audioif — the audio hardware layer: the platform drivers under the audio pump.

There is nothing to pip install. audioif is a C module you build into MicroPython 1.29 with audiodsp beside it: clone the two side by side and include both manifests in the manifest your build already uses.

include("/path/to/audiodsp/manifest.py")
include("/path/to/audioif/manifest.py")

The drivers cover ESP32, unix and Windows; other ports skip the module, and the engine runs on one thread with no hardware. micropython-pydevices keeps this pair as its audio.py preset, with boards to build it for. Building it into a firmware has the rest.

>>> import audiopump
>>> audiopump.driver()
'esp32'          # or 'pthread', 'win32', 'none'

import audiobusio, audiocore, board

out = audiobusio.I2SOut(board.GPIO12, board.GPIO13, board.GPIO14)
out.play(sample, loop=True)      # any audiocore sample

'none' means the driver did not link into your build. Once it answers, audiobusio.I2SOut behaves like CircuitPython's: CircuitPython 10.3.0's own I2SOut example runs apart from the three pin names.