yeah, thank you for the bump, ward- I forgot about this post.
look, there's a million ways to make music that's a chiptune, but if you're considering really getting the authentic sound, give famitracker a try. there's plenty of tutorials on the you tubes, or just strike out on your own!
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I AM ZI, CHIPTUNE ARTIST FOR THE NINTENDO ENTERTAINMENT SYSTEM, COMPOSER OF BOTH BLEEPS AND BOPS, VIRTUOSO OF INSTRUMENT FABRICATION, MERCENARY OF THE RETRO MUSICAL SOUNDSCAPE! THE SEGA DEVELOPMENT GUYS KNOW ME AS KNUCKLES SPRINGSTEIN, THE LONG ISLANG GEEK SQUAD KNOW ME AS ABE ECKSTEIN'S BOY, AND I AM KNOWN IN CANADA AS THAT KEENER WHO ALWAYS GETS THE NUMBER TWO BREAKFAST COMBO AT TIMMIES... and there are other secret names you do not know of yet.