Musicians who have a musical ear always have an advantage. They learn a song faster and can play music without a score. But there are solutions that allow you to have musical ears.
MIDIView transcribes MIDI files as a sheet music. It also improves the musical ear. Just download a MIDI file, open it and start learning without worrying about the instrument that you play. It shows the MIDI file in different separate sequences for each instrument, which allows you to understand easily musical structure. It is easy to handle and the GUI is really well designed.