The Roland J6 is a compact portable Chord generator, the classical Roland Juno sound makes it very useful in jamming or composing. It has 4-note Chord capability, and is fairly easy to program. There are 100 genres, and 108 different playing styles. J6 has 64 user pattern memory, and each memory can hold 64 measures of changes. This is the place for users to download custom patterns and experience different songs. (Usually 8 patterns will be compressed as a zipped patch, and transfer is easily done by a PC and USB cables)