def _load(self, filename):
self.log.debug("Loading file %r", filename)
f = wave.open(encode_filename(filename), "rb")
metadata = Metadata()
metadata['~#channels'] = f.getnchannels()
metadata['~#bits_per_sample'] = f.getsampwidth() * 8
metadata['~#sample_rate'] = f.getframerate()
metadata.length = 1000 * f.getnframes() / f.getframerate()
metadata['~format'] = 'Microsoft WAVE'
file = Wave(f)
self._info(metadata, file)
return metadata
