Everything looks good in alsamixer, as far as I can tell. How to I
check/change how the input is panned? I still think it's strange that
one shows up as a "stereo" input even if it is truly just mono on L&R,
while the other shows as "mono".
Any tips on panning?
Also, as an added bonus I noticed the existing (integrated/PCI)
soundcard is not working properly since I installed the Mobilepre. If I
try to play something I get a couple slpit seconds of choppy audio and
then it just freezes whatever is playing and stops.
David Slimp wrote:
Well, I'm not familiar with the amixer output, so perhaps someone else
can give a better answer... however, my FIRST thoughts are:
1) I don't know of any single microphones that are stereo, after all
it's a single mic (input).. how would you be getting two different sounds?
2) Just because a signal is heard on left AND right headphones does
not mean the sound is stereo. It just means the mono signal is panned
in the center... so you get the same sound/signal sent to both L/R.
3) Your second mic/input is probably panned fully to the right, so you
could try to pan it to the center, which is probably what you're looking for.
Have you tried running alsamixer ?
Do the volume settings look good there?
David
On 2/16/06, Joshua Cowles <[EMAIL PROTECTED]> wrote:
Well, after a LOT of mostly ALSA-unrelated tinkering, I finally have my
M-Audio Mobilepre USB set up.
For the unfamilar:
http://www.m-audio.com/products/en_us/MobilePreUSB-main-1.html
BUT, it's still not quite right. The first microphone is stereo. (Channel
1) is stereo, I can hear it in both ears when listening to the monitor
headphones. Channel 2, however, is mono! I can only hear it in my right
ear. amixer spits out the following:
$ amixer -c 1
Simple mixer control 'PCM',0
Capabilities: pvolume cvolume pswitch pswitch-joined cswitch cswitch-joined
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31 Capture 0 - 31
Front Left: Playback 29 [94%] [on] Capture 29 [94%] [on]
Front Right: Playback 29 [94%] [on] Capture 29 [94%] [on]
Simple mixer control 'PCM',1
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 1
Mono: 1 [100%]
Simple mixer control 'Speaker',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 30 [97%] [on]
Front Right: Playback 30 [97%] [on]
Simple mixer control 'Speaker',1
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 29 [94%] [on]
Front Right: Playback 29 [94%] [on]
I think that PCM,1 is supposed to be the second microphone input channel,
which makes sense because it's listed as Mono. So it's definitely a
settings/driver problem rather than hardware like a loose connection or
something.
So my question is two fold:
1) Any idea what is going on here? Why is it mono?
2) More importantly, is there any way I can change it to be stereo like
the other microphone?
Any ideas, suggestions, whatever would be greatly appreciated. I'm not
sure what else to do at this point. I really need some help.
Thanks,
Josh
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