I have been creating MIDI files for playback on my Nokia 3510 for a couple of weeks now but have recently had cause to wonder about the list of available voices documented in the Introduction to MIDI document. This document lists a total of 29 instruments and 14 percussion sounds that the 3510 is able to play.
I was recently sent a MIDI file that included a clarinet, however, and transferred it to my 3510 expecting that instrument to play silence. To my surprise it was audible and actually sounded like a clarinet.
I have experimented with a number of other instruments not included in the Introduction to MIDI document and some of these also appear to play correctly (though some do not), including harpsichord (voice 6), choir ahhs (voice 52), an alto saxophone (voice 65), and breath noise (instrument 121).
Is this just mapping these instruments to other instruments that the 3510 supports (which must mean my ears need cleaning) or are there actually a number of undocumented instruments? I'd be grateful for any experiences anyone else has had on this subject.