Why is output line creating loud buzz through teensy audio shield?

I took of the guitar jack temporarily but can assure I know how to wire one up. I’ve made a pedal with the same ones. I’m powering by 9v to linear regulator to 5v pin.

I know my work may be a little sloppy but I’m experimenting.

It’s supposed to play a simple drum beat but all I get is loud hum. It doesn’t do it when I connect from right channel but right channel doesn’t play the sound I want.

The oled works and it displays Finn’s face from adventure time beatboxing. The pots and button work too.

u/ProfessorPeePee — 20 days ago

Can anybody identify why overdrive isn’t working?

I haven’t added tone or volume yet. I’ve confirmed the guitar input and output work.

u/ProfessorPeePee — 1 month ago