Guitar SynthsRoland ⇝ Roland GR-77B

The GR-77B is a bass guitar synthesizer based on the Roland JX-8P synth engine. It is controlled using a MIDI bass with a 24-pin cable and can be edited using a PG-800 programmer. The guitar version is the GR-700.


Year Released: 1985

Preset Patches: 32

User Patches: 32

Screen: 4-character 7-segment LED display

Power Consumption: 27 watts

Weight: 12 kg

Dimensions: 690 mm x 375 mm x 155 mm

User Demo Videos


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File Downloads

Roland GR-77B Manual

Roland GR-77B Service Notes