Roland Keyboard Voice ROM for D-10/20 Released in 1988 by Rittor Music. Features sound patches programmed by David Garfield. Number of Patches: The package states "128 Patches Include." According to a Reverb.com listing, 64 sounds are included in Bank A. Used to expand the sound source of Roland D-series synthesizers. Included: Dedicated case Instruction manual: Sound making instructions are provided for each song. It appears to have been used infrequently. #David Garfield #David Garfield #Keyboard Voice ROM #Roland #Rittor avc soft