I am developing a project on a Raspberry Pi 3 B+. I am using the PWM0 channel to send a custom-made IR signal using PiGPIO waves. I gather it might then be possible to use PWM1 for mono audio; is that a correct assessment? How might that work with the onboard audio jack when it's presumably wired up to both channels?
If my project required 2 channel (or better) audio, would the best choice be a USB audio board? Or is there a way to use audio from HDMI without binding up there HDMI port? Or another option I haven't thought of or found yet?
I've been largely unsuccessful finding pi 3 B+ examples and I'm guessing that is because hardware PWM is relatively new in the pi world.
If you have used or know about pi-specific audio boards that might satisfy my need, would you mind adding a link to it?