Comments on: 3 channel audio mixer

By: Gito

Gito — Sat, 24 Jul 2010 23:30:15 +0000

I found exactly,the same circuit in elector july/aui\gust 1976.
the use of the switch (S1,S2,S3) is completely to block any unwanted input when switch to ground.nd the value of R4,R8,R12 must have halve the value of R2,R6,R12 that,s 47 Kohm.

Gito

By: marius

marius — Thu, 18 Feb 2010 10:46:06 +0000

You cannot do this, this is not a PC controlled audio mixer, it is just a regular, analogic, mixer.

By: hassan sharif

hassan sharif — Thu, 18 Feb 2010 10:40:39 +0000

hi,

how can i itrface this circuit with my laptop? where i can find the software for controling it from my laoptop?

thanks

By: Brett

Brett — Mon, 15 Jun 2009 15:21:02 +0000

This circuit didn’t look right to me and I’m quite sure it doesn’t work because the bias is wrong. I’ve breadboarded one input section and it doesn’t work. It requires an extra 220K resistor from the bias point to earth and as I see it the PCB cannot be easily modified to work. The PCB needs to be completely re-done.

By: Ron

Ron — Wed, 27 May 2009 22:21:49 +0000

Looks like a perfect spot to add an LED w/current limiting resistor for power on indication (panel mount). This may have been the intent – smaller trace size and parallel to the power supply.