When using the examples here: https://circuitpython.readthedocs.io/en/latest/shared-bindings/audiobusio/PDMIn.html I get the following error using RC1 of CircuitPython 2.0:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: Invalid clock pin

I notice that the argument order for instantiating the PDMIn class has changed (MICROPHONE_CLOCK used to come first). Can you confirm that the signature for __init__ is not going to change further?