On 10/03/2006, at 5:55 AM, Derek Piper wrote: > > 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
Derek, I see this regularly (every few seconds) on one of our desktop nodes, but it doesn't seem to adversely affect the audio. I was using that node at the Town Hall meeting yesterday. I gather my audio was a bit high at first, but apart from that it is an example of audio working well despite that error message. On the other hand, my sound card uses a different chip and I'm using ANL rat, so maybe the underlying error being flagged is somehow different despite producing the same error message. chris > > 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 - [email protected] - (812) 856 0111 > IRI 323, School of Informatics > Indiana University, Bloomington, Indiana > Christoph Willing +61 7 3365 8350 QPSF Access Grid Manager University of Queensland
