24-bit Digital Studio CanvasNow there's a compact, portable, USB bus powered MIDI solution, perfect for your laptop. The Edirol SD-20 gives you the right number of sounds, and works with your computer no matter what its age: you can connect through USB or serial ports. And its compact size makes it easy to connect and create anywhere.Perfect for laptop recording.The Edirol SD-20 Studio Canvas MIDI sound module is a compact, portable, USB-powered MIDI solution that delivers the right number of sounds and works with your computer -- even older models. The MIDI interface connects to USB or serial ports and its small size makes it easy to hook up and create music anywhere. The Edirol SD-20 includes a 32-part MIDI synthesizer with 64-voice polyphony, 660 preset sounds, and 23 drum sets in GM2/GS, XGlite which provide realistic sounds for all genres from classical to pop. Other features include optical S/PDIF output, reverb and chorus, and a USB cable.