The BOSS GM-800 is a next-gen guitar synthesizer pedal driven by Roland's Serial GK interface along with an advanced Zen-Core sound engine culled from Roland's flagship synths. The pedal's high-performance DSP elicits a natural playing feel and solid tracking, while its vast onboard sound library gives you plenty of room for inspired creativity. Employ the GM-800's intuitive Scene workflow to freely combine and modify Tones, add color to sounds with a wide range of effects, and discover a world of brand-new content on Roland Cloud. You also get two external control jacks, USB audio/MIDI and standard MIDI connectivity, and a Serial GK expansion jack for connecting to other BOSS guitar synthesizer units. The GM-800 injects your guitar or bass with limitless musical potential. It's small, sleek, adaptable, and primed for boundless creative excursions.
The GM-800 is powered by the Zen-Core sound engine — the advanced system behind Roland's lauded Jupiter-X and Fantom synthesizers. This guitar synthesizer pedal puts 1,200 onboard sounds at your fingertips, including acoustic and electric pianos, organs, and orchestral instruments along with classic Roland patches derived from the company's legendary Jupiter and JUNO synthesizers. The GM-800 gives you access to four Tone parts plus a Rhythm part teeming with acoustic and electronic percussion sounds. You can easily call up a part with dedicated top-panel buttons, then take a deep-dive expedition into its parameters. The Zen-Core engine's intuitive workflow is built around Scenes, which include tone selection, parameter tweaks, effects, and every other element of a sound. You get 150 user-configurable Scenes, 100 of which come ready to play with pro-crafted factory sounds. Need more sounds? No problem. The GM-800 supports Roland Cloud, supplying access to an ever-growing cache of Zen-Core Sound Packs and Wave Expansions (a 30-day Roland Cloud Ultimate trial is included).
The BOSS GM-800 also includes the Zen-Core engine's full range of multi-effects. Every Tone and Rhythm part has a dedicated multi-effects processor, from which you can deploy distortions, filters, modulation effects, delays, and a whole lot more. Moreover, each Scene includes two additional effects for processing the combined sound, along with ear-grabbing chorus/delay and reverb with independent send levels from each part. To top it off, you also get a Master Comp and EQ, enabling you to sculpt and mold the GM-800's master output.
Here at Music Experience, we're blown away by how playable the GM-800 is. Because the GM-800 dedicates a high-speed processor solely to tracking, you can expect rock-solid, lock-tight performance, both with electric guitar and electric bass. Tailoring the GM-800 to your playing style is a breeze as well, using easy-to-understand velocity and feel parameters. This permits you to configure a Scene with piano sounds to respond to the dynamic nuances of your playing. Plus, a Scene with old-school analog synth sounds can mimic the fixed velocity response of the original instruments.
Using the BOSS GM-800 as a standalone synthesizer pedal is intuitive and inspiring, by virtue of its four top-panel footswitches. You also get two external control jacks, with each supporting up to two footswitches or an expression pedal, plus 5-pin MIDI I/O for interfacing with external MIDI hardware. You can also craft Tone parts, adjust parameters, and organize your Scenes using BOSS Tone Studio software on your computer. The GM-800's USB audio/MIDI interface allows you to capture sounds as audio tracks in your DAW or to process recorded sounds in a similar way to re-amping guitar tones. You can use the GM-800's Guitar to MIDI function to play virtual instruments over USB and trigger hardware modules via MIDI. To top it off, you can use the GM-800 as a MIDI sound module by plugging a hardware controller into its 5-pin MIDI port. The GM-800 is compatible with BOSS GK-5 and GK-5B Divided Pickups or with classic 13-pin GK devices, such as the BOSS SY-1000, via GKC-AD and GKC-DA conversion boxes.
The GM-800 elevates guitar synthesis into a new age of natural playability and boundless creative range. Driven by the newly developed Serial GK interface, the advanced ZEN-Core engine unlocks any sound imaginable—from acoustic instruments to classic and modern synths—while high-performance DSP delivers tracking stability and expressive scope never before possible. Freely combine and edit Tones with the intuitive Scene workflow, color sounds with a huge selection of effects, and explore a universe of fresh content on Roland Cloud. Compact, streamlined, and ultra-versatile, the GM-800 infuses your guitar or bass with unlimited musical potential.
BOSS and its parent company Roland have been the worldwide leaders in guitar synthesizer innovation for nearly five decades, beginning with the revolutionary GR-500 system in 1977. The GM-800 continues our dedication to this category, providing guitar and bass players with powerful creative tools and access to sounds typically only available with keyboard-based instruments. Expanding and elevating the concepts behind many historic Roland GR products, the GM-800 merges our latest pitch and string tracking advancements with a versatile, cutting-edge sound engine.
The GM-800 is built around the expandable ZEN-Core Synthesis System, the sound source behind professional Roland products like the JUPITER-X and FANTOM keyboards, the ZENOLOGY software synthesizer, and many others. ZEN-Core is the most powerful synth engine in Roland’s long history, distilling decades of expertise into one sonically vast and deeply expressive creative instrument.
The ZEN-Core engine combines modern PCM synthesis and advanced modeling to bring you an infinite playground for sonic discovery. Play acoustic pianos, EPs, organs, and orchestral instruments. Tap into classic Roland synths like the JUPITER-8, JUNO-106, and many others. And combine them all together to build sounds never heard before.
The GM-800 features four Tone parts plus a Rhythm part filled with acoustic and electronic percussion sounds. Call up a part with the dedicated panel buttons, then explore a deep array of synth parameters, pitch settings, alternate tunings, and string assignments to shape sounds to perfection.
The ZEN-Core workflow is based around Scenes, which are “super patches” containing every element in a sound: Tone selection, parameters tweaks, sensitivity and other play settings, effects, and more. And thanks to the muscular DSP, you can carry over the sound of the current Scene as you select a new one for seamless musical transitions. There are 150 user-configurable Scenes, and 100 come with pro sounds ready to play immediately.
The GM-800 supports an ever-growing range of creative options through Roland Cloud. Stay inspired with ZEN-Core Sound Packs and Wave Expansions. And play the ZENOLOGY synthesizer and legendary Roland instruments in your DAW from your guitar or bass. You can start using Roland Cloud right away with a free Roland Account and access additional content via three paid membership levels. All plans start with a free 30-day Ultimate trial to experience everything Roland Cloud has to offer.
The GM-800 packs the full effects range of the modern ZEN-Core system. With an immense variety of effect types available in each Scene, you can shape, enhance, and mangle sounds to your heart’s delight.
Along with their sound-shaping parameters, every Tone and Rhythm part has a dedicated MFX processor. Each offers over 90 effect types, including distortions, filters, mod effects, delays, and more. Many selections include two effect types for additional sound-shaping control.
Within every Scene, you also get two additional FX for processing the combined sound, plus high-quality chorus/delay and reverb effects with independent send levels from each part. And with the Master Comp and EQ, you can shape the GM-800’s sound output for any recording or performance setup.
The GM-800 lets you harness an endless variety of sonic textures using the expressive playing characteristics of your guitar and bass. Optimize the performance with continuous pitch control or chromatic operation. Layer Tones to create rich, combined voices. Or assign them to individual strings, such as a bass sound on the low strings and a piano or sax sound on the high strings. You can even assign Tones to specific fret ranges, a powerful new feature made possible with the GM-800’s advanced pitch detection.
The GM-800 delivers accuracy, stability, and real-time playability standards that far exceed previous systems, realized through skilled BOSS engineering and a high-speed processor dedicated solely to tracking. Multiple velocity and feel parameters let you dial in the optimal response for every sound and style. For example, you can set a Scene with piano sounds to respond to every dynamic nuance—from soft to loud—while setting another Scene with vintage analog synth sounds to the fixed velocity response found in the original instruments.
The streamlined GM-800 flows smoothly from desktop operation to installation on an advanced pedalboard. The four footswitches default to Scene selection and two unique control settings, such as pedal hold, pitch bend, or Tone selection. But you can freely assign them to control a variety of functions via a powerful Assign matrix. Two external control jacks are also available, each supporting up to two footswitches or an expression pedal. And with five-pin MIDI I/O, you can interface with MIDI equipment from vintage to modern.
Along with standalone operation, the GM-800 merges seamlessly into a variety of expanded creative environments.
Craft Scenes in detail from your computer using the BOSS Tone Studio software for the GM-800. Set up Tones, string assignments, sensitivity, and more from a large, friendly interface. Then use the Librarian function to organize your Scenes for different songs and performances.
With a single USB cable, you can capture GM-800 sounds as audio tracks in a DAW and “re-synth” sounds in a similar way to the re-amp technique used with standard guitar tones. A Guitar to MIDI function is also available, allowing you to play virtual instruments over USB and trigger hardware sound modules via the MIDI output.
The versatile GM-800 can do double duty as a compact, go-everywhere MIDI sound module. Connect a keyboard or other MIDI controller to the five-pin MIDI input to play sounds live. Or use the ZEN-Core engine as a premium USB sound source within your music production workflow.
The GM-800 features the newly developed Serial GK digital interface, which supports guitar/bass input from a BOSS GK-5 or GK-5B Divided Pickup and easy linking of multiple GM-800 units. GKC-AD and GKC-DA conversion boxes are also available for classic 13-pin GK devices, allowing you to drive the GM-800 with a Roland GK-3 or GK-3B pickup and use Serial GK devices with the BOSS SY-1000 and GP-10.
Pedal Type | Guitar Synthesizer |
---|---|
Presets |
100 Factory, 150 Scenes |
Effects |
93 x Multi-FX, 7 x Reverb, 9 x Chrous |
Inputs |
1 x 1/4" (GK in) |
Outputs |
1 x 1/4" (GK out), 2 x 1/4" (R/Mono, L/Phones) |
MIDI I/O | In, Out, USB |
USB |
1 x Type A (Memory), 1 x Type B (Computer) |
Expression Control |
1 x 1/4" (CTL 3, 4/EXP 1), 1 x 1/4" (CTL 5, 6/EXP2) |
Power Source | 9V DC power supply (included) |
Usage | 2000mA |
Height | 2.48" |
Width | 9.68" |
Depth | 5.28" |
Weight | 2.56 lbs. |
Manufacturer Part Number | GM800 |