Re: Simple line mixer designs

Jean-Yvan Fradet wrote:
(snip)
Yes, I might add potentiometers before the R1 to R3 resistors to control
input level. The design for a passive stereo mixer with pots would then
look like the image at the following link :

http://www.geocities.com/jyfradet/images/Mixer3.png

I need to know if I must add additional resistors or if this
design would be safe.

By the way, if you have a simple design for a do it yourself mixer with
opamps, I might as well go towards that solution.

But the idea behind my initial goal was to avoid adding power supplies
in the first place. It's ok if I lose signal level a bit or if noise is
generated from the resistors. The environment where the device will be
used is noisy anyways...

I am assuming that you want to cross connect various patterns of inputs to various patterns of outputs. This design will cross connect a pair of inputs, if that pair is selected to go to one output. Then if either of those inputs is selected for another output, you will have both of them go there, since they are connected together by the first output setup. Is that effect okay with you?
.

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