Raspberry Pi Pico PWMAudioOut playback has intermittent problems including hanging #4208
Description
Playback is sometimes fine, sometimes accompanied by nasty noise, and occasionally silent with some minor noise. This sort of thing will demonstrate the problems with PWMAudioOut (implemented by #4037):
Adafruit CircuitPython 6.2.0-beta.2-18-g2a467f137 on 2021-02-15; Raspberry Pi Pico with rp2040
>>> import board
>>> from audiopwmio import PWMAudioOut as AudioOut
>>> from audiocore import WaveFile
>>> audio_out = AudioOut(board.GP18, right_channel=board.GP19)
>>> testwav = WaveFile(open("120998-32k.wav", "rb")) ### 32k 16bit stereo 6 seconds
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.play(testwav, loop=True)
>>> audio_out.stop()
>>> audio_out.play(testwav, loop=True)
>>> audio_out.stop()
>>> audio_out.play(testwav)
>>> audio_out.play(testwav)
>>> audio_out.play(testwav)
>>> audio_out.play(testwav)
>>> audio_out.play(testwav)
>>>
soft reboot
Also worth reloading CircuitPython to test again.
Can be seen+heard on Raspberry Pi Pico PWMAudioOut issue I (YouTube).