This article discusses MIDI (Musical Instrument Digital Interface) files, which provide a way to send audio to web clients.
MIDI files instruct a computer's sound card how to make a particular sound and send it to the speakers.
MIDI files are very small. A typical .wav file of a 5-minute song can be 20 megabytes or more. A comparable MIDI file of the same song can be less than 1000 kilobytes.
A2 Hosting's servers have the appropriate MIME types configured for full MIDI file support. You can use the .midi or .mid extension for your MIDI files.
For more information about MIDI, please visit http://www.midi.org.