On 01/16/2012 07:11 PM, Mark LaPierre wrote:
> Hey guys,
>
> I have a mic plugged into my sound card. It worked late last night but
> not today. When I try to select the mic using System/Preferences/Sound
> I'm provided with several options to choose from.
>
> On the Hardware tab I choose the Internal Audio device and set it to
> Analog Stereo Duplex.
>
> On the Input tab I choose Internal Audio Analog Stereo there are two
> Analog Microphone Inputs, 1 and 2, to choose from. Each of those inputs
> has Microphone 1 and 2 to choose from.
>
> When I try to record from the mic in Audacity I get a flat signal if I
> choose Input 1 no matter which Microphone, 1 or 2, I choose.
>
> If I choose Input 2, no matter which Microphone I choose, the wave form
> freezes until I return the selection to Input 1.
>
> alsamixer -c0 does not indicate any input settings being muted. In fact
> its indications change in response to changes in Sound Preferences and
> Sound Preferences indications change in response to changes in alsamixer
> -c0.
>
> CentOS 6.2
>
> Advanced Linux Sound Architecture Driver Version 1.0.21
>
> /proc/asound/cards
> 0 [V8237 ]: VIA8237 - VIA 8237
> VIA 8237 with ALC655 at 0xd400, irq 22
>
> /proc/asound/devices
> 2: : timer
> 3: : sequencer
> 4: [ 0- 1]: digital audio playback
> 5: [ 0- 1]: digital audio capture
> 6: [ 0- 0]: digital audio playback
> 7: [ 0- 0]: digital audio capture
> 8: [ 0] : control
> 9: [ 1- 0]: digital audio capture
> 10: [ 1] : control
> 11: [ 2- 0]: digital audio playback
> 12: [ 2- 0]: digital audio capture
> 13: [ 2] : control
>
> /proc/asound/pcm
> 00-00: VIA 8237 : VIA 8237 : playback 4 : capture 1
> 00-01: VIA 8237 : VIA 8237 : playback 1 : capture 1
> 01-00: USB Audio : USB Audio : capture 1
> 02-00: USB Audio : USB Audio : playback 1 : capture 1
>
> I tested the mic by plugging it into my wife's XP machine. The mic
> works fine but the XP machine doesn't.
>
> Very frustrated. Anyone have any idea what else I can check?
>
Alright, I guess I asked the wrong question. Is there a way to probe
the sound card so that I can figure out where in the software chain the
problem is? I suspect an issue with some library file somewhere but I
don't know how to tell what library I hosed up.
--
_
°v°
/(_)\
^ ^ Mark LaPierre
Registerd Linux user No #267004