I am going to try using midi_out() to make some sounds, and I was wondering, how does the data value affect the sound? (Meaning: what part tells instrument, what part tells tone, etc...)

Whenever I use it with plain numbers, it just crashes.

Please help.

Thanks in advance!

Well, I guess that helps a little... Could someone direct me to a specific site that explains it? I couldn't find much that was useful...

All midi_out does is directly send midi commands. So its as "standard" as your midi device is.

If you don't find that in the pages I told you, you could search for a program that lists midi data as numbers. Anvil Studio is a midi sequencer program for Win that I use a lot. It's free. I think it can show the midi data contents of a midi file. I guess every midi file starts with the bank select and program/sound/instrument/patch select message for each of the channels that are used. I believe every channel that doesn't have these messages in the beginning, will just play the #0 instrument, which is a piano.

On my old Mac I use Micrologic Fun, which is absolutely great. If you don't find the codes for instrument change, I might find it when I next time use my equipment, but I can't promise it will be soon.