So I tried to use one of those widely available solid-state relay boards to switch some 12V power, and I found out the hard way that they are not designed to switch DC current. They use some sort of variac that only works when AC voltage is applied. Do I have that right??
So I got this other project where I need to multiplex some audio signals in a mixer board, and I was already planning on using those solid-state relays before I learned all this. If I send audio through these relays, is it going to work as planned? Will I suffer any noticeable delay, signal degradation or attenuation?