diff --git a/app/src/main/cpp/sox/CmakeLists.txt b/app/src/main/cpp/sox/CmakeLists.txt
index 8e5dbee..cda6d98 100644
--- a/app/src/main/cpp/sox/CmakeLists.txt
+++ b/app/src/main/cpp/sox/CmakeLists.txt
@@ -87,12 +87,7 @@ set(formats_srcs
         adpcms.h
         adpcms.c
         al-fmt.c
-#        cvsd.h
-#        cvsd.c
-#        cvsd-fmt.c
         coreaudio.c
-        dat.c
-#        dvms-fmt.c
         f4-fmt.c
         f8-fmt.c
         g711.h
diff --git a/app/src/main/cpp/sox/dat.c b/app/src/main/cpp/sox/dat.c
deleted file mode 100644
index b014f23..0000000
--- a/app/src/main/cpp/sox/dat.c
+++ /dev/null
@@ -1,162 +0,0 @@
-/* libSoX text format file.  Tom Littlejohn, March 93.
- *
- * Reads/writes sound files as text.
- *
- * Copyright 1998-2006 Chris Bagwell and SoX Contributors
- * This source code is freely redistributable and may be used for
- * any purpose.  This copyright notice must be maintained.
- * Lance Norskog And Sundry Contributors are not responsible for
- * the consequences of using this software.
- */
-
-#include "sox_i.h"
-#include <string.h>
-
-#define LINEWIDTH (size_t)256
-
-/* Private data for dat file */
-typedef struct {
-    double timevalue, deltat;
-    int buffered;
-    char prevline[LINEWIDTH];
-} priv_t;
-
-static int sox_datstartread(sox_format_t * ft)
-{
-    char inpstr[LINEWIDTH];
-    long rate;
-    int chan;
-    int status;
-    char sc;
-
-    /* Read lines until EOF or first non-comment line */
-    while ((status = lsx_reads(ft, inpstr, LINEWIDTH-1)) != SOX_EOF) {
-      inpstr[LINEWIDTH-1] = 0;
-      if ((sscanf(inpstr," %c", &sc) != 0) && (sc != ';')) break;
-      if (sscanf(inpstr," ; Sample Rate %ld", &rate)) {
-        ft->signal.rate=rate;
-      } else if (sscanf(inpstr," ; Channels %d", &chan)) {
-        ft->signal.channels=chan;
-      }
-    }
-    /* Hold a copy of the last line we read (first non-comment) */
-    if (status != SOX_EOF) {
-      strncpy(((priv_t *)ft->priv)->prevline, inpstr, (size_t)LINEWIDTH);
-      ((priv_t *)ft->priv)->buffered = 1;
-    } else {
-      ((priv_t *)ft->priv)->buffered = 0;
-    }
-
-    /* Default channels to 1 if not found */
-    if (ft->signal.channels == 0)
-       ft->signal.channels = 1;
-
-    ft->encoding.encoding = SOX_ENCODING_FLOAT_TEXT;
-
-    return (SOX_SUCCESS);
-}
-
-static int sox_datstartwrite(sox_format_t * ft)
-{
-    priv_t * dat = (priv_t *) ft->priv;
-    char s[LINEWIDTH];
-
-    dat->timevalue = 0.0;
-    dat->deltat = 1.0 / (double)ft->signal.rate;
-    /* Write format comments to start of file */
-    sprintf(s,"; Sample Rate %ld\015\n", (long)ft->signal.rate);
-    lsx_writes(ft, s);
-    sprintf(s,"; Channels %d\015\n", (int)ft->signal.channels);
-    lsx_writes(ft, s);
-
-    return (SOX_SUCCESS);
-}
-
-static size_t sox_datread(sox_format_t * ft, sox_sample_t *buf, size_t nsamp)
-{
-    char inpstr[LINEWIDTH];
-    int  inpPtr = 0;
-    int  inpPtrInc = 0;
-    double sampval = 0.0;
-    int retc = 0;
-    char sc = 0;
-    size_t done = 0;
-    size_t i=0;
-
-    /* Always read a complete set of channels */
-    nsamp -= (nsamp % ft->signal.channels);
-
-    while (done < nsamp) {
-
-      /* Read a line or grab the buffered first line */
-      if (((priv_t *)ft->priv)->buffered) {
-        strncpy(inpstr, ((priv_t *)ft->priv)->prevline, (size_t)LINEWIDTH);
-        inpstr[LINEWIDTH-1] = 0;
-        ((priv_t *)ft->priv)->buffered=0;
-      } else {
-        lsx_reads(ft, inpstr, LINEWIDTH-1);
-        inpstr[LINEWIDTH-1] = 0;
-        if (lsx_eof(ft)) return (done);
-      }
-
-      /* Skip over comments - ie. 0 or more whitespace, then ';' */
-      if ((sscanf(inpstr," %c", &sc) != 0) && (sc==';')) continue;
-
-      /* Read a complete set of channels */
-      sscanf(inpstr," %*s%n", &inpPtr);
-      for (i=0; i<ft->signal.channels; i++) {
-        SOX_SAMPLE_LOCALS;
-        retc = sscanf(&inpstr[inpPtr]," %lg%n", &sampval, &inpPtrInc);
-        inpPtr += inpPtrInc;
-        if (retc != 1) {
-          lsx_fail_errno(ft,SOX_EOF,"Unable to read sample.");
-          return 0;
-        }
-        *buf++ = SOX_FLOAT_64BIT_TO_SAMPLE(sampval, ft->clips);
-        done++;
-      }
-    }
-
-    return (done);
-}
-
-static size_t sox_datwrite(sox_format_t * ft, const sox_sample_t *buf, size_t nsamp)
-{
-    priv_t * dat = (priv_t *) ft->priv;
-    size_t done = 0;
-    double sampval=0.0;
-    char s[LINEWIDTH];
-    size_t i=0;
-
-    /* Always write a complete set of channels */
-    nsamp -= (nsamp % ft->signal.channels);
-
-    /* Write time, then sample values, then CRLF newline */
-    while(done < nsamp) {
-      sprintf(s," %15.8g ",dat->timevalue);
-      lsx_writes(ft, s);
-      for (i=0; i<ft->signal.channels; i++) {
-        sampval = SOX_SAMPLE_TO_FLOAT_64BIT(*buf++, ft->clips);
-        sprintf(s," %15.11g", sampval);
-        lsx_writes(ft, s);
-        done++;
-      }
-      sprintf(s," \r\n");
-      lsx_writes(ft, s);
-      dat->timevalue += dat->deltat;
-    }
-    return done;
-}
-
-LSX_FORMAT_HANDLER(dat)
-{
-  static char const * const names[] = {"dat", NULL};
-  static unsigned const write_encodings[] = {SOX_ENCODING_FLOAT_TEXT, 0, 0};
-  static sox_format_handler_t const handler = {SOX_LIB_VERSION_CODE,
-    "Textual representation of the sampled audio", names, 0,
-    sox_datstartread, sox_datread, NULL,
-    sox_datstartwrite, sox_datwrite, NULL,
-    NULL, write_encodings, NULL, sizeof(priv_t)
-  };
-  return &handler;
-}
diff --git a/app/src/main/cpp/sox/formats.h b/app/src/main/cpp/sox/formats.h
index f236cfe..6a528cd 100644
--- a/app/src/main/cpp/sox/formats.h
+++ b/app/src/main/cpp/sox/formats.h
@@ -25,7 +25,7 @@
 //  FORMAT(cdr)
 //  FORMAT(cvsd)
 //  FORMAT(cvu)
-  FORMAT(dat)
+//  FORMAT(dat)
 //  FORMAT(dvms)
   FORMAT(f4)
   FORMAT(f8)