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2

Based on correspondence with the poster (see comments), it turned out that the sound card was muted inside pavucontrol.


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Here's one way to do it from ~/.asoundrc ; example shows an on-board and soundblaster live card united under the default PCM. # duplicate audio to both devices pcm.!default plug:both ctl.!default { type hw card SB } pcm.both { type route; slave.pcm { type multi; slaves.a.pcm "sblive"; slaves.b.pcm "onboard"; slaves.a....


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You want to use the multi-plugin. Several well documented examples of its use exist: From the alsa people: http://alsa.opensrc.org/TwoCardsAsOne From somebody with a similar question here: http://unix.stackexchange.com/a/194631/127903


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The best way that I've seen is by adding the -l flag to silence as follows: sox in.wav out6.wav silence -l 1 0.1 1% -1 2.0 1% I've copied this command from Example 6 of this very useful blog post called The Sox of Silence


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I asked this same question here: http://raspberrypi.stackexchange.com/questions/50596/how-to-change-audio-levels-of-sound-card-with-same-control-names and got the answer from CL. Use amixer -c2 controls to list all the low-level controls. Then you can use amixer -c2 cset .. to select specific controls by their unique ID number. Running the ...


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I found this solution on a blog to work on my Debian Jessie / XFCE machine. In brief, the problem seems to be a missing "gstreamer0.10-pulseaudio" package. This causes a behavior where you can mute all audio using the keyboard button, but to unmute it you have to go into alsamixer and press M to unmute; the unmute action apparently doesn't get ...



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