Hi!

Back in early 90's (in my teens) i built a soundsystem with 4 speakers
where signal to rear speakers was taken by substracting one stereo
signal from another and routing it to rear speakers in reversed phase.

That is:

Front left speaker has left stereo channel.
Front right has right stereo channel.
Rear left has left stereo channel minus right stereo channel.
Rear right has right stereo channel minus left stereo channel.

I wonder can this setup be done in alsa?

-- 
Markko Merzin


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