@strayhorse I used audio and midi loops in the songs on In The End. I use an old Propellerheads (now Reason Studios) tool called ReCycle to slice & dice the audio files thus allowing me to alter the original. With midi files just get in there with a midi editor (most DAW’s have one) and play around with what’s there. You can also change the instrument being used to completely change what’s coming out. Plugins on either type can also totally alter the sound. Experiment, enjoy, have fun.