Sound Issues (Crackle) with Enemy Territory, Alsa-OSS and DMIX

hitman_et · 04-11-2006, 08:43 AM

Hi,
I have a onboard intel8x0, and alsa version 1.0.10. Everything is set up including dmix, i can run multiple xmms instances and everything works fine, both using alsa and aoss xmms(oss output).

The problem arises when i try to use Enemy Territory (any quake3 game for that matter), i can only hear glimpses of sound and that crackles pretty bad.
ET startup stuff:

Code:

------- sound initialization -------
------------------------------------
----- Sound Info -----
sound system is muted
    1 stereo
32768 samples
   16 samplebits
    1 submission_chunk
44100 speed
0x0x9716cd0 dma buffer
No background file.
----------------------
Sound memory manager started

Available Sound Options in ET:

Code:

s_stop
  s_info
  s_list
  s_initsound = 1
  s_nocompressed = 0
  s_testsound = 0
  s_show = 0
  s_debugMusic = 0
  s_currentMusic = sound/music/menu_server.wav
  s_mute = 0
  s_channels = 2
  s_bits = 16
  s_wavonly = 0
  s_defaultsound = 0
  s_mixPreStep = 0.05
  s_mixahead = 0.2
  s_khz = 44
  s_doppler = 1
  s_separation = 0.5
  s_musicvolume = 0.5
  s_volume = 0.8

.asoundrc

Code:

# cat ~/.asoundrc
        pcm.intel8x0 {
           type hw
           card 0
        }

        ctl.intel8x0 {
           type hw
           card 0
        }


pcm.dsp {
    type plug
    ipc_gid	501
    ipc_key_add_uid false
    ipc_perm 0777
    slave.pcm "dmix"
}
# mixer0 can stay unchanged, because
# it isn't used anyway, I guess ;)
ctl.mixer0 {
    type hw
    card 0
}

cat /proc/asound/card0/pcm0p/sub0/hw_params

Code:

access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 48000 (48000/1)
period_size: 1024
buffer_size: 16384
tick_time: 4000

Any help is appreciated.
Thanks

Linux.tar.gz · 04-12-2006, 08:36 PM

Try to change s_mixahead.
I also notice that /proc/asound/card0/pcm0p/sub0/hw_params have a 48000 rate, and Available Sound Options in ET have 44000. Maybe you can unlock rate in alsamixer.
And maybe you have to manually start artsd with tweaked options.

hitman_et · 04-12-2006, 09:38 PM

No luck, i tried different speeds in ET, however i can only set 11000, 22000 and 44000.
Couldn't find any difference when changing s_mixahead.

I should be able to change the rate in the .asoundrc file, would this help??

Linux.tar.gz · 04-12-2006, 11:45 PM

Dunno. Try to remove your .asoundrc. Just rename it.
Did you tried to launch your game as root?
Btw, just a link, just in case you don't know this ET mod:
http://truecombat.com/intro.php

hitman_et · 04-12-2006, 11:52 PM

Still no luck

hitman_et · 04-13-2006, 08:23 AM

After some more research I believe the problem lies in the fact that ET uses mmap'ing to access the OSS device files.
Any Ideas?

Linux.tar.gz · 04-13-2006, 05:59 PM

artsdsp -m et

hitman_et · 04-13-2006, 10:57 PM

Nope, i'm not using arts.

Linux.tar.gz · 04-14-2006, 10:00 AM

That's exactly why you should launch et with this command:
artsdsp -m et

hitman_et · 04-14-2006, 08:37 PM

When i do that, it gives, 'Could not open /dev/dsp'.
I can get further with aoss :S

Linux.tar.gz · 04-14-2006, 10:15 PM

Strange. Before do this, launch artsd in another terminal and leave it open.

hitman_et · 04-15-2006, 06:30 AM

Ahh yes finally it worked. So I take it, I need the arts daemon running?

Thanks

Linux.tar.gz · 04-15-2006, 07:56 AM

Good! Yes you need artsd running, which is the default in KDE (bad idea).
Hope to see you soon on true combat.

hitman_et · 04-15-2006, 08:07 AM

I'm getting a 1-2 second audio delay in et.