diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8cc177b3..7801a1534 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -399,7 +399,6 @@ set (wsjt_FSRCS
   lib/morse.f90
   lib/move.f90
   lib/mskdt.f90
-  lib/msk144dt.f90
   lib/msk144d.f90
   lib/msk144_decode.f90
   lib/options.f90
@@ -441,7 +440,6 @@ set (wsjt_FSRCS
   lib/sync9w.f90
   lib/synciscat.f90
   lib/syncmsk.f90
-  lib/syncmsk144.f90
   lib/timer_C_wrapper.f90
   lib/timer_impl.f90
   lib/timer_module.f90
diff --git a/lib/msk144dt.f90 b/lib/msk144dt.f90
deleted file mode 100644
index 1d331ac66..000000000
--- a/lib/msk144dt.f90
+++ /dev/null
@@ -1,78 +0,0 @@
-subroutine msk144dt(d,npts,ty,yellow,nyel)
-
-  parameter (NFFT=1024,NH=NFFT/2)
-  real d(npts)
-  real x(0:NFFT-1)
-  real green(703)
-  real yellow(703)                    !703 = 30*12000/512
-  real ty(703)
-  real y2(175)
-  real ty2(175)
-  integer indx(703)
-  logical ok
-  complex c(0:NH)
-  equivalence (x,c)
-
-  df=12000.0/NFFT
-  i1=nint(300.0/df)
-  i2=nint(800.0/df)
-  i3=nint(2200.0/df)
-  i4=nint(2700.0/df)
-  nblks=npts/NH - 1
-
-  do j=1,nblks
-     ib=(j+1)*NH
-     ia=ib-NFFT+1
-     x=d(ia:ib)
-     call four2a(x,NFFT,1,-1,0)             !r2c FFT
-     sqlow=0.
-     do i=i1,i2
-        sqlow=sqlow + real(c(i))**2 + aimag(c(i))**2
-     enddo
-     sqmid=0.
-     do i=i2,i3
-        sqmid=sqmid + real(c(i))**2 + aimag(c(i))**2
-     enddo
-     sqhigh=0.
-     do i=i3,i4
-        sqhigh=sqhigh + real(c(i))**2 + aimag(c(i))**2
-     enddo
-     green(j)=db(sqlow+sqmid+sqhigh)
-     yellow(j)=db(sqmid/(sqlow+sqhigh))
-     ty(j)=j*512.0/12000.0
-  enddo
-
-  npct=20
-  call pctile(green,nblks,npct,base)
-  green(1:nblks)=green(1:nblks) - base - 0.3
-  call pctile(yellow,nblks,npct,base)
-  yellow(1:nblks)=yellow(1:nblks) - base - 0.6
-  call indexx(yellow,nblks,indx)
-
-  do j=1,nblks/4
-     k=indx(nblks+1-j)
-     ty(j)=ty(k)
-     yellow(j)=yellow(k)
-     if(yellow(j).lt.1.4) exit
-  enddo
-  nyel=j-1
-  k=1
-  y2(1)=yellow(1)
-  ty2(1)=ty(1)
-  do j=2,nyel
-     ok=.true.
-     do i=1,j-1
-        if(abs(ty(i)-ty(j)).lt.0.05) ok=.false.
-     enddo
-     if(ok) then
-        k=k+1
-        y2(k)=yellow(j)
-        ty2(k)=ty(j)
-     endif
-  enddo
-  nyel=k
-  yellow(1:nyel)=y2(1:nyel)
-  ty(1:nyel)=ty2(1:nyel)
-
-  return
-end subroutine msk144dt
diff --git a/lib/syncmsk144.f90 b/lib/syncmsk144.f90
deleted file mode 100644
index 6b48af4ba..000000000
--- a/lib/syncmsk144.f90
+++ /dev/null
@@ -1,357 +0,0 @@
-subroutine syncmsk144(cdat,npts,pchk_file,msgreceived,fest,nutc,t0)  
-!nutc and t0 are for debug output 
-  use iso_c_binding, only: c_loc,c_size_t
-  use packjt
-  use hashing
-  use timer_module, only: timer
-
-  parameter (NSPM=864)
-  character*22 msgreceived
-  character*512 pchk_file,gen_file
-  complex cdat(npts)                    !Analytic signal
-  complex cdat2(npts)
-  complex c(NSPM)
-  complex ctmp(6000)                  
-  complex cb(42)                        !Complex waveform for sync word 
-  complex cfac,cca,ccb
-  complex cc(npts)
-  complex cc1(npts)
-  complex cc2(npts)
-  complex bb(6)
-  integer s8(8),hardbits(144),hardword(128),unscrambledhardbits(128)
-  integer*1, target:: i1Dec8BitBytes(10)
-  integer, dimension(1) :: iloc
-  integer*4 i4Dec6BitWords(12)  
-  integer*1 decoded(80)   
-  integer*1 i1hashdec
-  integer ipeaks(10)
-  logical ismask(6000)
-  real cbi(42),cbq(42)
-  real tonespec(6000)
-  real rcw(12)
-  real dd(npts)
-  real pp(12)                          !Half-sine pulse shape
-  real*8 dt, df, fs, pi, twopi
-  real softbits(144)
-  real*8 unscrambledsoftbits(128)
-  real lratio(128)
-  logical first
-  data first/.true./
-
-  data s8/0,1,1,1,0,0,1,0/
-  save first,cb,pi,twopi,dt,s8,rcw,pp
-
-  if(first) then
-     i=index(pchk_file,".pchk")
-     gen_file=pchk_file(1:i-1)//".gen"
-     call init_ldpc(trim(pchk_file)//char(0),trim(gen_file)//char(0))
-! define half-sine pulse and raised-cosine edge window
-     pi=4d0*datan(1d0)
-     twopi=8d0*datan(1d0)
-     dt=1.0/12000.0
-     do i=1,12
-       angle=(i-1)*pi/12.0
-       pp(i)=sin(angle)
-       rcw(i)=(1-cos(angle))/2
-     enddo
-
-! define the sync word waveform
-     s8=2*s8-1  
-     cbq(1:6)=pp(7:12)*s8(1)
-     cbq(7:18)=pp*s8(3)
-     cbq(19:30)=pp*s8(5)
-     cbq(31:42)=pp*s8(7)
-     cbi(1:12)=pp*s8(2)
-     cbi(13:24)=pp*s8(4)
-     cbi(25:36)=pp*s8(6)
-     cbi(37:42)=pp(1:6)*s8(8)
-     cb=cmplx(cbi,cbq)
-
-     first=.false.
-  endif
-
-! Coarse carrier frequency sync
-! look for tones near 2k and 4k in the (analytic signal)**2 spectrum 
-! search range for coarse frequency error is +/- 100 Hz
-  fs=12000.0
-  nfft=6000      !using a zero-padded fft to get 2 Hz bins
-  df=fs/nfft
-
-  ctmp=cmplx(0.0,0.0)
-  ctmp(1:npts)=cdat**2   
-  ctmp(1:12)=ctmp(1:12)*rcw
-  ctmp(npts-11:npts)=ctmp(npts-11:npts)*rcw(12:1:-1)
-  call four2a(ctmp,nfft,1,-1,1)  
-  tonespec=abs(ctmp)**2 
-
-  ismask=.false.
-  ismask(1901:2101)=.true.  ! high tone search window
-  iloc=maxloc(tonespec,ismask)           
-  ihpk=iloc(1)
-  ah=tonespec(ihpk)
-  ismask=.false.
-  ismask(901:1101)=.true.   ! window for low tone
-  iloc=maxloc(tonespec,ismask)           
-  ilpk=iloc(1)
-  al=tonespec(ilpk)
-  fdiff=(ihpk-ilpk)*df 
-  ferrh=(ihpk-2001)*df/2.0 
-  ferrl=(ilpk-1001)*df/2.0
-  if( abs(fdiff-2000) .le. 16.0 ) then  
-    if( ah .ge. al ) then
-      ferr=ferrh
-    else 
-      ferr=ferrl
-    endif
-  else   
-    msgreceived=' '
-    phase0=-97      !-97 is failed carrier sync, -98 failure to decode, -99 decoded, bad hash
-    niterations=0
-    ndither=0
-    i1hashdec=0
-    fest=0.0
-    i1Dec8BitBytes=0
-    nbadsync1=-1
-    nbadsync2=-1
-    goto 999 
-  endif
- 
-! remove coarse freq error - should now be within a few Hz
-  call tweak1(cdat,npts,-(1500+ferr),cdat)
-
-! attempt frame synchronization
-! correlate with sync word waveforms - the resulting complex
-! correlations provide all synch information.
-  cc=0
-  cc1=0
-  cc2=0
-  do i=1,npts-(56*6+41)
-    cc1(i)=sum(cdat(i:i+41)*conjg(cb))
-    cc2(i)=sum(cdat(i+56*6:i+56*6+41)*conjg(cb))
-  enddo
-  cc=cc1+cc2
-  dd=abs(cc1)*abs(cc2)
-
-! Find 5 largest peaks
-  do ipk=1,5
-    iloc=maxloc(abs(cc))           
-    ic1=iloc(1)
-    iloc=maxloc(dd)           
-    ic2=iloc(1)
-    ipeaks(ipk)=ic2
-    dd(max(1,ic2-7):min(npts-56*6-41,ic2+7))=0.0
-  enddo
-
-! See if we can find "closed brackets" - a pair of peaks that differ by 864, plus or minus
-! This information is not yet used for anything
-!  do ii=1,5
-!    do jj=ii+1,5
-!      if( (ii .ne. jj) .and. (abs( abs(ipeaks(ii)-ipeaks(jj))-864) .le. 5) ) then
-!      write(*,*) "closed brackets: ",ii,jj,ipeaks(ii),ipeaks(jj),abs(ipeaks(ii)-ipeaks(jj))
-!      endif
-!    enddo
-!  enddo
-
-  do ipk=1,5 
-
-! we want ic to be the index of the first sample of the frame
-    ic0=ipeaks(ipk)
-
-! fine adjustment of sync index
-! bb lag used to place the sampling index at the center of the eye
-  do i=1,6
-    if( ic0+11+NSPM .le. npts ) then
-      bb(i) = sum( ( cdat(ic0+i-1+6:ic0+i-1+6+NSPM:6) * conjg( cdat(ic0+i-1:ic0+i-1+NSPM:6) ) )*2 )
-    else
-      bb(i) = sum( ( cdat(ic0+i-1+6:npts:6) * conjg( cdat(ic0+i-1:npts-6:6) ) )*2 )
-    endif
-  enddo
-  iloc=maxloc(abs(bb))
-  ibb=iloc(1)
-  bba=abs(bb(ibb))
-  if( ibb .le. 3 ) ibb=ibb-1
-  if( ibb .gt. 3 ) ibb=ibb-7
-  do id=1,3             ! slicer dither 
-    if( id .eq. 1 ) is=0
-    if( id .eq. 2 ) is=-1
-    if( id .eq. 3 ) is=1
-! Adjust frame index to place peak of bb at desired lag
-  ic=ic0+ibb+is
-  if( ic .lt. 1 ) ic=ic+864
-
-! Estimate fine frequency error. 
-! Should a larger separation be used when frames are averaged?
-  cca=sum(cdat(ic:ic+41)*conjg(cb))
-  if( ic+56*6+41 .le. npts ) then
-    ccb=sum(cdat(ic+56*6:ic+56*6+41)*conjg(cb))
-    cfac=ccb*conjg(cca)
-    ferr2=atan2(imag(cfac),real(cfac))/(twopi*56*6*dt)
-  else
-    ccb=sum(cdat(ic-88*6:ic-88*6+41)*conjg(cb))    
-    cfac=cca*conjg(ccb)
-    ferr2=atan2(imag(cfac),real(cfac))/(twopi*88*6*dt)
-  endif
-
-! Final estimate of the carrier frequency - returned to the calling program
-  fest=1500+ferr+ferr2
-! Remove fine frequency error
-  call tweak1(cdat,npts,-ferr2,cdat2)
-
-! place the beginning of frame at index NSPM+1
-  cdat2=cshift(cdat2,ic-(NSPM+1))
-
-  do iav=1,7  
-! Try each of the three frames individually, and then
-! do frame averaging on passes 4 and 5
-if( 0 .eq. 1 ) then
-  if( iav .eq. 1 ) then
-    c=cdat2(1:NSPM)
-  elseif( iav .eq. 2 ) then
-    c=cdat2(NSPM+1:2*NSPM)
-  elseif( iav .eq. 3 ) then
-    c=cdat2(2*NSPM+1:npts)
-  elseif( iav .eq. 4 ) then
-    c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
-  elseif( iav .eq. 5 ) then
-    c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
-  elseif( iav .eq. 6 ) then
-    c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
-  elseif( iav .eq. 7 ) then
-    c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
-  elseif( iav .eq. 8 ) then
-    c=cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
-  elseif( iav .eq. 9 ) then
-    c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
-  endif 
-endif
-
-  if( iav .eq. 1 ) then
-    c(1:NSPM)=cdat2(NSPM+1:2*NSPM)  !avg 1 frame to the right of ic
-  elseif( iav .eq. 2 ) then
-    c=cdat2(NSPM-431:NSPM+432)      !1 frame centered on ic
-    c=cshift(c,-432)
-  elseif( iav .eq. 3 ) then         !1 frame to the left of ic
-    c=cdat2(1:NSPM)
-  elseif( iav .eq. 4 ) then
-    c=cdat2(NSPM+432:NSPM+432+863)  !1 frame beginning 36ms to the right of ic
-    c=cshift(c,432)
-  elseif( iav .eq. 5 ) then
-    c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
-  elseif( iav .eq. 6 ) then
-    c=cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
-  elseif( iav .eq. 7 ) then
-    c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
-  endif 
-
-! Estimate final frequency error and carrier phase. 
-  cca=sum(c(1:1+41)*conjg(cb))
-  ccb=sum(c(1+56*6:1+56*6+41)*conjg(cb))
-  cfac=ccb*conjg(cca)
-  ffin=atan2(imag(cfac),real(cfac))/(twopi*56*6*dt)
-  phase0=atan2(imag(cca+ccb),real(cca+ccb))
-
-  cfac=cmplx(cos(phase0),sin(phase0))
-  c=c*conjg(cfac)
-
-! sample to get softsamples
-!  do i=1,72
-!    softbits(2*i-1)=imag(c(1+(i-1)*12))
-!    softbits(2*i)=real(c(7+(i-1)*12))  
-!  enddo
-
-! matched filter
-  softbits(1)=sum(imag(c(1:6))*pp(7:12))+sum(imag(c(864-5:864))*pp(1:6))
-  softbits(2)=sum(real(c(1:12))*pp)
-  do i=2,72
-    softbits(2*i-1)=sum(imag(c(1+(i-1)*12-6:1+(i-1)*12+5))*pp)
-    softbits(2*i)=sum(real(c(7+(i-1)*12-6:7+(i-1)*12+5))*pp)
-  enddo
-
-  hardbits=0
-  do i=1,144
-    if( softbits(i) .ge. 0.0 ) then
-      hardbits(i)=1
-    endif
-  enddo 
-  nbadsync1=(8-sum( (2*hardbits(1:8)-1)*s8 ) )/2
-  nbadsync2=(8-sum( (2*hardbits(1+56:8+56)-1)*s8 ) )/2 
-  nbadsync=nbadsync1+nbadsync2
-  if( nbadsync .gt. 4 ) cycle
-
-! this could be used to count the number of hard errors that were corrected
-  hardword(1:48)=hardbits(9:9+47)  
-  hardword(49:128)=hardbits(65:65+80-1)  
-  unscrambledhardbits(1:127:2)=hardword(1:64) 
-  unscrambledhardbits(2:128:2)=hardword(65:128) 
-
-! normalize the softsymbols before submitting to decoder
-  sav=sum(softbits)/144
-  s2av=sum(softbits*softbits)/144
-  ssig=sqrt(s2av-sav*sav)
-  softbits=softbits/ssig
-
-  sigma=0.65
-  lratio(1:48)=softbits(9:9+47)
-  lratio(49:128)=softbits(65:65+80-1)
-  lratio=exp(2.0*lratio/(sigma*sigma))
-  
-  unscrambledsoftbits(1:127:2)=lratio(1:64) 
-  unscrambledsoftbits(2:128:2)=lratio(65:128) 
-
-  max_iterations=20
-  max_dither=50
-  call ldpc_decode(unscrambledsoftbits, decoded, max_iterations, niterations, max_dither, ndither)
-
-  if( niterations .ge. 0.0 ) then
-    goto 778
-  endif
-
-enddo
-enddo
-enddo
-
-msgreceived=' '
-phase0=-98
-i1hashdec=0
-goto 999
-
-778 continue
-! The decoder found a codeword - compare decoded hash with calculated
-! Collapse 80 decoded bits to 10 bytes. Bytes 1-9 are the message, byte 10 is the hash
-    do ibyte=1,10   
-      itmp=0
-      do ibit=1,8
-        itmp=ishft(itmp,1)+iand(1,decoded((ibyte-1)*8+ibit))
-      enddo
-      i1Dec8BitBytes(ibyte)=itmp
-    enddo
-
-! Calculate the hash using the first 9 bytes.
-    ihashdec=nhash(c_loc(i1Dec8BitBytes),int(9,c_size_t),146)
-    ihashdec=2*iand(ihashdec,255)
-
-! Compare calculated hash with received byte 10 - if they agree, keep the message.
-    i1hashdec=ihashdec
-
-    if( i1hashdec .eq. i1Dec8BitBytes(10) ) then
-! Good hash --- unpack 72-bit message
-      do ibyte=1,12
-        itmp=0
-        do ibit=1,6
-          itmp=ishft(itmp,1)+iand(1,decoded((ibyte-1)*6+ibit))
-        enddo
-        i4Dec6BitWords(ibyte)=itmp
-      enddo
-      call unpackmsg(i4Dec6BitWords,msgreceived)
-    else
-      msgreceived=' '
-      phase0=-99
-    endif
-
-999 continue
-!    write(78,1001) nutc,t0,iav,ipk,is,fdiff,fest,ffin,nbadsync1,nbadsync2, &
-!               phase0,niterations,ndither,i1hashdec,i1Dec8BitBytes(10),msgreceived 
-!1001 format(i6,f8.2,i4,i4,i4,f8.2,f8.2,f8.2,i4,i4,f8.2,i4,i4,i4,i4,2x,a22)
-
-    return
-end subroutine syncmsk144