The Edirol UA-20 is a USB MIDI interface with a 24-bit digital audio capture capability. It allows for recording and playback of high-quality audio and MIDI data. This interface is compatible with both Mac and Windows operating systems, making it a versatile option for musicians and producers. Its compact size and bus-powered design make it a great choice for portable recording setups, and its sturdy construction ensures reliable performance. The Edirol UA-20 also features a range of input and output options, including RCA and MIDI connections, making it a flexible tool for any recording or production project.