My voice chat has never worked. When I try to start it, it gives me a message saying "voice chat initialization failed". The error messages seem to suggest that the game is searching for an Alsa device, but in the "audio" section of the gui preferences it says it is using the OSS driver.

My system:
Arch64
OSS4
Other audio applications, such as Mumble, work perfectly.

Errors:

In-game console:
Voice Chat loaded.
Voice Chat failed to initialize: no scHandlerID
Initializing Voice Chat with default settings.
Voice Chat failed to initialize.

Standard Output:
ALSA lib pcm.c:2171:(snd_pcm_open_conf) Cannot open shared library /usr/lib/alsa-lib/libasound_module_pcm_oss.so
ALSA lib pcm.c:2171:(snd_pcm_open_conf) Cannot open shared library /usr/lib/alsa-lib/libasound_module_pcm_oss.so
warning: The VAD has been replaced by a hack pending a complete rewrite

~/.vendetta/errors.log:

wtf!archive returned 0
[Wed Aug 18 23:52:14 2010] Found driver: "Open Sound System driver". Type 1, Version 9.1. Load @0x00f1d9f0
[Wed Aug 18 23:52:14 2010] Instantiate address: 0x7fd57286d010
[Wed Aug 18 23:52:14 2010] Found driver: "OpenGL Reference GKGL driver". Type 5, Version 88.0. Load @0x00f1eb50
[Wed Aug 18 23:52:14 2010] Instantiate address: 0x7fd57264e030
[Wed Aug 18 23:52:14 2010] Found driver: "ALSA driver". Type 1, Version 9.1. Load @0x00f1fd70
[Wed Aug 18 23:52:14 2010] Instantiate address: 0x7fd571fbb7c0
ALSA: cannot open audio device default (No such file or directory)
osssound: ospace info: fragment=0010000a fragstotal=16, fragsize=1884
OSS sound initialized: 44100Hz, 16bit stereo, 170ms buffer using /dev/dsp
[Wed Aug 18 23:52:15 2010] load_sample_ogg: Couldn't open sound/mission.updated.ogg (mission.updated)
[Wed Aug 18 23:52:15 2010] load_sample: Couldn't open sound/mission.updated.ogg (mission.updated)
[Wed Aug 18 23:52:15 2010] load_sample_ogg: Couldn't open sound/nfz.warning.enter.ogg (nfz.warning.enter)
[Wed Aug 18 23:52:15 2010] load_sample: Couldn't open sound/nfz.warning.enter.ogg (nfz.warning.enter)
[Wed Aug 18 23:52:15 2010] load_sample_ogg: Couldn't open sound/nfz.warning.leave.ogg (nfz.warning.leave)
[Wed Aug 18 23:52:15 2010] load_sample: Couldn't open sound/nfz.warning.leave.ogg (nfz.warning.leave)
/dev/js0: No such file or directory
/dev/input/js0: No such file or directory
/dev/js1: No such file or directory
/dev/input/js1: No such file or directory
/dev/js2: No such file or directory
/dev/input/js2: No such file or directory
/dev/js3: No such file or directory
/dev/input/js3: No such file or directory
Found 0 joystick(s)
allocated pipes: 11->10, 13->12
[Wed Aug 18 23:52:31 2010] Flight-Assist mode disabled.
[Wed Aug 18 23:52:31 2010] Auto-Aim enabled.
Voice Chat loaded.
Error opening playback device: 0x00000907Voice Chat failed to initialize: no scHandlerID
Initializing Voice Chat with default settings.
Error opening playback device: 0x00000907Voice Chat failed to initialize.

Thanks.

I'm not sure if anyone actually ran the game with oss4 before.

Might be a teamspeak or fmod issue. Even the beta ts3 client doesn't seem to work with oss4. I only tried it in in VirtualBox though.

Doesn't OSS4 have some sort of alsa emulation?

If you want a dev response you should probably file a support request, they don't check this forum all that often.