[AG-TECH] RAT with Soundblaster Audigy problem

[Derek Piper <dcpiper@indiana.edu>]

	Hi,

	I've been trying to solve the problem of our Linux A/V machine having 
crackly,poppy sound. Turning gain to almost nothing helps alleviate it, 
but it's still there when I play back a recording my sound or meetings 
via AGVCR. Everyone elses sound is fine (i.e. from the townhall), so 
it's not AGVCR. It's a 3Ghz P4, 1GB RAM, running kernel 2.6.15.6 and a 
Soundblaster Live! card. It's running Debian Sarge with ALSA installed 
and the appropriate driver in the kernel (EMU10k). ALSA OSS API support 
is also enabled too.
	I thought I would try using a different soundcard, a Soundblaster 
Audigy to see if that made any difference, but then I was unable to 
start RAT - it failed with a 'elem->type == SND_MIXER_ELEM_SIMPLE' 
failed'' message. I wondered if my RAT was old and didn't support ALSA 
or something, so I compiled the CVS version. Now I get the following 
when I start RAT (it doesn't die, just keeps printing the message with 
no UI)

audio_read: Resource temporarily unavailable

	Googling for this it appears that someone posted about this problem a 
long time ago (2001) and never did a final resolution, or if they did 
they never posted it.

	Anyone have any ideas what the problem could be? I'm thinking that an 
SB Audigy under Linux for AG is probably fairly common so it's probably 
something simply and silly. I'm curious if anyone else has run into this 
problem? Couple of output of some possibly pertinent /proc files added 
below.

	Thanks,

	Derek


[root@iri-av /root]# cat /proc/asound/pcm
00-00: emu10k1 : ADC Capture/Standard PCM Playback : playback 32 : capture 1
00-01: emu10k1 mic : Mic Capture : capture 1
00-02: emu10k1 efx : Multichannel Capture/PT Playback : playback 8 : 
capture 1
00-03: emu10k1 : Multichannel Playback : playback 1
00-04: p16v : p16v : playback 1 : capture 1



[root@iri-av /root]# cat /proc/asound/oss/sndstat
Sound Driver:3.8.1a-980706 (ALSA v1.0.10rc3 emulation code)
Kernel: Linux iri-av 2.6.15.6 #1 PREEMPT Thu Mar 9 14:44:07 EST 2006 i686
Config options: 0

Installed drivers:
Type 10: ALSA emulation

Card config:
Audigy 2 [Unknown] (rev.4, serial:0x10031102) at 0xdf00, irq 20

Audio devices:
0: ADC Capture/Standard PCM Playback (DUPLEX)

Synth devices: NOT ENABLED IN CONFIG

Midi devices:
0: Audigy MPU-401 (UART)

Timers:
7: system timer

Mixers:
0: SigmaTel STAC9721,23


--
Derek Piper - dcpiper@indiana.edu - (812) 856 0111
IRI 323, School of Informatics
Indiana University, Bloomington, Indiana