alsa question

Steve Holmes steve at
Mon Mar 10 15:46:11 EST 2003

To start with, I am using RC6 of the ALSA stuff in case it makes a
difference.  I have to use the words cap and nocap to turn capture on
and off respectively.  I know, the docs and limitted help messages say
"capture".  I learned that little bit when talking to Gene here on the
reflector one day a while back.  That has worked well for me.  Also,
note that if the device 'Mix' is captured, you can then have all your
input chanels available for recording/streaming (that is, if you
actually want that).  The Mix capture does prove interesting.  When
chosen, the various *OUTPUT* volume and muting controls do affect what
goes into that mixer chanel.  That's quite different from using the
capture volumes on the previously captured device.

Hope this isn't too confusing.

On Mon, Mar 10, 2003 at 07:59:30PM +1100, Shaun Oliver wrote:
> hi there,
> whenever I try to turn the capture off for my mic and the capture
> options with either alsamixer or amixer,
> I find I can't turn my mic capture off nore once I've turned my capture
> off can I turn it back on.
> this is proving to be a right royal pain as I'm working on a shell
> script to enable someone doing live streaming to be able to do voice
> overs announcements and back announcements with a minimum of fuss.
> basically, all the user need do is type ./vo s in order to talk and ./vo
> m in order to mute the mic and continue playing their music.
> if anyone has found similar problems please let me know how you've
> managed to overcome them.
> thanks in advance.
> oh, I'm using alsa 0.9.0rc7 if that helps any.
> -- 
> Shaun Oliver
> "We're upgrading /dev/null"
> EMAIIL: shaun_oliver at
> ICQ: 76958435
> MSN: blindman_2001 at
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