Disallow identical AudioOut channel pins. Work around ESP-IDF ESP32-S2 bug that swaps DAC channels randomly. #10182
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…2 bug that swaps DAC channels randomly. - Fixes adafruit#10003. Stumbled on espressif/esp-idf#11425 bug while testing. It causes the left and right channels to be swapped randomly on play, which was very confusing. Worked around by forcing a deinit/init on each play. Also got confused because board.A0 and board.A1 are not consistently assigned to left/right channels. Added a documentation warning about this.
eightycc
approved these changes
Mar 26, 2025
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Stumbled on espressif/esp-idf#11425 bug while testing. It causes the left and right channels to be swapped randomly on play, which was very confusing. Worked around by forcing a deinit/init on each play.
I also got confused because board.A0 and board.A1 are not consistently assigned to left/right channels. Added a documentation warning about this.
Shuffled code around a little in
ports/espressif/common-hal/audioio/AudioOut.cto allow calling internal routines instead of common_hal routines.Useful short test audio file: Spoken words "left channel", "right channel", "both channels":
left-right-longer-22050.wav.zip
FYI @MarshallMiller