diff --git a/app/src/main/cpp/sox/CmakeLists.txt b/app/src/main/cpp/sox/CmakeLists.txt
index d094c0e..3458af2 100644
--- a/app/src/main/cpp/sox/CmakeLists.txt
+++ b/app/src/main/cpp/sox/CmakeLists.txt
@@ -112,11 +112,6 @@ set(formats_srcs
         sounder.c
         soundtool.c
         sox-fmt.c
-        u1-fmt.c
-        u2-fmt.c
-        u3-fmt.c
-        u4-fmt.c
-        ul-fmt.c
         voc.c
         vox.c
         vox.h
diff --git a/app/src/main/cpp/sox/formats.h b/app/src/main/cpp/sox/formats.h
index 0a1aa04..d322a1b 100644
--- a/app/src/main/cpp/sox/formats.h
+++ b/app/src/main/cpp/sox/formats.h
@@ -52,11 +52,11 @@
 //  FORMAT(sphere)
 //  FORMAT(svx)
 //  FORMAT(txw)
-  FORMAT(u1)
-  FORMAT(u2)
-  FORMAT(u3)
-  FORMAT(u4)
-  FORMAT(ul)
+//  FORMAT(u1)
+//  FORMAT(u2)
+//  FORMAT(u3)
+//  FORMAT(u4)
+//  FORMAT(ul)
   FORMAT(voc)
   FORMAT(vox)
   FORMAT(wav)
diff --git a/app/src/main/cpp/sox/u1-fmt.c b/app/src/main/cpp/sox/u1-fmt.c
deleted file mode 100644
index f25f39d..0000000
--- a/app/src/main/cpp/sox/u1-fmt.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* libSoX file formats: raw         (c) 2007-8 SoX contributors
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * This library 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 Lesser
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include "sox_i.h"
-#include "raw.h"
-
-RAW_FORMAT4(u1, "u8", "ub", "sou", "fssd", 8, 0, UNSIGNED)
diff --git a/app/src/main/cpp/sox/u2-fmt.c b/app/src/main/cpp/sox/u2-fmt.c
deleted file mode 100644
index 27019d6..0000000
--- a/app/src/main/cpp/sox/u2-fmt.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* libSoX file formats: raw         (c) 2007-8 SoX contributors
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * This library 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 Lesser
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include "sox_i.h"
-#include "raw.h"
-
-RAW_FORMAT2(u2, "u16", "uw", 16, 0, UNSIGNED)
diff --git a/app/src/main/cpp/sox/u3-fmt.c b/app/src/main/cpp/sox/u3-fmt.c
deleted file mode 100644
index 66b7587..0000000
--- a/app/src/main/cpp/sox/u3-fmt.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* libSoX file formats: raw         (c) 2007-8 SoX contributors
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * This library 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 Lesser
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include "sox_i.h"
-#include "raw.h"
-
-RAW_FORMAT1(u3, "u24", 24, 0, UNSIGNED)
diff --git a/app/src/main/cpp/sox/u4-fmt.c b/app/src/main/cpp/sox/u4-fmt.c
deleted file mode 100644
index 28f99fa..0000000
--- a/app/src/main/cpp/sox/u4-fmt.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* libSoX file formats: raw         (c) 2007-8 SoX contributors
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * This library 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 Lesser
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include "sox_i.h"
-#include "raw.h"
-
-RAW_FORMAT1(u4, "u32", 32, 0, UNSIGNED)
diff --git a/app/src/main/cpp/sox/ul-fmt.c b/app/src/main/cpp/sox/ul-fmt.c
deleted file mode 100644
index b876f3e..0000000
--- a/app/src/main/cpp/sox/ul-fmt.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/* libSoX file formats: raw         (c) 2007-8 SoX contributors
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * This library 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 Lesser
- * General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include "sox_i.h"
-#include "raw.h"
-
-RAW_FORMAT(ul, 8, 0, ULAW)