Hey everyone. I simply want to sum a balanced stereo signal to balanced mono. Not sure how best to go about it! Any tips? Thanks!
I would treat the two signals completely seperately and buid two summing amplifers using an opamp to sum the signals at the virtual earth. Then the two ouputs of the opamps become your positive and negative outputs.
To do this configure the opamp in inverting mode and the gain is then equal to Rf / Rin so if you make Rin 2 x Rf you will get a gaiin of 0.5 on each input.
You need to be sure you have enough head room in the power supply and input to the next stage, or you could configure the summing stage to have a gain of 0.5 to ensure that you don't clip.
Regards,
Andrew
To do this configure the opamp in inverting mode and the gain is then equal to Rf / Rin so if you make Rin 2 x Rf you will get a gaiin of 0.5 on each input.
You need to be sure you have enough head room in the power supply and input to the next stage, or you could configure the summing stage to have a gain of 0.5 to ensure that you don't clip.
Regards,
Andrew
Hey thanks for the reply!
Well that would work... but i'm trying to do it purely passively. But i don't want to overload my soundcard either so i'm not sure the best way to go about it.
Well that would work... but i'm trying to do it purely passively. But i don't want to overload my soundcard either so i'm not sure the best way to go about it.
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