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multiple audio sources; controlling volume independently



Hi listers,
Several weeks ago, I discovered one of the joys of software synthesis and ALSA.
I can play music and listen to synthesized speech through the same set of
headphones!
Using emms or emacspeak-m-player, one can do all of this from a running emacs!
There's a slight problem with this setup: the music often drowns the
synthesizer.
Today I found a solution on the ALSA wiki.  You create a "softvol" device,
and route the media player's output through it.  Then, you can set the
volume of the softvol device independently of the synth.
Has anyone else dealt with this issue?  How did you solve it?

-- Chris

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