in Python 3.9 (AttributeError: type object 'array.array' has no attribute 'tostring')

[karu2003]

audiostream/audiostream/sources/wave.pyx

'tostring' > 'tobytes'

[Julian-O]

Restating the problem:

Python's array.array had a tostring() method.
In Python 3.2, it was renamed to tobytes() and the old name was deprecated.
In Python 3.9, tostring() was removed.

Should be an easy fix.