AUDIO_AIFF_COMM_CHUNK_SIZE
AUDIO_AIFF_COMM_CHUNK_SIZE + sizeof (aiff_ssnd_chunk_t);
offset = sizeof (aiff_hdr_chunk_t) + AUDIO_AIFF_COMM_CHUNK_SIZE +
size = AUDIO_AIFF_COMM_CHUNK_SIZE -
hdr_sizes += AUDIO_AIFF_COMM_CHUNK_SIZE;
(void) memcpy(&buf[buf_size], &comm_chunk, AUDIO_AIFF_COMM_CHUNK_SIZE);
buf_size += AUDIO_AIFF_COMM_CHUNK_SIZE;