Index: uspace/lib/pcm/src/format.c
===================================================================
--- uspace/lib/pcm/src/format.c	(revision 5a6f36289e791e8c0fba0a195e7803910a67bcfa)
+++ uspace/lib/pcm/src/format.c	(revision 1912b4519763bcbb573d6ccbc668efc042d978fa)
@@ -75,4 +75,5 @@
 #define to(x, type, endian) (float)(host2 ## type ## _ ## endian(x))
 
+/** Default linear PCM format */
 const pcm_format_t AUDIO_FORMAT_DEFAULT = {
 	.channels = 2,
@@ -81,4 +82,7 @@
 	};
 
+/** Special ANY PCM format.
+ * This format is used if the real format is no know or important.
+ */
 const pcm_format_t AUDIO_FORMAT_ANY = {
 	.channels = 0,