[Alsa-user] problems with snd-ca0106

[Wojtek K. <woj...@to...>]

hello,

i've search the recent posts for a similar case, but unfortunately i
haven't found any solution.

i bought an Audigy LS card last week, as i found that it's supported by 
ALSA 1.0.8. at the beginning everything seemed to work fine, but as i 
tried to use diffrent software, i've encountered some playback problems.

1) playback through OSS emulation is broken for sample rates different
    than 48kHz. the sound is jerky, there are some audible clicks.
    playback is faster, but pitch isn't changed, so it looks like some
    buffer is shorter than it should be. i've checked: wavplay, mplayer
    and sox with sample rates: 48kHz (works fine), 32kHz, 24kHz, 8kHz,
    44100Hz, 22010Hz, 11025Hz.

2) playback through ALSA is broken in some applications, but it's fine
    with aplay. i fully understand that this could be caused by improper
    use for libasound by those applications, but somehow other soundcards
    i owned (intel8x0, ens1371) never caused any troubles.

2a) XMMS and beep-media-player behave in a similar way as with OSS
     output -- the sound is jerky. this can be avoided by changing
     advanced properties of the output plugin: period length from 500ms
     to some smaller value, 20ms for example. unfortunately it causes the
     sound to skip under heavier load.

2b) Mozilla Thunderbird plays the new mail notification sound just like
     the others, but unfortunately it not possible to tweak any settings.

2c) mplayer however manages to play some sample rates properly with alsa
     output plugin. 44100Hz and 48kHz work fine. 22050 and 24kHz seem
     fine too, but there are quiet clicks in the backgrounds. 32kHz,
     11025Hz, 8kHz are jerky and are impossible to listen.

first i've copied alsa-kernel/ tree to 2.6.10 kernel sources to get 
snd-ca0106 module, but i also checked vanilla 2.4.28 with ALSA compiled 
separately.

so is there any possibility to overcome these problems without patching 
every applications that uses libasound in a different way that aplay 
does? and is it possible to fix OSS emulation? if some tests need to be 
done, i'm willing to check any driver patches and/or use CVS version of 
both alsa-drivers and alsa-lib.

thanks in advance for any suggestions.

btw, `lspci -v' output is:

02:04.0 Multimedia audio controller: Creative Labs: Unknown device 0007
         Subsystem: Creative Labs: Unknown device 1002
         Flags: bus master, medium devsel, latency 32, IRQ 18
         I/O ports at 9800 [size=32]
         Capabilities: [dc] Power Management version 2

02:04.1 Input device controller: Creative Labs: Unknown device 7005
         Subsystem: Creative Labs: Unknown device 1002
         Flags: bus master, medium devsel, latency 32
         I/O ports at 9c00 [size=8]
         Capabilities: [dc] Power Management version 2

regards,
wojtek