Hey folks. A little peek into the Z80 code in the M1 ROM of ADK's Neo-Geo games revealed a sound/music driver that was relatively easy to figure out & extract the note data. So, I've written up a page about my discoveries, and provided a couple conversion tools (& ASM project) that I hope help more people put their music into homebrew NG games, or rearrange ADK music on other sound hardware, etc. link: http://www.chrismcovell.com/ADKMML.html