Subject: Re: [linux-audio-dev] mixer question
From: Chris Baugher (baugher_AT_enteract.com)
Date: Wed Apr 05 2000 - 05:04:15 EEST
On Tue, 4 Apr 2000, Erik Steffl wrote:
> I have a following question about the mixer:
> in the other OS I can set up separate volumes for recording and
> playback, so I can record from line, do some real time processing and
> hear it on the output (only the result of the processing, NOT the signal
> that goes into line-in).
> however, the linux mixer (at least OSS) does only have one volume
> settings and no matter what I did I was not able to get the recorded
> signal recorded but not heard on the output...
>
> any ideas why is it that way? is alsa different?
I don't use OSS so I can't help with that. I do know that you can do this
with the alsa drivers. For one thing different sound cards have different
mixer behavior so you may have to play with the mixer settings a little.
With my Creative AudioPCI(ens1371) I would:
1) set the master volume level
2) set PCM level and unmute
3) set the line input to capture(record)
4) set the line input level
5) mute the line input ( this keeps the input signal from going to the
line out )
As far as the different levels for playback and record I'm not sure. ALSA
doesn't seem to have this but I don't know why.
Chris|
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