Thanks again John. From what I've heard from internet samples the SD-2 sounds great. I was hoping to contol those sounds from my keyboard while hooked up to the computer using Band in a Box/ Real tracks. For simple playback without keyboard using Band in a Box I would simply hook up to my Echo Mia Midi's(soundcard) midi IN and Out to the SD2. Don't know if there is another reason for me to purchase and connect a USB interface as suggested. When I use my current S-90 as the BIAB sound engine the Midi connection works great for me. Just wanted a smaller module for ease of hook-up. I can see that using the USB to Midi would be necessary on a laptop or computer without Midi Ins and Outs. That is why I considered the SD4 so that I could have other connection options. Since the sounds are the same I'll probably purchase the SD2 and save some bucks.

Last edited by bluzkeez1; 04/20/11 09:35 AM.