.MID ?

When you record music onto a computer using MIDI, the software saves this list of messages and instructions as a .MID file. If you play the .MID file back on an electronic keyboard, the keyboard's internal synthesizer software follows the instructions to play back the song. The keyboard will play a certain key with a certain velocity and hold it for a specified amount of time before moving on to the next note.
But .MID files aren't restricted to keyboards or other electronic musical instruments. They can be played on any electronic device that contains synthesizer software. Any computer with a sound card can play back .MID files. Cell phones use .MID files to play elaborate ringtones. MIDI data files are perfect for karaoke machines, because they allow the machine to easily change pitch for different vocal ranges. The .MID file will sound a little different on each device because the audio sources are different.