mml is complicated. especially if you don't know anything about music. I assume you do. so, what you want to start with are these 3 lines: bgmsetd 128,@data bgmplay 128 end this is the beginning of your test program. next, make a label further in the prg that looks like: @data ... data 0 make sure you have a data 0 at the end. unlike other times when you use data, you don't need to define vars