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alsa sound mixing aka dmix (not arts or esd needed)
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charlieg
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PostPosted: Thu Feb 26, 2004 2:54 pm    Post subject: Reply with quote

Hmm, my 'short' config was causing alsa to barf for a couple of games.

Now I've reset it to something more normal, but get this:
Code:
charlie@mightymax charlie $ solarwolf
python: pcm_rate.c:512: snd_pcm_rate_init: Assertion `0' failed.
Aborted


My asount.conf:
Code:
mightymax etc # cat asound.old
pcm.mixer {
  type dmix
  ipc_key 1024
  slave {
    pcm "hw:0,0"
    period_time 0
    period_size 1024
    buffer_size 8192
    rate 44100
  }
}
 
pcm.!default {
  type plug
  slave.pcm "mixer"
}

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TheCoop
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PostPosted: Thu Feb 26, 2004 5:44 pm    Post subject: Reply with quote

get same error, moving /etc/asound.conf and restarting alsasound init script solves it.
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OldTango
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PostPosted: Thu Feb 26, 2004 11:42 pm    Post subject: Reply with quote

I have a question about the kernel itself. I am running the 2.6.3-gentoo-r2 kernel. I have configured it with Alsa and my sound device (SB Audigy XGamer) built in. Do I need to also tell it to use OSS-Emulation as I haven't built that into the kernel. My sound works but not well. and i haven't installed alsa-oss. I am not quite sure what the 2.6.3 kernel needs for proper support.

Please excuse my ignorance here. I am not just a noob on the forum but a total noob to linux.
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charlieg
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PostPosted: Fri Feb 27, 2004 2:04 am    Post subject: Reply with quote

TheCoop wrote:
get same error, moving /etc/asound.conf and restarting alsasound init script solves it.


But that's just working around the problem.

No matter, I've tracked down the reason and the fix and logged it as a bug:
https://bugs.gentoo.org/show_bug.cgi?id=43052

It's a one line patch, a missed break; statement.
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Kymas
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PostPosted: Fri Feb 27, 2004 4:04 am    Post subject: Reply with quote

I have managed to get the dmix plugin working fine for alsa and oss apps but when I run nwn, which uses the SDL library, everything gets extreamly laggy and the game is unplayable. I have tried using the current gentoo version of SDL and I compiled 1.2.6 specifically for nwn. The gentoo version seemed slightly less laggy but was still unplayable.

I am using the onboard nvidia apu for sound output; I believe I read that this is actually just software ac97 in Linux.

If anyone knows any tips to improve performance please let me know.

Thanks,


Kymas
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Shapierian
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PostPosted: Fri Feb 27, 2004 4:30 am    Post subject: Reply with quote

With just about any cofig liek Neik's for example mplayer gives me:

Code:
AF_pre: af format: 2 bps, 2 ch, 44100 hz, little endian signed int
AF_pre: 44100Hz 2ch Signed 16-bit (Little-Endian)
alsa-init: requested format: 44100 Hz, 2 channels, Signed 16-bit (Little-Endian)alsa-init: soundcard set to default
alsa-init: unable to set periodsize: Invalid argument
Could not open/initialize audio device -> no sound.



Is there a work around for this I set xmms to use "default" and "-ao alsa9:default" for mplayer.
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Niek
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PostPosted: Fri Feb 27, 2004 7:24 am    Post subject: Reply with quote

Shapierian wrote:
With just about any cofig liek Neik's for example mplayer gives me:
(...)
Is there a work around for this I set xmms to use "default" and "-ao alsa9:default" for mplayer.
There's a patch for MPlayer to solve this problem. See https://forums.gentoo.org/viewtopic.php?t=124976 and https://bugs.gentoo.org/show_bug.cgi?id=38476 how to solve this.
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charlieg
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PostPosted: Fri Feb 27, 2004 10:08 am    Post subject: Reply with quote

charlieg wrote:
No matter, I've tracked down the reason and the fix and logged it as a bug:
https://bugs.gentoo.org/show_bug.cgi?id=43052

It's a one line patch, a missed break; statement.


The fix was already incorporated in a silent re-release of alsa-1.0.2; if you're afflicted by this problem you need to 'rm /usr/portage/distfiles/alsa-lib-1.0.2.tar.gz' and re-emerge alsa-lib. This should fix it - it worked for me.
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PostPosted: Fri Feb 27, 2004 6:38 pm    Post subject: Multiple sounds work somewhat! Reply with quote

I can play XMMS and hear sounds done using aplay. This works ok as I can now here Gaim sounds when I set the sound method to the command "aplay %s." Is there anyway to make kde's sounds work while playing xmms? Thanks.
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TheCoop
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PostPosted: Fri Feb 27, 2004 7:07 pm    Post subject: Reply with quote

the sound in xine is very crackly when I enable dmix, otherwise it works fine...
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charlieg
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PostPosted: Fri Feb 27, 2004 11:16 pm    Post subject: Reply with quote

Does this make the sound quality awful for totem for anybody else other than me? And it also makes rhythmbox crash...

:cry:
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Niek
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PostPosted: Sat Feb 28, 2004 12:52 pm    Post subject: Re: Multiple sounds work somewhat! Reply with quote

kf_man wrote:
I can play XMMS and hear sounds done using aplay. This works ok as I can now here Gaim sounds when I set the sound method to the command "aplay %s." Is there anyway to make kde's sounds work while playing xmms? Thanks.
Control Center -> Sound & Multimedia -> System Notifications -> Player Settings and enable "Use external player" (just use aplay as command).
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Redeeman
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PostPosted: Sat Feb 28, 2004 9:42 pm    Post subject: Reply with quote

TheCoop wrote:
the sound in xine is very crackly when I enable dmix, otherwise it works fine...


yes, i notice this in pornview :/

and mplayer sometimes plays fast :/
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Redeeman
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PostPosted: Sat Feb 28, 2004 9:42 pm    Post subject: Reply with quote

charlieg wrote:
Does this make the sound quality awful for totem for anybody else other than me? And it also makes rhythmbox crash...

:cry:


you might want to fiddle with the rate parameter, that works on some chips, for example thats needed on my via82xx
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TheCoop
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PostPosted: Sat Feb 28, 2004 10:28 pm    Post subject: Reply with quote

Redeeman wrote:
you might want to fiddle with the rate parameter, that works on some chips, for example thats needed on my via82xx

Fiddle with it how?
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cca93014
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PostPosted: Sun Feb 29, 2004 12:41 pm    Post subject: Reply with quote

I have this working for XMMS, gAIM and mplayer, but I cant get Gnome sounds to play. Any ideas?
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hjlane3
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PostPosted: Sun Feb 29, 2004 11:39 pm    Post subject: Reply with quote

Working great for ALSA apps, but any oss apps that run or are run with aoss sound EXTREMELY crappy... what's wrong?
Code:
pcm.mixer {
  type dmix
  ipc_key 1024

  slave {
    pcm "hw:0,0"
    period_time 0
    period_size 1024
    buffer_size 8192
    rate 44100
  }
}
                                                                                             
pcm.!default {
  type plug
  slave.pcm "mixer"
}

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Redeeman
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PostPosted: Mon Mar 01, 2004 10:33 am    Post subject: Reply with quote

i mean try set rate to 48000, that works on my new via82xx.

with aoss crappy. that might have something to do with the rate too, i am not quite sure. sorry
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Niek
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PostPosted: Tue Mar 02, 2004 6:47 am    Post subject: Reply with quote

*sigh* I upgraded to alsa-lib 1.0.3, and now my sound isn't working with the asound.conf file. Aplay doesn't play anything and MPlayer crashes. Other people with these problems after upgrading?
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cca93014
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PostPosted: Tue Mar 02, 2004 6:58 am    Post subject: Reply with quote

How come people are getting version 1.0.3 of alsa. I just re-synced at got 0.9.8...?
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Niek
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PostPosted: Tue Mar 02, 2004 7:14 am    Post subject: Reply with quote

cca93014 wrote:
How come people are getting version 1.0.3 of alsa. I just re-synced at got 0.9.8...?
I'm using the unstable packages (ACCEPT_KEYWORDS="~x86" in make.conf) instead of the stable.
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hjlane3
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PostPosted: Tue Mar 02, 2004 6:04 pm    Post subject: Reply with quote

Redeeman wrote:
i mean try set rate to 48000, that works on my new via82xx.

with aoss crappy. that might have something to do with the rate too, i am not quite sure. sorry

Ok i did that with my intel8x0
mpg123 mp3 would hog the sound card, not letting anything else use it
aoss mpg123 mp3 worked great!
but rhythmbox run with or w/out it still sound horrible :-(
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PostPosted: Wed Mar 03, 2004 2:05 pm    Post subject: Reply with quote

Well, lets see.... the aplayer multiple sound trick works for me so i guess thats ok. However, im wondering about everything else. The way i see it.... we've had decent enough soundcards for years now so why is such a simple thing like multiple sounds such a pain under linux. Its very poor. I imagine a lot of it is to do with the intel driver. Im using intel8x0 which i've heard is dire. My main machine uses an Nforce board and 5.1 so linux is going nowhere near it.

So.... my question is this. I reckon i understand thi dmix stuff... but how can i get KDE to work with it? The soundsystem selector in the KDE control panel lets me choose Alsa but it doesnt seem to let me play multiple sounds. Im usign kde3.2 witht -arts and +alsa use flagss with a 2.6.2 kernel.

I wonder... if theres a kernel patch for a better intel8x0 or soemthing? Possibly,
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PostPosted: Wed Mar 03, 2004 8:41 pm    Post subject: Reply with quote

hjlane3 wrote:
Redeeman wrote:
i mean try set rate to 48000, that works on my new via82xx.

with aoss crappy. that might have something to do with the rate too, i am not quite sure. sorry

Ok i did that with my intel8x0
mpg123 mp3 would hog the sound card, not letting anything else use it
aoss mpg123 mp3 worked great!
but rhythmbox run with or w/out it still sound horrible :-(


applications only supporting oss should use aoss, but native alsa applications _should_ use alsa output device with device 4100
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PostPosted: Thu Mar 04, 2004 11:51 am    Post subject: Reply with quote

This thread confuse more than it help :(

Anyhow, when I try to use aplay, I get this
Code:
ALSA lib pcm_dmix.c:812:(snd_pcm_dmix_open) unable to open slave
aplay: main:503: audio open error: No such file or directory

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