/hsmodem.Build.CppClean.log
+++ b/hsmodem/Release/hsmodem.Build.CppClean.log
@ -1,32 +0,0 @@
-e:\funk\hsmodem\hsmodem\release\vc140.pdb
-e:\funk\hsmodem\hsmodem\release\tuning.obj
-e:\funk\hsmodem\hsmodem\release\liquid_if.obj
-e:\funk\hsmodem\hsmodem\release\fft.obj
-e:\funk\hsmodem\hsmodem\release\voiceprocessor.obj
-e:\funk\hsmodem\hsmodem\release\voiceio.obj
-e:\funk\hsmodem\hsmodem\release\udp.obj
-e:\funk\hsmodem\hsmodem\release\symboltracker.obj
-e:\funk\hsmodem\hsmodem\release\speed.obj
-e:\funk\hsmodem\hsmodem\release\soundio.obj
-e:\funk\hsmodem\hsmodem\release\scrambler.obj
-e:\funk\hsmodem\hsmodem\release\main_helper.obj
-e:\funk\hsmodem\hsmodem\release\hsmodem.obj
-e:\funk\hsmodem\hsmodem\release\frame_packer.obj
-e:\funk\hsmodem\hsmodem\release\fifo_voice.obj
-e:\funk\hsmodem\hsmodem\release\fifo.obj
-e:\funk\hsmodem\hsmodem\release\fec.obj
-e:\funk\hsmodem\hsmodem\release\crc16.obj
-e:\funk\hsmodem\hsmodem\release\constellation.obj
-e:\funk\hsmodem\hsmodem\release\codec2.obj
-e:\funk\hsmodem\hsmodem\release\announcement.obj
-e:\funk\hsmodem\winrelease\hsmodem.exe
-e:\funk\hsmodem\winrelease\hsmodem.ipdb
-e:\funk\hsmodem\winrelease\hsmodem.iobj
-e:\funk\hsmodem\winrelease\hsmodem.pdb
-e:\funk\hsmodem\hsmodem\..\winrelease\hsmodem.exe
-e:\funk\hsmodem\hsmodem\release\hsmodem.tlog\cl.command.1.tlog
-e:\funk\hsmodem\hsmodem\release\hsmodem.tlog\cl.read.1.tlog
-e:\funk\hsmodem\hsmodem\release\hsmodem.tlog\cl.write.1.tlog
-e:\funk\hsmodem\hsmodem\release\hsmodem.tlog\link.command.1.tlog
-e:\funk\hsmodem\hsmodem\release\hsmodem.tlog\link.read.1.tlog
-e:\funk\hsmodem\hsmodem\release\hsmodem.tlog\link.write.1.tlog
--- a/hsmodem/Release/hsmodem.log
+++ b/hsmodem/Release/hsmodem.log
@ -1,24 +0,0 @@
-  announcement.cpp
-  codec2.cpp
-  constellation.cpp
-  crc16.cpp
-  fec.cpp
-  fft.cpp
-  fifo.cpp
-  fifo_voice.cpp
-  frame_packer.cpp
-  hsmodem.cpp
-  liquid_if.cpp
-  main_helper.cpp
-  scrambler.cpp
-  soundio.cpp
-  speed.cpp
-  symboltracker.cpp
-  tuning.cpp
-  udp.cpp
-  voiceio.cpp
-  voiceprocessor.cpp
-  Code wird generiert.
-  All 602 functions were compiled because no usable IPDB/IOBJ from previous compilation was found.
-  Codegenerierung ist abgeschlossen.
-  hsmodem.vcxproj -> E:\funk\hsmodem\hsmodem\..\WinRelease\hsmodem.exe
--- a/hsmodem/Release/hsmodem.obj
+++ b/hsmodem/Release/hsmodem.obj
--- a/hsmodem/Release/hsmodem.tlog/CL.command.1.tlog
+++ b/hsmodem/Release/hsmodem.tlog/CL.command.1.tlog
--- a/hsmodem/Release/hsmodem.tlog/CL.read.1.tlog
+++ b/hsmodem/Release/hsmodem.tlog/CL.read.1.tlog
--- a/hsmodem/Release/hsmodem.tlog/CL.write.1.tlog
+++ b/hsmodem/Release/hsmodem.tlog/CL.write.1.tlog
--- a/hsmodem/Release/hsmodem.tlog/hsmodem.lastbuildstate
+++ b/hsmodem/Release/hsmodem.tlog/hsmodem.lastbuildstate
@ -1,2 +0,0 @@
-#TargetFrameworkVersion=v4.0:PlatformToolSet=v140_xp:EnableManagedIncrementalBuild=false:VCToolArchitecture=Native32Bit:WindowsTargetPlatformVersion=8.1
-Release|Win32|E:\funk\hsmodem\|
--- a/hsmodem/Release/hsmodem.tlog/link.command.1.tlog
+++ b/hsmodem/Release/hsmodem.tlog/link.command.1.tlog
--- a/hsmodem/Release/hsmodem.tlog/link.read.1.tlog
+++ b/hsmodem/Release/hsmodem.tlog/link.read.1.tlog
--- a/hsmodem/Release/hsmodem.tlog/link.write.1.tlog
+++ b/hsmodem/Release/hsmodem.tlog/link.write.1.tlog
--- a/hsmodem/Release/hsmodem.vcxproj.FileListAbsolute.txt
+++ b/hsmodem/Release/hsmodem.vcxproj.FileListAbsolute.txt
--- a/hsmodem/Release/liquid_if.obj
+++ b/hsmodem/Release/liquid_if.obj
--- a/hsmodem/Release/main_helper.obj
+++ b/hsmodem/Release/main_helper.obj
--- a/hsmodem/Release/scrambler.obj
+++ b/hsmodem/Release/scrambler.obj
--- a/hsmodem/Release/soundio.obj
+++ b/hsmodem/Release/soundio.obj
--- a/hsmodem/Release/speed.obj
+++ b/hsmodem/Release/speed.obj
--- a/hsmodem/Release/symboltracker.obj
+++ b/hsmodem/Release/symboltracker.obj
--- a/hsmodem/Release/tuning.obj
+++ b/hsmodem/Release/tuning.obj
--- a/hsmodem/Release/udp.obj
+++ b/hsmodem/Release/udp.obj
--- a/hsmodem/Release/vc140.pdb
+++ b/hsmodem/Release/vc140.pdb
--- a/hsmodem/Release/voiceio.obj
+++ b/hsmodem/Release/voiceio.obj
--- a/hsmodem/Release/voiceprocessor.obj
+++ b/hsmodem/Release/voiceprocessor.obj
--- a/hsmodem/fft.cpp
+++ b/hsmodem/fft.cpp
@ -153,8 +153,8 @@ uint16_t *make_waterfall(float fre, int *retlen)
 }

 // smooth fft output
-const int smoothX = 6; // must be an even number !
-const int smoothY = 3;
+const int smoothX = 2; // must be an even number !
+const int smoothY = 10;
 int yidx = 0;

 uint16_t* mean(uint16_t* f)
@ -164,7 +164,7 @@ uint16_t* mean(uint16_t* f)

    if (tuning)
        return f;
-
+    
    // first smooth X values
    for (int x = 0; x < smoothX / 2; x++)
        fa[x] = f[x];
@ -179,8 +179,9 @@ uint16_t* mean(uint16_t* f)

    for (int x = fftcount - smoothX / 2; x < fftcount; x++)
        fa[x] = f[x];
-
+    
    // smooth Y values
+    
    static uint16_t yarr[smoothY][FFT_AUDIOSAMPLERATE / 2 + 1];
    for (int i = 0; i < fftcount; i++)
        yarr[yidx][i] = fa[i];
@ -194,10 +195,6 @@ uint16_t* mean(uint16_t* f)
        fa[i] /= smoothY;
    }

-    // do not smooth 2950 to 3050 Hz
-    for (int i = 295; i < 305; i++)
-        fa[i] = f[i];
-
    return fa;
 }

@ -216,7 +213,7 @@ void _init_fft()
    // decimate 44.1k or 48k down to 8000Hz
    // the FFT rate is 800, but we feed it with 8000 Samplerate
    // this results in a new fft every 100ms with a resolution of 10 Hz
-    float ratio = 10.0f * (float)FFT_AUDIOSAMPLERATE / (float)physcaprate;
+    float ratio = 10.0f * (float)FFT_AUDIOSAMPLERATE / (float)physRXcaprate;
    fftdecim = msresamp_crcf_create(ratio, 40.0f);

 }
--- a/hsmodem/hsmodem.cpp
+++ b/hsmodem/hsmodem.cpp
@ -68,7 +68,7 @@ int trigger_resetmodem = 0;
 char homepath[1000] = { 0 };

 int caprate = 44100;
-int physcaprate = 44100;
+int physRXcaprate = 44100;
 int txinterpolfactor = 20;
 int rxPreInterpolfactor = 5;
 int linespeed = 4410;
@ -87,7 +87,7 @@ int announcement = 0;
 int VoiceAudioMode = VOICEMODE_OFF;
 int codec = 1;  // 0=opus, 1=codec2
 int tuning = 0;
-int marker = 0;
+int marker = 1;

 int init_audio_result = 0;
 int init_voice_result = 0;
@ -382,6 +382,8 @@ void bc_rxdata(uint8_t* pdata, int len, struct sockaddr_in* rxsock)
        char rxip[20];
        strcpy(rxip, inet_ntoa(rxsock->sin_addr));

+        //printf("GUI search received:%s\n",rxip);
+
        if (fixappIP == 0)
        {
            if (strcmp(appIP, rxip))
@ -391,13 +393,14 @@ void bc_rxdata(uint8_t* pdata, int len, struct sockaddr_in* rxsock)
                    // there was an appIP already
                    // before accepting this new one, wait 3 seconds
                    int ts = (int)(actms - lastms);
-                    printf("new app IP: %s since %d, restarting modems\n", rxip,ts);
+                    //printf("new app IP: %s since %d, restarting modems\n", rxip,ts);
                    if (ts < 3000)
                        return;
                }
-                printf("first app IP: %s, restarting modems\n", rxip);
+                //printf("first app IP: %s, restarting modems\n", rxip);
                restart_modems = 1;
            }
+
            strcpy(appIP, rxip);
            //printf("app (%s) is searching modem. Sending modem IP to the app\n",appIP);
            // App searches for the modem IP, mirror the received messages
@ -569,8 +572,7 @@ void appdata_rxdata(uint8_t* pdata, int len, struct sockaddr_in* rxsock)
    if (type == 27)
    {
        // send Tuning tones
-        printf("Tuning mode active\n");
-        VoiceAudioMode = VOICEMODE_OFF;
+        printf("Tuning mode active:%d\n",minfo);
        tuning_runtime = 0;
        tuning = minfo;
        return;
@ -583,6 +585,15 @@ void appdata_rxdata(uint8_t* pdata, int len, struct sockaddr_in* rxsock)
        return;
    }

+    if (type == 29)
+    {
+        int v = minfo;
+        if (v > 128) 
+            v = v - 255;
+        modifyRXfreq(float(v));
+        return;
+    }
+
    // here we are with payload data to be sent via the modulator

    if (len != (PAYLOADLEN + 2))
--- a/hsmodem/hsmodem.h
+++ b/hsmodem/hsmodem.h
@ -206,6 +206,10 @@ void io_clear_voice_fifos();
 float do_tuning(int send);
 void init_tune();
 float singleFrequency();
+void rtty_tx();
+int rtty_rx();
+void modifyRXfreq(float fr);
+void showbytestring16(char* title, uint16_t* data, int anz);


 extern int speedmode;
@ -240,7 +244,7 @@ extern int rxlevel_deteced;
 extern int rx_in_sync;
 extern float softwareMICvolume;
 extern float softwareLSvolume;
-extern int physcaprate;
+extern int physRXcaprate;
 extern int restart_modems;
 extern int safemode;
 extern char homepath[];
--- a/hsmodem/hsmodem.vcxproj
+++ b/hsmodem/hsmodem.vcxproj
@ -251,6 +251,7 @@
    <ClCompile Include="hsmodem.cpp" />
    <ClCompile Include="liquid_if.cpp" />
    <ClCompile Include="main_helper.cpp" />
+    <ClCompile Include="rtty.cpp" />
    <ClCompile Include="scrambler.cpp" />
    <ClCompile Include="soundio.cpp" />
    <ClCompile Include="speed.cpp" />
--- a/hsmodem/hsmodem.vcxproj.filters
+++ b/hsmodem/hsmodem.vcxproj.filters
@ -75,6 +75,9 @@
    <ClCompile Include="tuning.cpp">
      <Filter>Source Files</Filter>
    </ClCompile>
+    <ClCompile Include="rtty.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
  </ItemGroup>
  <ItemGroup>
    <ClInclude Include="hsmodem.h">
--- a/hsmodem/liquid_if.cpp
+++ b/hsmodem/liquid_if.cpp
@ -209,7 +209,7 @@ void modulator(uint8_t sym_in)
        }

        if(marker)
-            usb += singleFrequency() / 10.0f;
+            usb += singleFrequency() / 4.0f;

        io_pb_write_fifo(usb * 0.2f); // reduce volume and send to soundcard
    }
@ -221,6 +221,7 @@ nco_crcf dnnco = NULL;
 symtrack_cccf symtrack = NULL;
 firdecim_crcf decim = NULL;
 msresamp_crcf adecim = NULL;
+msresamp_crcf lsresamp = NULL;

 // decimator parameters
 unsigned int m_predec = 8;  // filter delay
@ -240,16 +241,27 @@ float        bandwidth_st   = 0.9f;  // loop filter bandwidth
 uint8_t maxLevel = 0;   // maximum RXlevel over the last x samples in %
 uint8_t maxTXLevel = 0; // maximum TXlevel over the last x samples in %

+float radians_per_sample = ((2.0f * (float)M_PI * (float)FREQUENCY) / (float)caprate);
+float last_radians_per_sample = 0;
+float actfrequency = (float)FREQUENCY;
+
+void modifyRXfreq(float diff_Hz)
+{
+    actfrequency += diff_Hz;
+    printf("set:%f Hz\n", actfrequency);
+    radians_per_sample = ((2.0f * (float)M_PI * actfrequency) / (float)caprate);
+}
+
 void init_demodulator()
 {
    printf("init RX demodulator\n");
    
    // downmixer oscillator
-    float RADIANS_PER_SAMPLE   = ((2.0f*(float)M_PI*(float)FREQUENCY)/(float)caprate);
+    radians_per_sample = ((2.0f*(float)M_PI*(float)FREQUENCY)/(float)caprate);
    
    dnnco = nco_crcf_create(LIQUID_NCO);
    nco_crcf_set_phase(dnnco, 0.0f);
-    nco_crcf_set_frequency(dnnco, RADIANS_PER_SAMPLE);
+    nco_crcf_set_frequency(dnnco, radians_per_sample);
    
    // create pre-decimator
    decim = firdecim_crcf_create_kaiser(rxPreInterpolfactor, m_predec, As_predec);
@ -259,6 +271,8 @@ void init_demodulator()
    // if Audio SR is 48000 but caprate is 44100
    r_OutDivInRatio = (float)((float)caprate / 48000.0);
    adecim = msresamp_crcf_create(r_OutDivInRatio, As_adecim);
+
+    lsresamp = msresamp_crcf_create((float)(48000.0/44100.0), As_adecim);
    
    // create symbol tracking synchronizer
    km_symtrack_cccf_create(ftype_st, k_st, m_st, beta_st, getMod());
@ -268,10 +282,15 @@ void init_demodulator()
 void close_demodulator()
 {
    if(decim != NULL) firdecim_crcf_destroy(decim);
-    if(adecim) msresamp_crcf_destroy(adecim);
-    symtrack = NULL;
    decim = NULL;
+    if(adecim) msresamp_crcf_destroy(adecim);
    adecim = NULL;
+    if (lsresamp) msresamp_crcf_destroy(lsresamp);
+    lsresamp = NULL;
+    if (symtrack != NULL) symtrack_cccf_destroy(symtrack);
+    symtrack = NULL;
+    if (dnnco != NULL) nco_crcf_destroy(dnnco);
+    dnnco = NULL;
 }

 void resetModem()
@ -288,6 +307,33 @@ void make_FFTdata(float f)
    uint16_t* fft = make_waterfall(f, &fftlen);
    if (fft != NULL)
    {
+        // fft data are in fft[] size: 0..fftlen
+        // 10 Hz per value
+        float fdiff = (float)FREQUENCY - actfrequency;
+        // shift spectrum if we are off 1500 Hz
+        int diff10Hz = (int)(fdiff / 10.0);
+        if (diff10Hz != 0)
+        {
+            //printf("%d %f %f %d\n", FREQUENCY, actfrequency, fdiff, diff10Hz);
+            if (diff10Hz < 0)
+            {
+                diff10Hz = -diff10Hz;
+                for (int i = 0; i < (fftlen-diff10Hz); i++)
+                    fft[i] = fft[i + diff10Hz];
+
+                for (int i = (fftlen - diff10Hz); i < fftlen; i++)
+                    fft[i] = 0;
+            }
+            else
+            {
+                for (int i = fftlen-1; i >= diff10Hz; i--)
+                    fft[i] = fft[i - diff10Hz];
+                
+                for (int i = 0; i < diff10Hz; i++)
+                    fft[i] = 0;
+            }
+        }
+
        uint8_t txpl[10000];
        if (fftlen > (10000 * 2 + 1))
        {
@ -367,7 +413,29 @@ static int const_idx = 0;
    if(ret == 0) return 0;

    if (VoiceAudioMode == VOICEMODE_LISTENAUDIOIN)
-        io_ls_write_fifo(f);
+    {
+        if (physRXcaprate == 44100)
+        {
+            // Loudspeaker Audio "ls" works only with 48k
+            // so we have to resample 44k1 to 48k
+            unsigned int num_written = 0;
+            liquid_float_complex in;
+            liquid_float_complex out[100];
+            in.real = f;
+            in.imag = 0;
+            msresamp_crcf_execute(lsresamp, &in, 1, out, &num_written);
+            if (num_written != 0)
+            {
+                for (unsigned int i = 0; i < num_written; i++)
+                {
+                    float fout = out[i].real;
+                    io_ls_write_fifo(fout);
+                }
+            }
+        }
+        else
+            io_ls_write_fifo(f);
+    }

    // input volume
    f *= softwareCAPvolume;
@ -375,7 +443,7 @@ static int const_idx = 0;
    getMax(f);
    make_FFTdata(f * 100);

-    if (caprate == 44100 && physcaprate == 48000)
+    if (caprate == 44100 && physRXcaprate == 48000)
    {
        // the sound card capture for a VAC always works with 48000 because
        // a VAC cannot be set to a specific cap rate in shared mode
@ -389,7 +457,15 @@ static int const_idx = 0;
        if (num_written == 0) return 1;
        f = out.real;
    }
-    
+
+    // if user changed frequency
+    if (radians_per_sample != last_radians_per_sample)
+    {
+        //printf("new QRG. Rad:%f\n", radians_per_sample);
+        nco_crcf_set_frequency(dnnco, radians_per_sample);
+        last_radians_per_sample = radians_per_sample;
+    }
+
    // downconvert 1,5kHz into baseband, still at soundcard sample rate
    nco_crcf_step(dnnco);
    
--- a/hsmodem/rtty.cpp
+++ b/hsmodem/rtty.cpp
@ -0,0 +1,262 @@
+/*
+* High Speed modem to transfer data in a 2,7kHz SSB channel
+* =========================================================
+* Author: DJ0ABR
+*
+*   (c) DJ0ABR
+*   www.dj0abr.de
+*
+*   This program is free software; you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation; either version 2 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with this program; if not, write to the Free Software
+*   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*
+* 
+*  RTTY:
+*  =====
+*  bit/symbol: 1
+*  BW: 170 Hz 
+*  carrier: 1500 Hz
+*  speed: 45.45 bits/s
+*  samples/symbol: 33
+*/
+
+#include "hsmodem.h"
+
+#define rtty_CENTERFREQUENCY  1500            
+
+fskmod rtty_mod = NULL;
+fskdem rtty_dem = NULL;
+
+unsigned int rtty_m = 1;	// bits/symbol
+const unsigned int rtty_k = 33;	// samples/symbol (periods of the 1500 Hz Carrier in one symbol)
+float rtty_bandwith = (170.0f/2)/ (float)rtty_CENTERFREQUENCY;	// 170 Hz spacing normalized to 1500 Hz
+
+firinterp_crcf rtty_TX_interpolator = NULL;
+unsigned int rtty_k_SampPerSymb = 20;         // 44100 / (4410/2)
+unsigned int rtty_m_filterDelay_Symbols = 15;         // not too short for good filter
+float        rtty_beta_excessBW = 0.2f;      // filter excess bandwidth factor
+float        rtty_tau_FracSymbOffset = -0.2f;      // fractional symbol offset
+
+nco_crcf rtty_upnco = NULL;
+nco_crcf rtty_dnnco = NULL;
+
+firdecim_crcf rtty_decim = NULL;
+unsigned int rtty_m_predec = 8;  // filter delay
+float rtty_As_predec = 40.0f;    // stop-band att 
+
+void close_rtty();
+
+void init_rtty()
+{
+	close_rtty();
+
+	rtty_mod = fskmod_create(rtty_m, rtty_k, rtty_bandwith);
+    rtty_dem = fskdem_create(rtty_m, rtty_k, rtty_bandwith);
+
+    // TX: Interpolator Filter
+    rtty_k_SampPerSymb = caprate / rtty_CENTERFREQUENCY;
+
+    // compute delay
+    while (rtty_tau_FracSymbOffset < 0) rtty_tau_FracSymbOffset += 1.0f;  // ensure positive tau
+    float g = rtty_k_SampPerSymb * rtty_tau_FracSymbOffset;                 // number of samples offset
+    int ds = (int)floorf(g);               // additional symbol delay
+    float dt = (g - (float)ds);     // fractional sample offset
+    // force dt to be in [0.5,0.5]
+    if (dt > 0.5f)
+    {
+        dt -= 1.0f;
+        ds++;
+    }
+
+    // calculate filter coeffs
+    unsigned int h_len_NumFilterCoeefs = 2 * rtty_k_SampPerSymb * rtty_m_filterDelay_Symbols + 1;
+    float h[4000];
+    if (h_len_NumFilterCoeefs >= 4000)
+    {
+        printf("rtty h in h_len_NumFilterCoeefs too small, need %d\n", h_len_NumFilterCoeefs);
+        return;
+    }
+    liquid_firdes_prototype(LIQUID_FIRFILT_RRC,
+        rtty_k_SampPerSymb,
+        rtty_m_filterDelay_Symbols,
+        rtty_beta_excessBW,
+        dt,
+        h);
+    // create the filter
+    rtty_TX_interpolator = firinterp_crcf_create(rtty_k_SampPerSymb, h, h_len_NumFilterCoeefs);
+
+    // create NCO for upmixing to 1500 Hz
+    float rtty_RADIANS_PER_SAMPLE = ((2.0f * (float)M_PI * (float)rtty_CENTERFREQUENCY) / (float)caprate);
+    rtty_upnco = nco_crcf_create(LIQUID_NCO);
+    nco_crcf_set_phase(rtty_upnco, 0.0f);
+    nco_crcf_set_frequency(rtty_upnco, rtty_RADIANS_PER_SAMPLE);
+
+    rtty_dnnco = nco_crcf_create(LIQUID_NCO);
+    nco_crcf_set_phase(rtty_dnnco, 0.0f);
+    nco_crcf_set_frequency(rtty_dnnco, rtty_RADIANS_PER_SAMPLE);
+
+    rtty_decim = firdecim_crcf_create_kaiser(rtty_k_SampPerSymb, rtty_m_predec, rtty_As_predec);
+    firdecim_crcf_set_scale(rtty_decim, 1.0f / (float)rtty_k_SampPerSymb);
+}
+
+void close_rtty()
+{
+	if (rtty_mod != NULL) fskmod_destroy(rtty_mod);
+	rtty_mod = NULL;
+	if (rtty_TX_interpolator != NULL) firinterp_crcf_destroy(rtty_TX_interpolator);
+	rtty_TX_interpolator = NULL;
+    if (rtty_upnco != NULL) nco_crcf_destroy(rtty_upnco);
+    rtty_upnco = NULL;
+    if (rtty_dnnco != NULL) nco_crcf_destroy(rtty_dnnco);
+    rtty_dnnco = NULL;
+    if (rtty_decim != NULL) firdecim_crcf_destroy(rtty_decim);
+    rtty_decim = NULL;
+    if (rtty_dem != NULL) fskdem_destroy(rtty_dem);
+    rtty_dem = NULL;
+}
+
+char text[6] = {"ABCD\n"};
+int tidx = 0;
+int bitidx = 1;
+
+void rtty_tx()
+{
+    if (rtty_mod == NULL)
+        init_rtty();
+
+    unsigned int sym = (text[tidx] & bitidx) ? 1 : 0;
+    bitidx <<= 1;
+    if (bitidx == 0x0100)
+    {
+        bitidx = 1;
+        tidx++;
+        if (tidx == 6) tidx = 0;
+    }
+
+	liquid_float_complex rtty_txbuf[33+1];
+
+    // gets one symbol at a speed of 45.45
+	fskmod_modulate(rtty_mod, sym, rtty_txbuf);
+	// here we have the complex RTTY signal in baseband
+    // one symbol was expanded to rtty_k periods:
+    // 45.454545 * 33 = 1500 periods
+    
+    for (unsigned int i = 0; i < rtty_k; i++)
+    {
+        // resample it to the soundcard rate caprate
+        // interpolate by k_SampPerSymb
+        liquid_float_complex y[40];
+        if (rtty_k_SampPerSymb >= 40)
+        {
+            printf("y in k_SampPerSymb too small, need %d\n", rtty_k_SampPerSymb);
+            return;
+        }
+
+        firinterp_crcf_execute(rtty_TX_interpolator, rtty_txbuf[i], y);
+        // here we have rtty_k_SampPerSymb samples in y[] in the baseband at caprate
+        // speed 
+        
+        for (unsigned int i = 0; i < rtty_k_SampPerSymb; i++)
+        {
+            // move sample to 1,5kHz carrier
+            nco_crcf_step(rtty_upnco);
+
+            liquid_float_complex c;
+            nco_crcf_mix_up(rtty_upnco, y[i], &c);
+            float usb = c.real + c.imag;
+
+            // speed: 48000
+            // adapt speed to soundcard samplerate
+            int fs;
+            while (1)
+            {
+                fs = io_pb_fifo_freespace(0);
+                // wait until there is space in fifo
+                if (fs > 20000) break;
+                sleep_ms(10);
+            }
+
+            io_pb_write_fifo(usb * 0.2f); // reduce volume and send to soundcard
+        }
+    }
+}
+
+// RTTY: sample rate HAS TO BE 48000
+int rtty_rx()
+{
+    static liquid_float_complex ccol[500];
+    static unsigned int ccol_idx = 0;
+
+    if (rtty_dnnco == NULL) return 0;
+
+    // get one received sample
+    float f;
+    int ret = io_cap_read_fifo(&f);
+    if (ret == 0) return 0;
+
+    if (VoiceAudioMode == VOICEMODE_LISTENAUDIOIN)
+        io_ls_write_fifo(f);
+
+    // input volume
+    f *= softwareCAPvolume;
+
+    //getMax(f);
+    //make_FFTdata(f * 100);
+    
+    // downconvert 1,5kHz into baseband, still at soundcard sample rate
+    nco_crcf_step(rtty_dnnco);
+
+    liquid_float_complex in;
+    in.real = f;
+    in.imag = f;
+    liquid_float_complex c;
+    nco_crcf_mix_down(rtty_dnnco, in, &c);
+
+    // c is the actual sample, converted to complex and shifted to baseband
+
+    // this is the first decimator. We need to collect rtty_k_SampPerSymb number of samples
+    // then call execute which will give us one decimated sample
+    ccol[ccol_idx++] = c;
+    if (ccol_idx < rtty_k_SampPerSymb) return 1;
+    ccol_idx = 0;
+
+    // we have rtty_k_SampPerSymb samples in ccol
+    liquid_float_complex y;
+    firdecim_crcf_execute(rtty_decim, ccol, &y);
+    // the output of the pre decimator is exactly one sample in y
+    // ready for demodulation
+    // here we have 1500 samples/s
+    // collect rtty_k (33) samples then demodulate, 1500/33 = 45.45
+    static unsigned int cs = 0;
+    static liquid_float_complex camps[rtty_k];
+    camps[cs] = y;
+    if (++cs < rtty_k) return 1;
+    cs = 0;
+
+    //measure_speed_bps(1);
+
+    unsigned int sym_out = fskdem_demodulate(rtty_dem, camps);
+    
+    static int sym = 0;
+    static int symidx = 0;
+    sym |= sym_out << symidx;
+    symidx++;
+    if (symidx == 8)
+    {
+        symidx = 0;
+        printf("%d: %c\n", sym, sym);
+        sym = 0;
+    }
+
+    return 1;
+}
--- a/hsmodem/soundio.cpp
+++ b/hsmodem/soundio.cpp
@ -522,14 +522,14 @@ int io_init_sound(char *pbname, char *capname)
    {
        instream->format = SoundIoFormatS16NE;
        instream->sample_rate = caprate;
-        physcaprate = caprate;
+        physRXcaprate = caprate;
    }
    else 
    {
        // a VAC needs these settings or it will not work with 44100
        instream->format = SoundIoFormatFloat32NE;
        instream->sample_rate = AUDIO_SAMPRATE;
-        physcaprate = AUDIO_SAMPRATE;
+        physRXcaprate = AUDIO_SAMPRATE;
    }
    instream->software_latency = latenz;
    instream->read_callback = read_callback;
@ -548,7 +548,7 @@ int io_init_sound(char *pbname, char *capname)
    init_audio_result |= 2;

    printf("selected CAPTURE device:\nname:%s\nid  :%s\n", capname, capdevid);
-    printf("physical capture rate:%d, logical capture rate:%d\n", physcaprate, caprate);
+    printf("physical capture rate:%d, logical capture rate:%d\n", physRXcaprate, caprate);
    printf("format: %s\n\n", soundio_format_string(instream->format));

    // the CAP callback is running now
--- a/hsmodem/speed.cpp
+++ b/hsmodem/speed.cpp
@ -157,13 +157,12 @@ void measure_speed_bps(int len)
        return;
    }

-
    elems += len;
    if (timespan < 1000) return;

    double dspd = elems;
    dspd = dspd * 1e3 / timespan;
-    speed = meanvalbps((int)dspd);
+    speed = (int)dspd;

    // here we have number of elements after 1s
    printf(" ======================= %d bit/s\n", speed);
--- a/hsmodem/symboltracker.cpp
+++ b/hsmodem/symboltracker.cpp
@ -166,8 +166,7 @@ void km_symtrack_execute(liquid_float_complex _x, liquid_float_complex* _y, unsi

    /*float fr = nco_crcf_get_frequency(q->nco);
    float ph = nco_crcf_get_phase(q->nco);
-
-    printf("%10.6f  %10.6f  %10.6f  %10.6f\n", fr, ph, _x.real, _x.imag);*/
+    printf("f:%10.6f  ph:%10.6f\n", fr, ph);*/

    * _ny = num_outputs;
 }
--- a/hsmodem/tuning.cpp
+++ b/hsmodem/tuning.cpp
@ -26,11 +26,8 @@

 #include "hsmodem.h"

-
-
-
-#define NUMFREQ 12
-int tunefreq[NUMFREQ] = { 150,420,690,960,1230,1500,1770,2040,2310,2580,2850,3000 };
+#define NUMFREQ 13
+int tunefreq[NUMFREQ] = { 150,420,690,960,1230,1500,1770,2040,2310,2580,2850,2890,100 };
 nco_crcf tunenco[NUMFREQ];
 uint32_t tuning_runtime = 0;

@ -49,7 +46,6 @@ void init_tune()
        if (tunenco[i] != NULL) nco_crcf_destroy(tunenco[i]);

        // create NCO for frequency
-        printf("tuning: physcaprate:%d\n", physcaprate);
        float rad_per_sample = ((2.0f * (float)M_PI * (float)tunefreq[i]) / (float)caprate);
        tunenco[i] = nco_crcf_create(LIQUID_NCO);
        nco_crcf_set_phase(tunenco[i], 0.0f);
@ -62,7 +58,7 @@ void init_tune()
 float do_tuning(int send)
 {
    if (tunenco == NULL) return 0.0f;
-    if (send < 0 || send > 4) return 0.0f;
+    if (send < 0 || send > 11) return 0.0f;

    float f = 0;
    if (send == 1)
@ -77,8 +73,8 @@ float do_tuning(int send)
    }
    else
    {
-        nco_crcf_step(tunenco[send-2]);
-        f = nco_crcf_sin(tunenco[send-2]);
+        nco_crcf_step(tunenco[send]);
+        f = nco_crcf_sin(tunenco[send]);
    }

    // adapt speed to soundcard samplerate
@ -104,10 +100,15 @@ float do_tuning(int send)

 float singleFrequency()
 {
-    int i = 11; // 3000 Hz
-
+    int /*i = 11; // 2900 Hz
    if (tunenco[i] == NULL) return 0.0f;
-
    nco_crcf_step(tunenco[i]);
-    return nco_crcf_sin(tunenco[i]);
+    float f = nco_crcf_sin(tunenco[i]);*/
+
+    i = 12; // 2930 Hz
+    if (tunenco[i] == NULL) return 0.0f;
+    nco_crcf_step(tunenco[i]);
+    float f = nco_crcf_sin(tunenco[i]);
+
+    return f;
 }
--- a/hsmodemLinux/hsmodem
+++ b/hsmodemLinux/hsmodem
--- a/hsmodemLinux/oscardata.exe
+++ b/hsmodemLinux/oscardata.exe
--- a/oscardata/oscardata/Form1.Designer.cs
+++ b/oscardata/oscardata/Form1.Designer.cs
@ -109,6 +109,11 @@
            this.bt_resetmodem = new System.Windows.Forms.Button();
            this.textBox3 = new System.Windows.Forms.TextBox();
            this.groupBox3 = new System.Windows.Forms.GroupBox();
+            this.pictureBox4 = new System.Windows.Forms.PictureBox();
+            this.pictureBox3 = new System.Windows.Forms.PictureBox();
+            this.bt_tune_plus = new System.Windows.Forms.Button();
+            this.bt_tune_minus = new System.Windows.Forms.Button();
+            this.cb_marker = new System.Windows.Forms.CheckBox();
            this.pb_audioCAPstatus = new System.Windows.Forms.PictureBox();
            this.pb_audioPBstatus = new System.Windows.Forms.PictureBox();
            this.label6 = new System.Windows.Forms.Label();
@ -116,9 +121,7 @@
            this.tb_CAPvol = new System.Windows.Forms.TrackBar();
            this.tb_PBvol = new System.Windows.Forms.TrackBar();
            this.cb_audioPB = new System.Windows.Forms.ComboBox();
-            this.label3 = new System.Windows.Forms.Label();
            this.cb_audioCAP = new System.Windows.Forms.ComboBox();
-            this.label4 = new System.Windows.Forms.Label();
            this.groupBox2 = new System.Windows.Forms.GroupBox();
            this.lb_rec = new System.Windows.Forms.Label();
            this.tb_recintro = new System.Windows.Forms.TextBox();
@ -151,7 +154,6 @@
            this.progressBar_fifo = new oscardata.KmProgressBar();
            this.vu_cap = new oscardata.KmProgressBar();
            this.vu_pb = new oscardata.KmProgressBar();
-            this.cb_marker = new System.Windows.Forms.CheckBox();
            this.statusStrip1.SuspendLayout();
            this.tabPage_ber.SuspendLayout();
            this.tabPage_image.SuspendLayout();
@ -174,6 +176,8 @@
            this.tabPage_setup.SuspendLayout();
            this.groupBox4.SuspendLayout();
            this.groupBox3.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox4)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.pb_audioCAPstatus)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.pb_audioPBstatus)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.tb_CAPvol)).BeginInit();
@ -274,11 +278,11 @@
            // 
            // bt_allf
            // 
-            this.bt_allf.Location = new System.Drawing.Point(537, 18);
+            this.bt_allf.Location = new System.Drawing.Point(561, 18);
            this.bt_allf.Name = "bt_allf";
-            this.bt_allf.Size = new System.Drawing.Size(95, 23);
+            this.bt_allf.Size = new System.Drawing.Size(71, 23);
            this.bt_allf.TabIndex = 25;
-            this.bt_allf.Text = "150..2850 Hz";
+            this.bt_allf.Text = "1500 Hz";
            this.bt_allf.UseVisualStyleBackColor = true;
            this.bt_allf.Click += new System.EventHandler(this.bt_allf_Click);
            // 
@ -987,11 +991,11 @@
            // label12
            // 
            this.label12.AutoSize = true;
-            this.label12.Location = new System.Drawing.Point(253, 23);
+            this.label12.Location = new System.Drawing.Point(221, 23);
            this.label12.Name = "label12";
-            this.label12.Size = new System.Drawing.Size(54, 13);
+            this.label12.Size = new System.Drawing.Size(103, 13);
            this.label12.TabIndex = 26;
-            this.label12.Text = "language:";
+            this.label12.Text = "Language/Sprache:";
            // 
            // cb_safemode
            // 
@ -1081,6 +1085,10 @@
            // 
            // groupBox3
            // 
+            this.groupBox3.Controls.Add(this.pictureBox4);
+            this.groupBox3.Controls.Add(this.pictureBox3);
+            this.groupBox3.Controls.Add(this.bt_tune_plus);
+            this.groupBox3.Controls.Add(this.bt_tune_minus);
            this.groupBox3.Controls.Add(this.cb_marker);
            this.groupBox3.Controls.Add(this.vu_cap);
            this.groupBox3.Controls.Add(this.vu_pb);
@ -1091,9 +1099,7 @@
            this.groupBox3.Controls.Add(this.tb_CAPvol);
            this.groupBox3.Controls.Add(this.tb_PBvol);
            this.groupBox3.Controls.Add(this.cb_audioPB);
-            this.groupBox3.Controls.Add(this.label3);
            this.groupBox3.Controls.Add(this.cb_audioCAP);
-            this.groupBox3.Controls.Add(this.label4);
            this.groupBox3.Location = new System.Drawing.Point(12, 144);
            this.groupBox3.Name = "groupBox3";
            this.groupBox3.Size = new System.Drawing.Size(743, 163);
@ -1101,11 +1107,70 @@
            this.groupBox3.TabStop = false;
            this.groupBox3.Text = "Transceiver Audio";
            // 
+            // pictureBox4
+            // 
+            this.pictureBox4.BackgroundImage = global::oscardata.Properties.Resources.captureicon;
+            this.pictureBox4.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
+            this.pictureBox4.Location = new System.Drawing.Point(0, 61);
+            this.pictureBox4.Name = "pictureBox4";
+            this.pictureBox4.Size = new System.Drawing.Size(132, 87);
+            this.pictureBox4.TabIndex = 16;
+            this.pictureBox4.TabStop = false;
+            // 
+            // pictureBox3
+            // 
+            this.pictureBox3.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("pictureBox3.BackgroundImage")));
+            this.pictureBox3.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
+            this.pictureBox3.Location = new System.Drawing.Point(5, -7);
+            this.pictureBox3.Name = "pictureBox3";
+            this.pictureBox3.Size = new System.Drawing.Size(127, 85);
+            this.pictureBox3.TabIndex = 16;
+            this.pictureBox3.TabStop = false;
+            // 
+            // bt_tune_plus
+            // 
+            this.bt_tune_plus.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.bt_tune_plus.Location = new System.Drawing.Point(602, 79);
+            this.bt_tune_plus.Name = "bt_tune_plus";
+            this.bt_tune_plus.Size = new System.Drawing.Size(24, 23);
+            this.bt_tune_plus.TabIndex = 22;
+            this.bt_tune_plus.Text = "+";
+            this.bt_tune_plus.UseVisualStyleBackColor = true;
+            this.bt_tune_plus.Visible = false;
+            this.bt_tune_plus.Click += new System.EventHandler(this.bt_tune_plus_Click);
+            // 
+            // bt_tune_minus
+            // 
+            this.bt_tune_minus.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.bt_tune_minus.Location = new System.Drawing.Point(602, 55);
+            this.bt_tune_minus.Name = "bt_tune_minus";
+            this.bt_tune_minus.Size = new System.Drawing.Size(24, 23);
+            this.bt_tune_minus.TabIndex = 21;
+            this.bt_tune_minus.Text = "-";
+            this.bt_tune_minus.UseVisualStyleBackColor = true;
+            this.bt_tune_minus.Visible = false;
+            this.bt_tune_minus.Click += new System.EventHandler(this.bt_tune_minus_Click);
+            // 
+            // cb_marker
+            // 
+            this.cb_marker.AutoSize = true;
+            this.cb_marker.Checked = true;
+            this.cb_marker.CheckState = System.Windows.Forms.CheckState.Checked;
+            this.cb_marker.Location = new System.Drawing.Point(605, 23);
+            this.cb_marker.Name = "cb_marker";
+            this.cb_marker.RightToLeft = System.Windows.Forms.RightToLeft.No;
+            this.cb_marker.Size = new System.Drawing.Size(129, 17);
+            this.cb_marker.TabIndex = 27;
+            this.cb_marker.Text = "100Hz Tuning Marker";
+            this.cb_marker.UseVisualStyleBackColor = true;
+            this.cb_marker.Visible = false;
+            this.cb_marker.CheckedChanged += new System.EventHandler(this.cb_marker_CheckedChanged);
+            // 
            // pb_audioCAPstatus
            // 
            this.pb_audioCAPstatus.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("pb_audioCAPstatus.BackgroundImage")));
            this.pb_audioCAPstatus.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
-            this.pb_audioCAPstatus.Location = new System.Drawing.Point(375, 63);
+            this.pb_audioCAPstatus.Location = new System.Drawing.Point(375, 87);
            this.pb_audioCAPstatus.Name = "pb_audioCAPstatus";
            this.pb_audioCAPstatus.Size = new System.Drawing.Size(21, 21);
            this.pb_audioCAPstatus.TabIndex = 18;
@ -1115,7 +1180,7 @@
            // 
            this.pb_audioPBstatus.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("pb_audioPBstatus.BackgroundImage")));
            this.pb_audioPBstatus.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
-            this.pb_audioPBstatus.Location = new System.Drawing.Point(375, 19);
+            this.pb_audioPBstatus.Location = new System.Drawing.Point(375, 21);
            this.pb_audioPBstatus.Name = "pb_audioPBstatus";
            this.pb_audioPBstatus.Size = new System.Drawing.Size(21, 21);
            this.pb_audioPBstatus.TabIndex = 17;
@ -1124,7 +1189,7 @@
            // label6
            // 
            this.label6.AutoSize = true;
-            this.label6.Location = new System.Drawing.Point(428, 65);
+            this.label6.Location = new System.Drawing.Point(428, 89);
            this.label6.Name = "label6";
            this.label6.Size = new System.Drawing.Size(45, 13);
            this.label6.TabIndex = 16;
@ -1133,7 +1198,7 @@
            // label5
            // 
            this.label5.AutoSize = true;
-            this.label5.Location = new System.Drawing.Point(428, 23);
+            this.label5.Location = new System.Drawing.Point(428, 25);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(45, 13);
            this.label5.TabIndex = 15;
@ -1142,7 +1207,7 @@
            // tb_CAPvol
            // 
            this.tb_CAPvol.Cursor = System.Windows.Forms.Cursors.SizeAll;
-            this.tb_CAPvol.Location = new System.Drawing.Point(479, 61);
+            this.tb_CAPvol.Location = new System.Drawing.Point(479, 85);
            this.tb_CAPvol.Maximum = 100;
            this.tb_CAPvol.MaximumSize = new System.Drawing.Size(0, 24);
            this.tb_CAPvol.Minimum = 1;
@ -1157,7 +1222,7 @@
            // tb_PBvol
            // 
            this.tb_PBvol.Cursor = System.Windows.Forms.Cursors.SizeAll;
-            this.tb_PBvol.Location = new System.Drawing.Point(479, 19);
+            this.tb_PBvol.Location = new System.Drawing.Point(479, 21);
            this.tb_PBvol.Maximum = 100;
            this.tb_PBvol.MaximumSize = new System.Drawing.Size(0, 24);
            this.tb_PBvol.Minimum = 1;
@ -1172,39 +1237,21 @@
            // cb_audioPB
            // 
            this.cb_audioPB.FormattingEnabled = true;
-            this.cb_audioPB.Location = new System.Drawing.Point(138, 19);
+            this.cb_audioPB.Location = new System.Drawing.Point(138, 21);
            this.cb_audioPB.Name = "cb_audioPB";
            this.cb_audioPB.Size = new System.Drawing.Size(230, 21);
            this.cb_audioPB.TabIndex = 7;
            this.cb_audioPB.Text = "Default";
            // 
-            // label3
-            // 
-            this.label3.AutoSize = true;
-            this.label3.Location = new System.Drawing.Point(12, 23);
-            this.label3.Name = "label3";
-            this.label3.Size = new System.Drawing.Size(121, 13);
-            this.label3.TabIndex = 8;
-            this.label3.Text = "Audio Playback Device:";
-            // 
            // cb_audioCAP
            // 
            this.cb_audioCAP.FormattingEnabled = true;
-            this.cb_audioCAP.Location = new System.Drawing.Point(138, 63);
+            this.cb_audioCAP.Location = new System.Drawing.Point(138, 87);
            this.cb_audioCAP.Name = "cb_audioCAP";
            this.cb_audioCAP.Size = new System.Drawing.Size(230, 21);
            this.cb_audioCAP.TabIndex = 9;
            this.cb_audioCAP.Text = "Default";
            // 
-            // label4
-            // 
-            this.label4.AutoSize = true;
-            this.label4.Location = new System.Drawing.Point(12, 67);
-            this.label4.Name = "label4";
-            this.label4.Size = new System.Drawing.Size(112, 13);
-            this.label4.TabIndex = 10;
-            this.label4.Text = "Audio Record Device:";
-            // 
            // groupBox2
            // 
            this.groupBox2.Controls.Add(this.lb_rec);
@ -1224,7 +1271,7 @@
            this.groupBox2.Controls.Add(this.cb_stampcall);
            this.groupBox2.Location = new System.Drawing.Point(12, 13);
            this.groupBox2.Name = "groupBox2";
-            this.groupBox2.Size = new System.Drawing.Size(734, 127);
+            this.groupBox2.Size = new System.Drawing.Size(743, 127);
            this.groupBox2.TabIndex = 13;
            this.groupBox2.TabStop = false;
            this.groupBox2.Text = "Personal Settings";
@ -1234,7 +1281,7 @@
            this.lb_rec.AutoSize = true;
            this.lb_rec.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.lb_rec.ForeColor = System.Drawing.Color.Red;
-            this.lb_rec.Location = new System.Drawing.Point(498, 101);
+            this.lb_rec.Location = new System.Drawing.Point(576, 101);
            this.lb_rec.Name = "lb_rec";
            this.lb_rec.Size = new System.Drawing.Size(23, 13);
            this.lb_rec.TabIndex = 29;
@ -1246,7 +1293,7 @@
            this.tb_recintro.BorderStyle = System.Windows.Forms.BorderStyle.None;
            this.tb_recintro.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.tb_recintro.ForeColor = System.Drawing.Color.Black;
-            this.tb_recintro.Location = new System.Drawing.Point(256, 100);
+            this.tb_recintro.Location = new System.Drawing.Point(334, 100);
            this.tb_recintro.Multiline = true;
            this.tb_recintro.Name = "tb_recintro";
            this.tb_recintro.Size = new System.Drawing.Size(121, 19);
@ -1259,7 +1306,7 @@
            this.bt_astop.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
            this.bt_astop.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.bt_astop.ForeColor = System.Drawing.SystemColors.Control;
-            this.bt_astop.Location = new System.Drawing.Point(449, 89);
+            this.bt_astop.Location = new System.Drawing.Point(527, 89);
            this.bt_astop.Name = "bt_astop";
            this.bt_astop.Size = new System.Drawing.Size(32, 36);
            this.bt_astop.TabIndex = 27;
@ -1272,7 +1319,7 @@
            this.bt_aplay.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
            this.bt_aplay.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.bt_aplay.ForeColor = System.Drawing.SystemColors.Control;
-            this.bt_aplay.Location = new System.Drawing.Point(411, 89);
+            this.bt_aplay.Location = new System.Drawing.Point(489, 89);
            this.bt_aplay.Name = "bt_aplay";
            this.bt_aplay.Size = new System.Drawing.Size(32, 36);
            this.bt_aplay.TabIndex = 26;
@ -1285,7 +1332,7 @@
            this.bt_arecord.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
            this.bt_arecord.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.bt_arecord.ForeColor = System.Drawing.SystemColors.Control;
-            this.bt_arecord.Location = new System.Drawing.Point(373, 89);
+            this.bt_arecord.Location = new System.Drawing.Point(451, 89);
            this.bt_arecord.Name = "bt_arecord";
            this.bt_arecord.Size = new System.Drawing.Size(32, 36);
            this.bt_arecord.TabIndex = 25;
@ -1504,7 +1551,7 @@
            // lb_rxsync
            // 
            this.lb_rxsync.AutoSize = true;
-            this.lb_rxsync.Location = new System.Drawing.Point(1094, 643);
+            this.lb_rxsync.Location = new System.Drawing.Point(984, 596);
            this.lb_rxsync.Name = "lb_rxsync";
            this.lb_rxsync.Size = new System.Drawing.Size(52, 13);
            this.lb_rxsync.TabIndex = 20;
@ -1514,7 +1561,7 @@
            // 
            this.pb_rxsync.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("pb_rxsync.BackgroundImage")));
            this.pb_rxsync.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
-            this.pb_rxsync.Location = new System.Drawing.Point(1155, 636);
+            this.pb_rxsync.Location = new System.Drawing.Point(1047, 591);
            this.pb_rxsync.Name = "pb_rxsync";
            this.pb_rxsync.Size = new System.Drawing.Size(24, 24);
            this.pb_rxsync.TabIndex = 19;
@ -1553,30 +1600,18 @@
            // 
            // vu_cap
            // 
-            this.vu_cap.Location = new System.Drawing.Point(479, 87);
+            this.vu_cap.Location = new System.Drawing.Point(479, 111);
            this.vu_cap.Name = "vu_cap";
            this.vu_cap.Size = new System.Drawing.Size(100, 10);
            this.vu_cap.TabIndex = 20;
            // 
            // vu_pb
            // 
-            this.vu_pb.Location = new System.Drawing.Point(479, 45);
+            this.vu_pb.Location = new System.Drawing.Point(479, 47);
            this.vu_pb.Name = "vu_pb";
            this.vu_pb.Size = new System.Drawing.Size(100, 10);
            this.vu_pb.TabIndex = 19;
            // 
-            // cb_marker
-            // 
-            this.cb_marker.AutoSize = true;
-            this.cb_marker.Location = new System.Drawing.Point(605, 21);
-            this.cb_marker.Name = "cb_marker";
-            this.cb_marker.RightToLeft = System.Windows.Forms.RightToLeft.No;
-            this.cb_marker.Size = new System.Drawing.Size(123, 17);
-            this.cb_marker.TabIndex = 27;
-            this.cb_marker.Text = "3kHz Tuning Marker";
-            this.cb_marker.UseVisualStyleBackColor = true;
-            this.cb_marker.CheckedChanged += new System.EventHandler(this.cb_marker_CheckedChanged);
-            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
@ -1601,7 +1636,7 @@
            this.ForeColor = System.Drawing.SystemColors.ControlText;
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.Name = "Form1";
-            this.Text = "AMSAT-DL Multimedia HS Modem V0.55 by DJ0ABR";
+            this.Text = "AMSAT-DL Multimedia HS Modem V0.56 by DJ0ABR";
            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
            this.statusStrip1.ResumeLayout(false);
            this.statusStrip1.PerformLayout();
@ -1635,6 +1670,8 @@
            this.groupBox4.PerformLayout();
            this.groupBox3.ResumeLayout(false);
            this.groupBox3.PerformLayout();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox4)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.pb_audioCAPstatus)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.pb_audioPBstatus)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.tb_CAPvol)).EndInit();
@ -1700,9 +1737,7 @@
        private System.Windows.Forms.TextBox tb_shutdown;
        private System.Windows.Forms.Button bt_shutdown;
        private System.Windows.Forms.Button bt_resetmodem;
-        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.ComboBox cb_audioCAP;
-        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.ComboBox cb_audioPB;
        private System.Windows.Forms.GroupBox groupBox4;
        private System.Windows.Forms.GroupBox groupBox3;
@ -1773,6 +1808,10 @@
        private System.Windows.Forms.Label lb_tuningqrgs;
        private System.Windows.Forms.Button bt_allf;
        private System.Windows.Forms.CheckBox cb_marker;
+        private System.Windows.Forms.PictureBox pictureBox3;
+        private System.Windows.Forms.PictureBox pictureBox4;
+        private System.Windows.Forms.Button bt_tune_minus;
+        private System.Windows.Forms.Button bt_tune_plus;
    }
 }

--- a/oscardata/oscardata/Form1.cs
+++ b/oscardata/oscardata/Form1.cs
@ -1100,10 +1100,15 @@ namespace oscardata
            String ip = "255.255.255.255";
            String[] myips = statics.getOwnIPs();
            //Console.WriteLine("BClen: " + myips.Length.ToString());
-            // nur wenn der PC eine IP hat
-            // hat er mehr, dann wissen wir nicht in welchem Netz wird broadcasten sollen, nehmen also die 255.255.255.255
-            if (myips.Length == 1)
+            // if PC has multiple IPs then use 255.255.255.255
+            /*for (int i = 0; i < myips.Length; i++)
            {
+                Console.WriteLine("ip:" + myips[i]);
+            }*/
+            if (myips.Length >= 1)
+            {
+                statics.MyIP = myips[0];
+                // PC has one IP, make it to a broadcast IP by adding 255
                int idx = myips[0].LastIndexOf('.');
                if (idx >= 0)
                {
@ -1173,11 +1178,22 @@ namespace oscardata
                    txb[i + 110] = bcap[i];
            }

-            Udp.UdpBCsend(txb, GetMyBroadcastIP(), statics.UdpBCport_AppToModem);
+            if (statics.ModemIP == "1.2.3.4")
+            {
+                // still searching a modem
+                //Console.WriteLine("1: send BCsearch to: " + GetMyBroadcastIP());
+                Udp.UdpBCsend(txb, GetMyBroadcastIP(), statics.UdpBCport_AppToModem);
+            }
+            else
+            {
+                // modem IP is known, send to it directly, no broadcast
+                //Console.WriteLine("2: send BCsearch to: " + statics.ModemIP);
+                Udp.UdpBCsend(txb, statics.ModemIP, statics.UdpBCport_AppToModem);
+            }

            Udp.searchtimeout++;
            if (Udp.searchtimeout >= 3)
-                statics.ModemIP = "1.2.3.4";
+                statics.ModemIP = "1.2.3.4"; // which means: no IP known
        }

        private void bt_file_send_Click(object sender, EventArgs e)
@ -1229,7 +1245,9 @@ namespace oscardata

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
+            bool b = cb_switchtoLS.Checked;
            allVoiceModesOff();
+            cb_switchtoLS.Checked = b;

            if (cb_speed.Text.Contains("3000")) statics.real_datarate = 3000;
            if (cb_speed.Text.Contains("4000")) statics.real_datarate = 4000;
@ -1388,6 +1406,14 @@ namespace oscardata

            if (cb_audioPB.Text.Length <= 1) cb_audioPB.Text = "Default";
            if (cb_audioCAP.Text.Length <= 1) cb_audioCAP.Text = "Default";
+
+            if (tb_callsign.Text == "DJ0ABR")
+            {
+                bt_resetmodem.Visible = true;
+                bt_tune_minus.Visible = true;
+                bt_tune_plus.Visible = true;
+                cb_marker.Visible = true;
+            }
        }

        void save_Setup()
@ -1727,8 +1753,6 @@ namespace oscardata
                groupBox3.Text = "Transceiver Audio";
                label6.Text = "Volume:";
                label5.Text = "Volume:";
-                label3.Text = "Audio Playback Device:";
-                label4.Text = "Audio Record Device:";
                groupBox2.Text = "Personal Settings";
                cb_stampinfo.Text = "Insert Info into picture";
                textBox4.Text = "transmissions";
@ -1742,10 +1766,11 @@ namespace oscardata
                label_capfifo.Text = "RX Buffer:";
                lb_rxsignal.Text = "RX Signal:";
                lb_rxsync.Text = "RX Sync:";
-                cb_sendIntro.Text = "send introduction";
+                cb_sendIntro.Text = "send introduction before TX";
                tb_recintro.Text = "record introduction";
-                lb_tuningqrgs.Text = "Frequency Test";
-                cb_marker.Text = "3kHz Tuning Marker";
+                lb_tuningqrgs.Text = "Send Mid-Frequency:";
+                cb_marker.Text = "2.9kHz Tuning Marker";
+                label13.Text = "Data Security:";
            }

            if (language == 1)
@ -1793,17 +1818,16 @@ namespace oscardata
                cb_stampinfo.Text = "Füge Infotext ins Bild ein";
                textBox1.Text = "sende Ansagetext vor TX, alle";
                textBox4.Text = "Aussendungen";
-                label3.Text = "Audio Wiedergabe";
-                label4.Text = "Audio Eingang";
                label5.Text = "Lautst.:";
                label6.Text = "Lautst.:";
                groupBox4.Text = "Wartung";
                textBox3.Text = "Ausschalten wenn hsmodem auf separatem PC läuft";
                tb_shutdown.Text = "Vor dem Ausschalten eines SBC diesen hier herunterfahren";
-                cb_sendIntro.Text = "sende Vorstellung";
+                cb_sendIntro.Text = "sende Vorstellung vor TX";
                tb_recintro.Text = "Vorstellung aufnehmen";
-                lb_tuningqrgs.Text = "Frequenz Test:";
-                cb_marker.Text = "3kHz Tuning Markierung";
+                lb_tuningqrgs.Text = "Sende Mittenfrequenz:";
+                cb_marker.Text = "2,9kHz Tuning Markierung";
+                label13.Text = "Datensicherheit:";
            }
        }

@ -1936,7 +1960,7 @@ namespace oscardata

        private void bt_allf_Click(object sender, EventArgs e)
        {
-            bt_tuning(1);
+            bt_tuning(5);
        }

        private void cb_marker_CheckedChanged(object sender, EventArgs e)
@ -1946,6 +1970,22 @@ namespace oscardata
            txdata[1] = (Byte)(cb_marker.Checked ? 1 : 0);
            Udp.UdpSendCtrl(txdata);
        }
+
+        private void bt_tune_minus_Click(object sender, EventArgs e)
+        {
+            Byte[] txdata = new byte[2];
+            txdata[0] = statics.setfreq;
+            txdata[1] = 10;
+            Udp.UdpSendCtrl(txdata);
+        }
+
+        private void bt_tune_plus_Click(object sender, EventArgs e)
+        {
+            Byte[] txdata = new byte[2];
+            txdata[0] = statics.setfreq;
+            txdata[1] = 255 - 10;
+            Udp.UdpSendCtrl(txdata);
+        }
    }

 }
--- a/oscardata/oscardata/Form1.resx
+++ b/oscardata/oscardata/Form1.resx
@ -137,7 +137,7 @@
        AAEAAAD/////AQAAAAAAAAAMAgAAAFdTeXN0ZW0uV2luZG93cy5Gb3JtcywgVmVyc2lvbj00LjAuMC4w
        LCBDdWx0dXJlPW5ldXRyYWwsIFB1YmxpY0tleVRva2VuPWI3N2E1YzU2MTkzNGUwODkFAQAAACZTeXN0
        ZW0uV2luZG93cy5Gb3Jtcy5JbWFnZUxpc3RTdHJlYW1lcgEAAAAERGF0YQcCAgAAAAkDAAAADwMAAABw
-        FwAAAk1TRnQBSQFMAgEBDQEAAQgBBQEIAQUBEAEAARABAAT/AQkBAAj/AUIBTQE2AQQGAAE2AQQCAAEo
+        FwAAAk1TRnQBSQFMAgEBDQEAAUABBgFAAQYBEAEAARABAAT/AQkBAAj/AUIBTQE2AQQGAAE2AQQCAAEo
        AwABQAMAAUADAAEBAQABCAYAARAYAAGAAgABgAMAAoABAAGAAwABgAEAAYABAAKAAgADwAEAAcAB3AHA
        AQAB8AHKAaYBAAEzBQABMwEAATMBAAEzAQACMwIAAxYBAAMcAQADIgEAAykBAANVAQADTQEAA0IBAAM5
        AQABgAF8Af8BAAJQAf8BAAGTAQAB1gEAAf8B7AHMAQABxgHWAe8BAAHWAucBAAGQAakBrQIAAf8BMwMA
@ -4495,6 +4495,344 @@
        bPHp06fm8+fPLb58+dJ8/fq1EsCKioqKioqK94mIvEWICJ0jInVgLKnLiV1O8MYQu5zcQeyc3IFv374p
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        tfntt99a/P77782//vUvxR9//NH8f2wEO4ZCaXfjAAAAAElFTkSuQmCC
+</value>
+  </data>
+  <data name="pictureBox3.BackgroundImage" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+    <value>
+        iVBORw0KGgoAAAANSUhEUgAAAOQAAABCCAYAAABHEnp+AAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAL
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+        wIg2Hr6dReMAAAAASUVORK5CYII=
+</value>
+  </data>
+  <data name="pb_audioCAPstatus.BackgroundImage" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+    <value>
+        iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAABGdBTUEAALGPC/xhBQAAAtxJREFUSEvt
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+        GRYW3wHoVCJ7F4lIiQAAAABJRU5ErkJggg==
+</value>
+  </data>
+  <data name="pb_audioPBstatus.BackgroundImage" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+    <value>
+        iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAABGdBTUEAALGPC/xhBQAAAtxJREFUSEvt
+        0m1Ik1EUB3C3yk193OPUJZovm69Zznwpw2BYkE6TNDdNbaXOt+l0Pr61FNNSFMs0bUUayoKIgpaYmNN0
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+        Vz+jR6FO+IKlYbmT0cpRamqDY4PjzYp7FWB4awDdEx3Qp+hndDm9iUSWj5fDW+9c63ydMTPYNdMFnTOd
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+        JNHFeIW8+IhLks+Nk3WwvTX0lQvj4kVGC+wz7dmiKlFX9q0MqJ+sgbq71XBypBpqTScgpC34K1vFPkKi
+        iwk0guiws8GfKoYYrDQzcHSoAHc0hr50znde+BkOCgeWt9a7XXkjBapGi6HCxKB2kMGqwXKQ6MK/cVSc
+        TBJdyqfSx6juVoCmTwnMgBJKhpVQPJAOodXbnjtlbXTlK/gsz0LRubSr8VBmzoLiO0oo6leC1qgG6YU9
+        c1Y5Viqy6teoDMrL85jrbKYhDnP75JA/KMcCUyIW9MsgqGzrU/ds9/ZUfSRoRpJAPSTHPKMcSgYyUNYR
+        PUdlURqy5vds0mz8/LTC15k9kaAciMRsUxTmjkVBbn8kpuolmD8egyUTiVA6mjz/cBwc7IgGOyVdRq7/
+        GRuFzZaActGbtN6dmDwoxkPmQFCMilExGoDJw5tR2iOA3ddojDjtBfbp/Epy7e9QSVSguMjjXUKfC0Sb
+        aYgdn68JGvaNzZ/DfJC2+oBdKl1D4stDJVAhQRqP94en3ED2iI/yx3xMeuiA8Rf9gJbR9SS2Mtb7rcNC
+        Cz0+qGY8MG1WgCmX/ZGO5TVxpBwWiawcN4YbvosRfVQbgoEnpdo4ey1Xb/lPggO2YZ6pjgVULJdNWmv+
+        GRYW3wHoVCJ7F4lIiQAAAABJRU5ErkJggg==
 </value>
  </data>
  <data name="pictureBox1.BackgroundImage" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
@ -4874,42 +5212,6 @@
        aYgdn68JGvaNzZ/DfJC2+oBdKl1D4stDJVAhQRqP94en3ED2iI/yx3xMeuiA8Rf9gJbR9SS2Mtb7rcNC
        Cz0+qGY8MG1WgCmX/ZGO5TVxpBwWiawcN4YbvosRfVQbgoEnpdo4ey1Xb/lPggO2YZ6pjgVULJdNWmv+
        GRYW3wHoVCJ7F4lIiQAAAABJRU5ErkJggg==
-</value>
-  </data>
-  <data name="pb_audioCAPstatus.BackgroundImage" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
-    <value>
-        iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAABGdBTUEAALGPC/xhBQAAAtxJREFUSEvt
-        0m1Ik1EUB3C3yk193OPUJZovm69Zznwpw2BYkE6TNDdNbaXOt+l0Pr61FNNSFMs0bUUayoKIgpaYmNN0
-        U1MxJCKiD2VFkBBRBNGnovKcDG6CGFHql8IfHC6c87/nfrkWa/4PTmVOXLVBrY3SRQlJa/Vw1VxLXh2v
-        Vz+jR6FO+IKlYbmT0cpRamqDY4PjzYp7FWB4awDdEx3Qp+hndDm9iUSWj5fDW+9c63ydMTPYNdMFnTOd
-        +KMaphtA0iG5TWJL+df4y5huZtz3uK8vaS1hl2u3zq3G7UqeUYWtD1qw5X4zNE+fwaapJhSfF3+xLbVN
-        JNHFeIW8+IhLks+Nk3WwvTX0lQvj4kVGC+wz7dmiKlFX9q0MqJ+sgbq71XBypBpqTScgpC34K1vFPkKi
-        iwk0guiws8GfKoYYrDQzcHSoAHc0hr50znde+BkOCgeWt9a7XXkjBapGi6HCxKB2kMGqwXKQ6MK/cVSc
-        TBJdyqfSx6juVoCmTwnMgBJKhpVQPJAOodXbnjtlbXTlK/gsz0LRubSr8VBmzoLiO0oo6leC1qgG6YU9
-        c1Y5Viqy6teoDMrL85jrbKYhDnP75JA/KMcCUyIW9MsgqGzrU/ds9/ZUfSRoRpJAPSTHPKMcSgYyUNYR
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-        GRuFzZaActGbtN6dmDwoxkPmQFCMilExGoDJw5tR2iOA3ddojDjtBfbp/Epy7e9QSVSguMjjXUKfC0Sb
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-        GRYW3wHoVCJ7F4lIiQAAAABJRU5ErkJggg==
-</value>
-  </data>
-  <data name="pb_audioPBstatus.BackgroundImage" type="System.Drawing.Bitmap, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
-    <value>
-        iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAABGdBTUEAALGPC/xhBQAAAtxJREFUSEvt
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-        U1MxJCKiD2VFkBBRBNGnovKcDG6CGFHql8IfHC6c87/nfrkWa/4PTmVOXLVBrY3SRQlJa/Vw1VxLXh2v
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-        +KMaphtA0iG5TWJL+df4y5huZtz3uK8vaS1hl2u3zq3G7UqeUYWtD1qw5X4zNE+fwaapJhSfF3+xLbVN
-        JNHFeIW8+IhLks+Nk3WwvTX0lQvj4kVGC+wz7dmiKlFX9q0MqJ+sgbq71XBypBpqTScgpC34K1vFPkKi
-        iwk0guiws8GfKoYYrDQzcHSoAHc0hr50znde+BkOCgeWt9a7XXkjBapGi6HCxKB2kMGqwXKQ6MK/cVSc
-        TBJdyqfSx6juVoCmTwnMgBJKhpVQPJAOodXbnjtlbXTlK/gsz0LRubSr8VBmzoLiO0oo6leC1qgG6YU9
-        c1Y5Viqy6teoDMrL85jrbKYhDnP75JA/KMcCUyIW9MsgqGzrU/ds9/ZUfSRoRpJAPSTHPKMcSgYyUNYR
-        PUdlURqy5vds0mz8/LTC15k9kaAciMRsUxTmjkVBbn8kpuolmD8egyUTiVA6mjz/cBwc7IgGOyVdRq7/
-        GRuFzZaActGbtN6dmDwoxkPmQFCMilExGoDJw5tR2iOA3ddojDjtBfbp/Epy7e9QSVSguMjjXUKfC0Sb
-        aYgdn68JGvaNzZ/DfJC2+oBdKl1D4stDJVAhQRqP94en3ED2iI/yx3xMeuiA8Rf9gJbR9SS2Mtb7rcNC
-        Cz0+qGY8MG1WgCmX/ZGO5TVxpBwWiawcN4YbvosRfVQbgoEnpdo4ey1Xb/lPggO2YZ6pjgVULJdNWmv+
-        GRYW3wHoVCJ7F4lIiQAAAABJRU5ErkJggg==
 </value>
  </data>
  <data name="richTextBox1.Text" xml:space="preserve">
--- a/oscardata/oscardata/Properties/Resources.Designer.cs
+++ b/oscardata/oscardata/Properties/Resources.Designer.cs
@ -80,6 +80,16 @@ namespace oscardata.Properties {
            }
        }
        
+        /// <summary>
+        ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap captureicon {
+            get {
+                object obj = ResourceManager.GetObject("captureicon", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
        /// <summary>
        ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
        /// </summary>
@ -250,6 +260,16 @@ namespace oscardata.Properties {
            }
        }
        
+        /// <summary>
+        ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap playbackicon {
+            get {
+                object obj = ResourceManager.GetObject("playbackicon", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
        /// <summary>
        ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
        /// </summary>
--- a/oscardata/oscardata/Properties/Resources.resx
+++ b/oscardata/oscardata/Properties/Resources.resx
@ -226,4 +226,10 @@
  <data name="stopplay" type="System.Resources.ResXFileRef, System.Windows.Forms">
    <value>stopplay.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
  </data>
+  <data name="captureicon" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>captureicon.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="playbackicon" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>playbackicon.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>
--- a/oscardata/oscardata/Properties/captureicon.png
+++ b/oscardata/oscardata/Properties/captureicon.png
--- a/oscardata/oscardata/Properties/playbackicon.png
+++ b/oscardata/oscardata/Properties/playbackicon.png
--- a/oscardata/oscardata/bin/Release/oscardata.exe
+++ b/oscardata/oscardata/bin/Release/oscardata.exe
--- a/oscardata/oscardata/config.cs
+++ b/oscardata/oscardata/config.cs
@ -38,6 +38,7 @@ namespace oscardata
        public static Byte terminate = 26;
        public static Byte tuning = 27;
        public static Byte marker = 28;
+        public static Byte setfreq = 29;

        // frame sequence, modem needs that for i.e. sending a preamble
        public static Byte FirstFrame = 0;
@ -54,6 +55,7 @@ namespace oscardata
        // global static variables
        public static bool running = true;
        public static String ModemIP = "1.2.3.4";
+        public static String MyIP = "1.2.3.4";
        public static int UdpBCport_AppToModem = 40131;          // broadcast port for modem search
        public static int UdpTXport = 40132;                     // to modem
        public static int UdpRXport = 40133;                     // from modem
--- a/oscardata/oscardata/oscardata.csproj
+++ b/oscardata/oscardata/oscardata.csproj
@ -150,6 +150,8 @@
    <None Include="Properties\record.png" />
    <None Include="Properties\stopplay.png" />
    <None Include="Properties\playback.png" />
+    <None Include="Properties\playbackicon.png" />
+    <None Include="Properties\captureicon.png" />
    <Content Include="Satellite-icon.ico" />
  </ItemGroup>
  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
--- a/oscardata/oscardata/udp.cs
+++ b/oscardata/oscardata/udp.cs
@ -61,8 +61,11 @@ namespace oscardata
        }

        // Udp RX Loop runs in its own thread
+        
        static void Udprxloop()
        {
+            int extIPcnt = 0;
+
            // define UDP port
            UdpClient udpc = new UdpClient(statics.UdpRXport);
            udpc.Client.ReceiveTimeout = 100;
@ -95,7 +98,27 @@ namespace oscardata
                        // Broadcast response
                        if (rxtype == statics.udp_bc)
                        {
-                            statics.ModemIP = RemoteEndpoint.Address.ToString();
+                            String ModIP = RemoteEndpoint.Address.ToString();
+                            if (ModIP != statics.MyIP)
+                            {
+                                // this is not the local IP
+                                // wait for 3 Receptions before accepting it
+                                if (extIPcnt < 3)
+                                {
+                                    //Console.WriteLine("myIP:"+statics.MyIP+" modem is ext IP:"+ModIP+", waiting:" + extIPcnt);
+                                    if (extIPcnt < 4) extIPcnt++;
+                                    if (extIPcnt < 3)
+                                        continue;
+                                }
+                                //Console.WriteLine("modem is ext IP, accepted");
+                            }
+                            else
+                            {
+                                //Console.WriteLine("modem is local IP");
+                                extIPcnt = 0;
+                            }
+
+                            statics.ModemIP = ModIP;
                            searchtimeout = 0;
                            // message b contains audio devices and init status
                            statics.initAudioStatus = b[0];
@ -266,10 +289,10 @@ namespace oscardata
                    for (int x = 10; x <= 390; x += 10)
                        gr.DrawLine(pen, x, yl, x, yh);

+                    gr.DrawLine(penred, 10, yl, 10, yh);
                    gr.DrawLine(penred, 150, yl, 150, yh);
                    gr.DrawLine(pensolid, 20, yl, 20, yh);
                    gr.DrawLine(pensolid, 280, yl, 280, yh);
-                    gr.DrawLine(penred, 300, yl, 300, yh);
                    gr.DrawLine(pensolid, 360, yl, 360, yh);

                    gr.DrawRectangle(penred, 15, yh, 270, yl-yh);