The DD1M includes 50 preset sounds as well as basic editing functions for the sound bank. The DD1M also has a USB out and a Aux In with an independent volume control for an MP3 source. The d1M drum module is a very capable and versatile control center for your triggers. with 50 editable onboard kits, you can go from a rock groove to a Caribbean beat or a custom groove with a simple push of a button. If you are considering the addition of a couple of electronic pieces for your acoustic kit or adding triggers to them, you really need a DD1M drum module.