Dr rhythm ( special edition)
The DR-880 is a rhythm-programming device that includes drum, percussion, and bass sounds from Roland's SRX library. 
It features "EZ Compose" buttons for creating patterns without note-by-note programming. 
The device also includes a "Groove Modify" feature, which allows for the application of various groove and triplet effects. 
It has a guitar/bass input with a built-in chromatic tuner and COSM amp models.