I finished my Picade build yesterday and today I pluggen in the Pi Zero that I got with the Picade. On SD card I put latest RetroPie.
Screen works and also all the controls. But as soon as the Pi Zero boots there is a buzzing sound in speaker that will no go away unless I minimize the volume using the volume down button.
I tried the Doom and Duke Nukem port demo and I get zero sound from speakers, only the buzzing humming sound. Wiring for the speakers is correct (+ and -).
Any ideas what could be the problem?