AudioWriter not converting to the specified bitrate

[SjoerdHulleman]

When using the AudioWriter (in python, standard mode), it ignores the bitrate field. When you code e.g. AudioWriter(bitrate=96, filename=filename, sampleRate=sr, format='mp3'), it does convert to MP3, but it always ignores the bitrate field. As a consequence, it always reverts back to the default value of 192kbps. This is at least the case for MP3 and OGG.