Roland GR-1 Guitar Synthesizer 200 PCM tones, expandable to 400 with optional expansion board Digital reverb, delay, chorus and flanging Four-part multitimbral via MIDI / 2000 note internal sequencer GK-2A Divided Pickup mounts on virtually any steel-string guitar Note that this product is no longer in production. Similar capabilities can be found in the GR-33 Guitar Synthesizer.