Hi,

What you are asking to do is the very definition of a audio mixer. Here is a very tiny passive audio mixer. Little Bear MC5 Mini Portable Stereo 4 Channel Audio Mixer Passive Live Studio Console Recording Low Noise (No Power Needed) $30 dollars. At least with Amazon you can send it back if you don't like it. It has 3.5 mm inputs and outputs. Fits in the palm of your hand. It would require a cable from each device.

https://www.amazon.com/s?k=tiny+audio+mixer&crid=ABAPLCBTR68U&sprefix=tiny+audio+%2Caps%2C198&ref=nb_sb_ss_midas-iss-sm_3_11

There are some two channel ones from China for around $13 dollars but they need battery power and it is a bit hard to understand how they work without a schematic.

This web site shows how to build one so you can see that it is not a simple thing to do.

https://www.circuitlib.com/index.php/tutorials/product/39-how-to-build-an-audio-mixer

I am assuming stereo coming out of both of your devices.

There may be other ways to do what you are asking for that I don't know about. Video Track may know a better answer.

Billy

EDIT: After reading your post a couple of more times I am not sure just what you are trying to do. Please explain.

Last edited by Planobilly; 07/10/21 08:49 AM.
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