Mixing 4 audio channels to 3?
With R12 cranked down to minimum R the output of U3 goes down to about
600µVPP out with 2VPP out of the sound card(s), and up to about 6VPP
with R12 at 10k so, if you use a 10k pot for R12, there's your center
channel volume control.
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JF
Yeah, R12 needs to be a pot. That does it.
Thanks!
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