100.mp3 100 Hz signal
compl.mp3 compliance test stream
compl.wav reference result (from 24 Bit sample)

Note: the difference between the reference and the decoder
      are mostly > +/-1. (For these teststreams)

For "normal" music it looks like, if the result is not
determined.(Just encode you favourite .wav and then try
some mp3 decoder and compare the result. The differences are incredible.)