diff --git a/modules/usbaudio/audio_hal.c b/modules/usbaudio/audio_hal.c
index 84cc6430..54314769 100644
--- a/modules/usbaudio/audio_hal.c
+++ b/modules/usbaudio/audio_hal.c
@@ -123,74 +123,6 @@ struct stream_in {
     size_t conversion_buffer_size;      /* in bytes */
 };
 
-/*
- * Data Conversions
- */
-/*
- * Convert a buffer of packed (3-byte) PCM24LE samples to PCM16LE samples.
- *   in_buff points to the buffer of PCM24LE samples
- *   num_in_samples size of input buffer in SAMPLES
- *   out_buff points to the buffer to receive converted PCM16LE LE samples.
- * returns
- *   the number of BYTES of output data.
- * We are doing this since we *always* present to The Framework as A PCM16LE device, but need to
- * support PCM24_3LE (24-bit, packed).
- * NOTE:
- *   This conversion is safe to do in-place (in_buff == out_buff).
- * TODO Move this to a utilities module.
- */
-static size_t convert_24_3_to_16(const unsigned char * in_buff, size_t num_in_samples,
-                                 short * out_buff)
-{
-    /*
-     * Move from front to back so that the conversion can be done in-place
-     * i.e. in_buff == out_buff
-     */
-    /* we need 2 bytes in the output for every 3 bytes in the input */
-    unsigned char* dst_ptr = (unsigned char*)out_buff;
-    const unsigned char* src_ptr = in_buff;
-    size_t src_smpl_index;
-    for (src_smpl_index = 0; src_smpl_index < num_in_samples; src_smpl_index++) {
-        src_ptr++;               /* lowest-(skip)-byte */
-        *dst_ptr++ = *src_ptr++; /* low-byte */
-        *dst_ptr++ = *src_ptr++; /* high-byte */
-    }
-
-    /* return number of *bytes* generated: */
-    return num_in_samples * 2;
-}
-
-/*
- * Convert a buffer of packed (3-byte) PCM32 samples to PCM16LE samples.
- *   in_buff points to the buffer of PCM32 samples
- *   num_in_samples size of input buffer in SAMPLES
- *   out_buff points to the buffer to receive converted PCM16LE LE samples.
- * returns
- *   the number of BYTES of output data.
- * We are doing this since we *always* present to The Framework as A PCM16LE device, but need to
- * support PCM_FORMAT_S32_LE (32-bit).
- * NOTE:
- *   This conversion is safe to do in-place (in_buff == out_buff).
- * TODO Move this to a utilities module.
- */
-static size_t convert_32_to_16(const int32_t * in_buff, size_t num_in_samples, short * out_buff)
-{
-    /*
-     * Move from front to back so that the conversion can be done in-place
-     * i.e. in_buff == out_buff
-     */
-
-    short * dst_ptr = out_buff;
-    const int32_t* src_ptr = in_buff;
-    size_t src_smpl_index;
-    for (src_smpl_index = 0; src_smpl_index < num_in_samples; src_smpl_index++) {
-        *dst_ptr++ = *src_ptr++ >> 16;
-    }
-
-    /* return number of *bytes* generated: */
-    return num_in_samples * 2;
-}
-
 /*
  * Extract the card and device numbers from the supplied key/value pairs.
  *   kvpairs    A null-terminated string containing the key/value pairs or card and device.