I suppose the sunau module hasn't received a lot ot love lately :-)

test test_ossaudiodev failed -- Traceback (most recent call last):
  File "/home/antoine/py3k/__svn__/Lib/test/test_ossaudiodev.py", line
146, in test_playback
    sound_info = read_sound_file(findfile('audiotest.au'))
  File "/home/antoine/py3k/__svn__/Lib/test/test_ossaudiodev.py", line
27, in read_sound_file
    au = sunau.open(fp)
  File "/home/antoine/py3k/__svn__/Lib/sunau.py", line 469, in open
    return Au_read(f)
  File "/home/antoine/py3k/__svn__/Lib/sunau.py", line 158, in __init__
    self.initfp(f)
  File "/home/antoine/py3k/__svn__/Lib/sunau.py", line 167, in initfp
    magic = int(_read_u32(file))
  File "/home/antoine/py3k/__svn__/Lib/sunau.py", line 138, in _read_u32
    if byte == '':
BytesWarning: Comparison between bytes and string