This page shows an example of the automatic transcription of music from audio to MIDI. The input signal was synthesized from MIDI and the program had to figure out the original MIDI given only the audio signal. This allows a comparison between the original and transcribed scores.
Original signal given to the transcriber.
Resynthesis of the transcription result.
Below two "piano roll" representations are overlapped for comparison. Green corresponds to the original piece and black to the transcription results.