to make your own songs with this quite frankly scuffed engine, you can use the preset variables. and then change the notes on n. if you would like the song to repeat, replace % 134 with the length of the n table. to change a octave, multiply a pre-set variable by a power of two or divide it by a power of two in the n table. to change the volume, it HAS to be as long as 6 indexes and you have to modify v. the BPM represents WHEN the next index will be loaded in Hz. DO NOT CHANGE THE T VARIABLE UNLESS YOU KNOW WHAT YOU'RE DOING