Haiku developer François Revol has done an initial port of the Open Sound System to Haiku. OSS has been open sourced by 4front Technologies recently, and powers the audio hardware of many Unix derivates.
OSS features an impressive list of supported devices - the port aims to seemlessly integrate with Haiku's media subsystem, the OSS drivers will just work like any other of the currently available audio drivers.
For further information, please refer to this announcement made on the OSS developer mailing list.
[img_assist|nid=1687|title=CDDA-FS running in Haiku|desc=|link=popup|align=right|width=200|height=136]
Haiku developer Axel Dörfler has started to work on a CDDA file system
for playing audio CDs for Haiku. CDDA-FS allows Haiku users to view
and play music tracks from mounted audio CDs as if they were WAV files.
CDDA-FS also supports CD-Text which means that information like album
titles, artist names, and song titles available from the CD itself will
be shown as file attributes, so that they can be viewed and edited in
Tracker.
While CDDA-FS is not finished yet, it can already be used to play back
CD contents as you can see from the screenshot. The file system is
accompanied by a small test application "cdda_text" which also runs
under BeOS and prints all information CDDA-FS can retrieve from the
specified CD.