diff --git a/plugins/channelrx/wdsprx/CMakeLists.txt b/plugins/channelrx/wdsprx/CMakeLists.txt
index d24c9587f..bb3b9f1d5 100644
--- a/plugins/channelrx/wdsprx/CMakeLists.txt
+++ b/plugins/channelrx/wdsprx/CMakeLists.txt
@@ -19,7 +19,8 @@ set(wdsprx_HEADERS
 )
 
 include_directories(
-        ${CMAKE_SOURCE_DIR}/swagger/sdrangel/code/qt5/client
+    ${CMAKE_SOURCE_DIR}/swagger/sdrangel/code/qt5/client
+    ${CMAKE_SOURCE_DIR}/wdsp
 )
 
 if(NOT SERVER_MODE)
diff --git a/plugins/channelrx/wdsprx/wdsprxsink.cpp b/plugins/channelrx/wdsprx/wdsprxsink.cpp
index 299a5192f..027b465da 100644
--- a/plugins/channelrx/wdsprx/wdsprxsink.cpp
+++ b/plugins/channelrx/wdsprx/wdsprxsink.cpp
@@ -25,11 +25,14 @@
 #include "util/db.h"
 #include "util/messagequeue.h"
 #include "maincore.h"
+#include "RXA.hpp"
 
 #include "wdsprxsink.h"
 
 const int WDSPRxSink::m_ssbFftLen = 2048;
 const int WDSPRxSink::m_agcTarget = 3276; // 32768/10 -10 dB amplitude => -20 dB power: center of normal signal
+const int WDSPRxSink::m_wdspSampleRate = 48000;
+const int WDSPRxSink::m_wdspBufSize = 512;
 
 WDSPRxSink::WDSPRxSink() :
         m_audioBinaual(false),
@@ -69,6 +72,12 @@ WDSPRxSink::WDSPRxSink() :
 	m_magsqPeak = 0.0;
 	m_magsqCount = 0;
 
+    m_rxa = WDSP::RXA::create_rxa(
+        m_wdspSampleRate, // input samplerate
+        m_wdspSampleRate, // output samplerate
+        m_wdspSampleRate, // sample rate for mainstream dsp processing (dsp)
+        m_wdspBufSize     // number complex samples processed per buffer in mainstream dsp processing
+    );
 	SSBFilter = new fftfilt(m_LowCutoff / m_audioSampleRate, m_Bandwidth / m_audioSampleRate, m_ssbFftLen);
 	DSBFilter = new fftfilt((2.0f * m_Bandwidth) / m_audioSampleRate, 2 * m_ssbFftLen);
 
@@ -81,6 +90,7 @@ WDSPRxSink::WDSPRxSink() :
 
 WDSPRxSink::~WDSPRxSink()
 {
+    WDSP::RXA::destroy_rxa(m_rxa);
     delete SSBFilter;
     delete DSBFilter;
 }
@@ -289,7 +299,7 @@ void WDSPRxSink::applyChannelSettings(int channelSampleRate, int channelFrequenc
         Real interpolatorBandwidth = (m_Bandwidth * 1.5f) > channelSampleRate ? channelSampleRate : (m_Bandwidth * 1.5f);
         m_interpolator.create(16, channelSampleRate, interpolatorBandwidth, 2.0f);
         m_interpolatorDistanceRemain = 0;
-        m_interpolatorDistance = (Real) channelSampleRate / (Real) m_audioSampleRate;
+        m_interpolatorDistance = (Real) channelSampleRate / (Real) m_wdspSampleRate;
     }
 
     m_channelSampleRate = channelSampleRate;
@@ -303,7 +313,9 @@ void WDSPRxSink::applyAudioSampleRate(int sampleRate)
     Real interpolatorBandwidth = (m_Bandwidth * 1.5f) > m_channelSampleRate ? m_channelSampleRate : (m_Bandwidth * 1.5f);
     m_interpolator.create(16, m_channelSampleRate, interpolatorBandwidth, 2.0f);
     m_interpolatorDistanceRemain = 0;
-    m_interpolatorDistance = (Real) m_channelSampleRate / (Real) sampleRate;
+    m_interpolatorDistance = (Real) m_channelSampleRate / (Real) m_wdspSampleRate;
+
+    WDSP::RXA::setOutputSamplerate(m_rxa, sampleRate);
 
     SSBFilter->create_filter(m_LowCutoff / (float) sampleRate, m_Bandwidth / (float) sampleRate, m_settings.m_filterBank[m_settings.m_filterIndex].m_fftWindow);
     DSBFilter->create_dsb_filter(m_Bandwidth / (float) sampleRate, m_settings.m_filterBank[m_settings.m_filterIndex].m_fftWindow);
diff --git a/plugins/channelrx/wdsprx/wdsprxsink.h b/plugins/channelrx/wdsprx/wdsprxsink.h
index f2e9ccdac..d16b8c6ca 100644
--- a/plugins/channelrx/wdsprx/wdsprxsink.h
+++ b/plugins/channelrx/wdsprx/wdsprxsink.h
@@ -34,6 +34,10 @@
 class SpectrumVis;
 class ChannelAPI;
 
+namespace WDSP {
+    class RXA;
+}
+
 class WDSPRxSink : public ChannelSampleSink {
 public:
     WDSPRxSink();
@@ -132,9 +136,12 @@ private:
 
     QVector<qint16> m_demodBuffer;
     int m_demodBufferFill;
+    WDSP::RXA *m_rxa;
 
 	static const int m_ssbFftLen;
 	static const int m_agcTarget;
+    static const int m_wdspSampleRate;
+    static const int m_wdspBufSize;
 
     void processOneSample(Complex &ci);
 };
diff --git a/wdsp/RXA.cpp b/wdsp/RXA.cpp
index 0d3ab966e..4d4629079 100644
--- a/wdsp/RXA.cpp
+++ b/wdsp/RXA.cpp
@@ -58,24 +58,26 @@ namespace WDSP {
 RXA* RXA::create_rxa (
     int in_rate,                // input samplerate
     int out_rate,               // output samplerate
-    int in_size,                // input buffsize (complex samples) in a fexchange() operation
     int dsp_rate,               // sample rate for mainstream dsp processing
-    int dsp_size,               // number complex samples processed per buffer in mainstream dsp processing
-    int dsp_insize,             // size (complex samples) of the output of the r1 (input) buffer
-    int dsp_outsize,            // size (complex samples) of the input of the r2 (output) buffer
-    int out_size                // output buffsize (complex samples) in a fexchange() operation
+    int dsp_size                // number complex samples processed per buffer in mainstream dsp processing
 )
 {
     RXA* rxa = new RXA;
 
     rxa->in_rate = in_rate;
     rxa->out_rate = out_rate;
-    rxa->in_size = in_size;
     rxa->dsp_rate = dsp_rate;
     rxa->dsp_size = dsp_size;
-    rxa->dsp_insize = dsp_insize;
-    rxa->dsp_outsize = dsp_outsize;
-    rxa->out_size = out_size;
+
+    if (in_rate  >= dsp_rate)
+        rxa->dsp_insize  = dsp_size * (in_rate  / dsp_rate);
+    else
+        rxa->dsp_insize  = dsp_size / (dsp_rate /  in_rate);
+
+    if (out_rate >= dsp_rate)
+        rxa->dsp_outsize = dsp_size * (out_rate / dsp_rate);
+    else
+        rxa->dsp_outsize = dsp_size / (dsp_rate / out_rate);
 
     rxa->mode = RXA_LSB;
     rxa->inbuff  = new double[1 * rxa->dsp_insize  * 2]; // (double *) malloc0 (1 * ch.dsp_insize  * sizeof (complex));
@@ -645,10 +647,13 @@ void RXA::xrxa (RXA *rxa)
     RESAMPLE::xresample (rxa->rsmpout.p);
 }
 
-void RXA::setInputSamplerate (RXA *rxa, int dsp_insize, int in_rate)
+void RXA::setInputSamplerate (RXA *rxa, int in_rate)
 {
     rxa->csDSP.lock();
-    rxa->dsp_insize = dsp_insize;
+    if (in_rate  >= rxa->dsp_rate)
+        rxa->dsp_insize  = rxa->dsp_size * (in_rate  / rxa->dsp_rate);
+    else
+        rxa->dsp_insize  = rxa->dsp_size / (rxa->dsp_rate /  in_rate);
     rxa->in_rate = in_rate;
     // buffers
     delete[] (rxa->inbuff);
@@ -665,10 +670,13 @@ void RXA::setInputSamplerate (RXA *rxa, int dsp_insize, int in_rate)
     rxa->csDSP.unlock();
 }
 
-void RXA::setOutputSamplerate (RXA *rxa, int dsp_outsize, int out_rate)
+void RXA::setOutputSamplerate (RXA *rxa, int out_rate)
 {
     rxa->csDSP.lock();
-    rxa->dsp_outsize = dsp_outsize;
+    if (out_rate >= rxa->dsp_rate)
+        rxa->dsp_outsize = rxa->dsp_size * (out_rate / rxa->dsp_rate);
+    else
+        rxa->dsp_outsize = rxa->dsp_size / (rxa->dsp_rate / out_rate);
     rxa->out_rate = out_rate;
     // buffers
     delete[] (rxa->outbuff);
@@ -680,11 +688,17 @@ void RXA::setOutputSamplerate (RXA *rxa, int dsp_outsize, int out_rate)
     rxa->csDSP.unlock();
 }
 
-void RXA::setDSPSamplerate (RXA *rxa, int dsp_insize, int dsp_outsize, int dsp_rate)
+void RXA::setDSPSamplerate (RXA *rxa, int dsp_rate)
 {
     rxa->csDSP.lock();
-    rxa->dsp_insize = dsp_insize;
-    rxa->dsp_outsize = dsp_outsize;
+    if (rxa->in_rate  >= dsp_rate)
+        rxa->dsp_insize  = rxa->dsp_size * (rxa->in_rate  / dsp_rate);
+    else
+        rxa->dsp_insize  = rxa->dsp_size / (dsp_rate /  rxa->in_rate);
+    if (rxa->out_rate >= dsp_rate)
+        rxa->dsp_outsize = rxa->dsp_size * (rxa->out_rate / dsp_rate);
+    else
+        rxa->dsp_outsize = rxa->dsp_size / (dsp_rate / rxa->out_rate);
     rxa->dsp_rate = dsp_rate;
     // buffers
     delete[] (rxa->inbuff);
@@ -731,12 +745,18 @@ void RXA::setDSPSamplerate (RXA *rxa, int dsp_insize, int dsp_outsize, int dsp_r
     rxa->csDSP.unlock();
 }
 
-void RXA::setDSPBuffsize (RXA *rxa, int dsp_insize, int dsp_size, int dsp_outsize)
+void RXA::setDSPBuffsize (RXA *rxa, int dsp_size)
 {
     rxa->csDSP.lock();
-    rxa->dsp_insize = dsp_insize;
+    if (rxa->in_rate  >= rxa->dsp_rate)
+        rxa->dsp_insize  = dsp_size * (rxa->in_rate  / rxa->dsp_rate);
+    else
+        rxa->dsp_insize  = dsp_size / (rxa->dsp_rate /  rxa->in_rate);
+    if (rxa->out_rate >= rxa->dsp_rate)
+        rxa->dsp_outsize = dsp_size * (rxa->out_rate / rxa->dsp_rate);
+    else
+        rxa->dsp_outsize = dsp_size / (rxa->dsp_rate / rxa->out_rate);
     rxa->dsp_size = dsp_size;
-    rxa->dsp_outsize = dsp_outsize;
     // buffers
     delete[](rxa->inbuff);
     rxa->inbuff = new double[1 * rxa->dsp_insize  * 2]; // (double *)malloc0(1 * rxa->dsp_insize  * sizeof(complex));
diff --git a/wdsp/RXA.hpp b/wdsp/RXA.hpp
index 333cff458..02e797044 100644
--- a/wdsp/RXA.hpp
+++ b/wdsp/RXA.hpp
@@ -95,9 +95,6 @@ public:
         RXA_METERTYPE_LAST
     };
 
-    double* inbuff;
-    double* outbuff;
-    double* midbuff;
     int mode;
     double meter[RXA_METERTYPE_LAST];
     QRecursiveMutex* pmtupdate[RXA_METERTYPE_LAST];
@@ -209,20 +206,20 @@ public:
     static RXA* create_rxa (
         int in_rate,                // input samplerate
         int out_rate,               // output samplerate
-        int in_size,                // input buffsize (complex samples) in a fexchange() operation
         int dsp_rate,               // sample rate for mainstream dsp processing
-        int dsp_size,               // number complex samples processed per buffer in mainstream dsp processing
-        int dsp_insize,             // size (complex samples) of the output of the r1 (input) buffer
-        int dsp_outsize,            // size (complex samples) of the input of the r2 (output) buffer
-        int out_size                // output buffsize (complex samples) in a fexchange() operation
+        int dsp_size                // number complex samples processed per buffer in mainstream dsp processing
     );
     static void destroy_rxa (RXA *rxa);
     static void flush_rxa (RXA *rxa);
     static void xrxa (RXA *rxa);
-    static void setInputSamplerate (RXA *rxa, int dsp_insize, int in_rate);
-    static void setOutputSamplerate (RXA *rxa, int dsp_outsize, int out_rate);
-    static void setDSPSamplerate (RXA *rxa, int dsp_insize, int dsp_outsize, int dsp_rate);
-    static void setDSPBuffsize (RXA *rxa, int dsp_insize, int dsp_size, int dsp_outsize);
+    int get_insize() const { return dsp_insize; }
+    int get_outsize() const { return dsp_outsize; }
+    double *get_inbuff() { return inbuff; }
+    double *get_outbuff() { return outbuff; }
+    static void setInputSamplerate (RXA *rxa, int in_rate);
+    static void setOutputSamplerate (RXA *rxa, int out_rate);
+    static void setDSPSamplerate (RXA *rxa, int dsp_rate);
+    static void setDSPBuffsize (RXA *rxa, int dsp_size);
 
     // RXA Properties
     static void SetMode (RXA& rxa, int mode);
@@ -236,6 +233,11 @@ public:
     static void SetPassband (RXA& rxa, double f_low, double f_high);
     static void SetNC (RXA& rxa, int nc);
     static void SetMP (RXA& rxa, int mp);
+
+private:
+    double* inbuff;
+    double* midbuff;
+    double* outbuff;
 };
 
 } // namespace WDSP
diff --git a/wdsp/TXA.cpp b/wdsp/TXA.cpp
index af67eb069..6a414db4b 100644
--- a/wdsp/TXA.cpp
+++ b/wdsp/TXA.cpp
@@ -54,24 +54,26 @@ namespace WDSP {
 TXA* TXA::create_txa (
     int in_rate,                // input samplerate
     int out_rate,               // output samplerate
-    int in_size,                // input buffsize (complex samples) in a fexchange() operation
     int dsp_rate,               // sample rate for mainstream dsp processing
-    int dsp_size,               // number complex samples processed per buffer in mainstream dsp processing
-    int dsp_insize,             // size (complex samples) of the output of the r1 (input) buffer
-    int dsp_outsize,            // size (complex samples) of the input of the r2 (output) buffer
-    int out_size                // output buffsize (complex samples) in a fexchange() operation
+    int dsp_size                // number complex samples processed per buffer in mainstream dsp processing
 )
 {
     TXA *txa = new TXA;
 
     txa->in_rate = in_rate;
     txa->out_rate = out_rate;
-    txa->in_size = in_size;
     txa->dsp_rate = dsp_rate;
     txa->dsp_size = dsp_size;
-    txa->dsp_insize = dsp_insize;
-    txa->dsp_outsize = dsp_outsize;
-    txa->out_size = out_size;
+
+    if (in_rate  >= dsp_rate)
+        txa->dsp_insize  = dsp_size * (in_rate  / dsp_rate);
+    else
+        txa->dsp_insize  = dsp_size / (dsp_rate /  in_rate);
+
+    if (out_rate >= dsp_rate)
+        txa->dsp_outsize = dsp_size * (out_rate / dsp_rate);
+    else
+        txa->dsp_outsize = dsp_size / (dsp_rate / out_rate);
 
     txa->mode   = TXA_LSB;
     txa->f_low  = -5000.0;
@@ -561,7 +563,7 @@ void TXA::destroy_txa (TXA *txa)
     delete txa;
 }
 
-void flush_txa (TXA* txa)
+void TXA::flush_txa (TXA* txa)
 {
     memset (txa->inbuff,  0, 1 * txa->dsp_insize  * sizeof (dcomplex));
     memset (txa->outbuff, 0, 1 * txa->dsp_outsize * sizeof (dcomplex));
@@ -635,10 +637,15 @@ void xtxa (TXA* txa)
     // print_peak_env ("env_exception.txt", txa->dsp_outsize, txa->outbuff, 0.7);
 }
 
-void TXA::setInputSamplerate (TXA *txa, int dsp_insize, int in_rate)
+void TXA::setInputSamplerate (TXA *txa, int in_rate)
 {
     txa->csDSP.lock();
-    txa->dsp_insize = dsp_insize;
+
+    if (in_rate  >= txa->dsp_rate)
+        txa->dsp_insize  = txa->dsp_size * (in_rate  / txa->dsp_rate);
+    else
+        txa->dsp_insize  = txa->dsp_size / (txa->dsp_rate /  in_rate);
+
     txa->in_rate = in_rate;
     // buffers
     delete[] (txa->inbuff);
@@ -651,10 +658,15 @@ void TXA::setInputSamplerate (TXA *txa, int dsp_insize, int in_rate)
     txa->csDSP.unlock();
 }
 
-void TXA::setOutputSamplerate (TXA* txa, int dsp_outsize, int out_rate)
+void TXA::setOutputSamplerate (TXA* txa, int out_rate)
 {
     txa->csDSP.lock();
-    txa->dsp_outsize = dsp_outsize;
+
+    if (out_rate >= txa->dsp_rate)
+        txa->dsp_outsize = txa->dsp_size * (out_rate / txa->dsp_rate);
+    else
+        txa->dsp_outsize = txa->dsp_size / (txa->dsp_rate / out_rate);
+
     txa->out_rate = out_rate;
     // buffers
     delete[] (txa->outbuff);
@@ -672,11 +684,20 @@ void TXA::setOutputSamplerate (TXA* txa, int dsp_outsize, int out_rate)
     txa->csDSP.unlock();
 }
 
-void TXA::setDSPSamplerate (TXA *txa, int dsp_insize, int dsp_outsize, int dsp_rate)
+void TXA::setDSPSamplerate (TXA *txa, int dsp_rate)
 {
     txa->csDSP.lock();
-    txa->dsp_insize = dsp_insize;
-    txa->dsp_outsize = dsp_outsize;
+
+    if (txa->in_rate  >= dsp_rate)
+        txa->dsp_insize  = txa->dsp_size * (txa->in_rate  / dsp_rate);
+    else
+        txa->dsp_insize  = txa->dsp_size / (dsp_rate /  txa->in_rate);
+
+    if (txa->out_rate >= dsp_rate)
+        txa->dsp_outsize = txa->dsp_size * (txa->out_rate / dsp_rate);
+    else
+        txa->dsp_outsize = txa->dsp_size / (dsp_rate / txa->out_rate);
+
     txa->dsp_rate = dsp_rate;
     // buffers
     delete[] (txa->inbuff);
@@ -725,12 +746,21 @@ void TXA::setDSPSamplerate (TXA *txa, int dsp_insize, int dsp_outsize, int dsp_r
     txa->csDSP.unlock();
 }
 
-void TXA::setDSPBuffsize (TXA *txa, int dsp_insize, int dsp_size, int dsp_outsize)
+void TXA::setDSPBuffsize (TXA *txa, int dsp_size)
 {
     txa->csDSP.lock();
-    txa->dsp_insize = dsp_insize;
+
+    if (txa->in_rate  >= txa->dsp_rate)
+        txa->dsp_insize  = dsp_size * (txa->in_rate  / txa->dsp_rate);
+    else
+        txa->dsp_insize  = dsp_size / (txa->dsp_rate /  txa->in_rate);
+
+    if (txa->out_rate >= txa->dsp_rate)
+        txa->dsp_outsize = dsp_size * (txa->out_rate / txa->dsp_rate);
+    else
+        txa->dsp_outsize = dsp_size / (txa->dsp_rate / txa->out_rate);
+
     txa->dsp_size = dsp_size;
-    txa->dsp_outsize = dsp_outsize;
     // buffers
     delete[] (txa->inbuff);
     txa->inbuff = new double[1 * txa->dsp_insize  * 2]; // (double *)malloc0(1 * txa->dsp_insize  * sizeof(complex));
diff --git a/wdsp/TXA.hpp b/wdsp/TXA.hpp
index e6ab30ae8..58b3d578d 100644
--- a/wdsp/TXA.hpp
+++ b/wdsp/TXA.hpp
@@ -124,9 +124,6 @@ public:
         TXA_METERTYPE_LAST
     };
 
-    double* inbuff;
-    double* outbuff;
-    double* midbuff;
     int mode;
     double f_low;
     double f_high;
@@ -223,20 +220,20 @@ public:
     static TXA* create_txa (
         int in_rate,                // input samplerate
         int out_rate,               // output samplerate
-        int in_size,                // input buffsize (complex samples) in a fexchange() operation
         int dsp_rate,               // sample rate for mainstream dsp processing
-        int dsp_size,               // number complex samples processed per buffer in mainstream dsp processing
-        int dsp_insize,             // size (complex samples) of the output of the r1 (input) buffer
-        int dsp_outsize,            // size (complex samples) of the input of the r2 (output) buffer
-        int out_size                // output buffsize (complex samples) in a fexchange() operation
+        int dsp_size                // number complex samples processed per buffer in mainstream dsp processing
     );
     static void destroy_txa (TXA *txa);
     static void flush_txa (TXA *txa);
     static void xtxa (TXA *txa);
-    static void setInputSamplerate (TXA *txa, int dsp_insize, int in_rate);
-    static void setOutputSamplerate (TXA *txa, int dsp_outsize, int out_rate);
-    static void setDSPSamplerate (TXA *txa, int dsp_insize, int dsp_outsize, int dsp_rate);
-    static void setDSPBuffsize (TXA *txa, int dsp_insize, int dsp_size, int dsp_outsize);
+    int get_insize() const { return dsp_insize; }
+    int get_outsize() const { return dsp_outsize; }
+    double *get_inbuff() { return inbuff; }
+    double *get_outbuff() { return outbuff; }
+    static void setInputSamplerate (TXA *txa, int in_rate);
+    static void setOutputSamplerate (TXA *txa, int out_rate);
+    static void setDSPSamplerate (TXA *txa, int dsp_rate);
+    static void setDSPBuffsize (TXA *txa, int dsp_size);
 
     // TXA Properties
     static void SetMode (TXA& txa, int mode);
@@ -251,6 +248,9 @@ public:
 
 private:
     static void ResCheck (TXA& txa);
+    double* inbuff;
+    double* midbuff;
+    double* outbuff;
 };
 
 } // namespace WDSP
diff --git a/wdsp/unit.hpp b/wdsp/unit.hpp
index ee1fafcc2..35d917533 100644
--- a/wdsp/unit.hpp
+++ b/wdsp/unit.hpp
@@ -39,12 +39,10 @@ class WDSP_API Unit
 public:
     int in_rate;                // input samplerate
     int out_rate;               // output samplerate
-    int in_size;                // input buffsize (complex samples) in a fexchange() operation
     int dsp_rate;               // sample rate for mainstream dsp processing
     int dsp_size;               // number complex samples processed per buffer in mainstream dsp processing
-    int dsp_insize;             // size (complex samples) of the output of the r1 (input) buffer
-    int dsp_outsize;            // size (complex samples) of the input of the r2 (output) buffer
-    int out_size;               // output buffsize (complex samples) in a fexchange() operation
+    int dsp_insize;             // size (complex samples) of the input buffer
+    int dsp_outsize;            // size (complex samples) of the output buffer
     QRecursiveMutex csDSP;      // used to block dsp while parameters are updated or buffers flushed
     QRecursiveMutex csEXCH;     // used to block fexchange() while parameters are updated or buffers flushed
     int state;                  // 0 for unit OFF; 1 for unit ON