Electronics-Salon Balanced Four Stereo Audio Signal Input Selector Relay Module.

all right today's video is going to be about how to switch audio signals let's say you got a couple of different sources maybe an FM radio and a tape deck and you want to feed them into some kind of device which you can select with buttons which one's going to be played but it's stereo output you have a stereo if a left and right of each so you want to be able to select both channels to be to go to the output and that output is also stereo obviously and one way you can think of this is with a a multiplexer or MUX and in the digital world this is used everywhere for to bus digital signals but this paradigm can be applied to analog electronics as well the most basic switch to switch audio or what you know one of the most the basic practical switches I suppose would be a J FET simply turn on its side and if you think about it a J FET is basically like a variable resistor controlled by its