The project has made a good progress, but the last problem I have is with DG412DJ analog switch.
There is a little pop-click noise heared on speakers when is switching and is also seen on scope. I tried everything to suppress it with capacitors and resistors, also used another analog switch to close-loop of amplifier before changing source of input, but again without success. Whenever the amp signal is released over analog switch the noise is there.
I read somewhere that optoisolator with MOSFET is a good choice for analog switching as Fairchild H11F1M
If anyone has more experiance and feedback what is the best for audio switching I would be much appreciated.
