Hello there. I am interested in the Unicorn Hat, but I need to use it while playing analog music. The notes on the Unicorn page say “As the HAT uses the PWM hardware and GPIO18, it will interfere with analogue audio playback.”
I am not familiar with the Pi at all but hope you can answer a quick question. Is there some hardware requirement within the Pi to use GPIO18 (for example, if it is the only pin capable of sending control signals to the Unicorn)? Could I possibly drive it from a different Pi I/O pin by making some change in the Pi software? (I understand this will mean I have to use a jumper wire to drive it which is fine in this case).
As a secondary question, do you know if it is possible to put the analog audio signal on an I/O pin? I would like to connect to it directly without needing to insert a plug into the stereo jack.
Thanks so much!