Fixed the noise issue. The hum went away when I used batteries in my blackstar test amp. Also turned off other interference. Will need a lot of shielding. Breadboards and Resistors are magnets for hum. Will definitely need a faraday cage. I also removed the LDR resistors, makes no difference just expensive and I’d have to run a battery charged LED which is unnecessary, causes mores points of failure. The resistors have a max resistance of 10.75M ohms. I can probably lower this a little more.

The great part about this is you don’t get the popping from cutting audio source with a typical killswitch. With a Normally closed switch the path is normal, when switch engages it kills this path and goes to resistor path that is almost silent. This replicates the Tom Morello style switch with one volume set to low.

Finding normally closed switches will be a pain. I need to upgrade to something probably more durable. I tried so hard to get the normally closed switch to work. But Only worked when pushing the button to get the sound. The guitar would be normally muted. Something I maybe to add with the original circuit. To get two types, You’d prolly need a switch to activate it though.

Really excited I can get pretty clean stutters. Hopefully I can find some quieter normally closed switches. No sure the switch I’m using will last. It seems pretty sturdy though.