Edit-- right after posting this, it started working. Have no idea why. If i figure it out I’ll update this.
I just build a Picade, and it’s great. The only issue I have is there is no sound from the speakers (no static either). If I plug headphones into the Picade jack, the headphones work. I made sure 3.5 mm jack is selected in RetroPie setup. Volume is 100% when I look in Emulation Station sound settings. I pushed each volume button a bunch of times. Everything seems to be wired correctly. Is there something I’m missing?