Perfect for laptop recording.

It's a compact, portable, USB-powered MIDI solution that delivers the right number of sounds and works with your computer no matter what its age. Connects through USB or serial ports. Small size makes it easy to connect and create music anywhere. Includes a 32-part MIDI synthesizer with 64-voice polyphony. 660 preset sounds and 23 drum sets in GM2/GS, XGlite provide realistic sounds for all genres from classical to pop. Optical S/PDIF output. Includes reverb and chorus. 8"W x 1-7/16"H x 6-5/16"D. Includes USB cable.

Edirol SD-20 Studio Canvas MIDI Sound Module Features:

32-part, 64-voice polyphony
Complete studio module including 32-part MIDI synthesizer and 64-voice polyphony for sequencing, karaoke, huge orchestrations, and more
GM2/MS/XGlite for 660 tones and 23 drum sets
The standard GM2/GS/XGlite compatible sound selections provide realistic sounds for a variety of music genres
Optical digital output (S/PDIF) for exceptional MIDI sound quality output not found on other sound modules in its price range
USB bus powered, adapter-free
USB connection supplies power as well as data
Easy connection to computer (serial/USB)
Tone maps: 3 (classical, contemporary, solo)

Edirol SD-20 Studio Canvas MIDI Sound Module Specifications:

System requirements Macintosh:
Operating system: Mac OS 8.5, 8.6, 9.x and OS X
Computer: USB-ready Apple Macintosh
CPU/clock: PowerPC G3/233MHz or higher
Memory (RAM): 64MB or more
OMS 2.3.3 or later, FreeMIDI 1.35 or later
System requirements Windows:
Operating system: Microsoft Windows Me/98/98SE/2000/XP
Computer: Windows compatible equipped with a USB port (with compatible USB host controller)
CPU/clock: Pentium processors, 200MHz or higher
Memory (RAM): 32MB or more