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Making a sound mixer

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CalebHansberry:
My brother is into audio electronics, and he was wondering what precisely is it doing to mix the channels? Are the ICs just for amping or something? Also if you have a schematic that'd be cool :D

ClrDraw:
This looks really cool (and complicated :P)! Good work :)

Sorunome:

--- Quote from: CalebHansberry on October 15, 2014, 07:51:23 pm ---My brother is into audio electronics, and he was wondering what precisely is it doing to mix the channels? Are the ICs just for amping or something? Also if you have a schematic that'd be cool :D

--- End quote ---
the ICs are indeed just amps. The key to mixing the channels is to prevent the input of one "going" into the input of another, you can do that by simply putting in resistors before merging them.
And I have a schematic.....ok, keoni made that schematic :P http://img.ourl.ca/schematic1.png
--- Quote from: ClrDraw on October 15, 2014, 07:54:52 pm ---This looks really cool (and complicated :P)! Good work :)

--- End quote ---
Thanks!

Keoni29:
It's basically a bunch of inverting amps with an ajustable resistor in the feedback loop. The outputs of those are then summed by an inverting summing amplifier. The result is all of the channels coming out non-inverted again. (Not that it matters most of the time though.)
The amps make sure there is no crosstalk between channels. I should have made that schematic in CAD software. It looks so ugly

Sorunome:
Haha, but it serves purpose ;)

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