2 channels to 1 crosstalk

dreamtear · 17th January 2008, 10:59 PM

I have 2 audio channels that i am trying to merge into 1. The problem i am facing is that they share a common ground, so when isolating one signal it still picks up crosstalk from the other signal. My main goal is to have 2 separate outs of each channel and a mono mixed out.

dave_gerecke · 19th January 2008, 01:42 AM

Quickest way would be to build a buffer amplifier for each channel. No gain, just provide a hi impedance between the two inputs, this should pretty well block crosstalk. If you aren't too picky, using a couple of opamps, or two channels of a single opamp, setup for a gain of 1, tying the outputs of the opamps together, and putting a small series(500-100 ohms) resistance between the opamp outputs and the summing point should work for you.

Peace,

Dave

17th January 2008, 10:59 PM	#1
dreamtear diyAudio Member Join Date: Jan 2008	2 channels to 1 crosstalk I have 2 audio channels that i am trying to merge into 1. The problem i am facing is that they share a common ground, so when isolating one signal it still picks up crosstalk from the other signal. My main goal is to have 2 separate outs of each channel and a mono mixed out.

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19th January 2008, 01:42 AM	#2
dave_gerecke diyAudio Member Join Date: Dec 2007 Location: Vermont	Quickest way would be to build a buffer amplifier for each channel. No gain, just provide a hi impedance between the two inputs, this should pretty well block crosstalk. If you aren't too picky, using a couple of opamps, or two channels of a single opamp, setup for a gain of 1, tying the outputs of the opamps together, and putting a small series(500-100 ohms) resistance between the opamp outputs and the summing point should work for you. Peace, Dave

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