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Roland GP-8

 

 

 

roland g8 effect rack

info Country: Japan
Weight: 4 Kg
Dimensions: 482 (w) x 282 (h) x 44 (d) mm
audio demo trend price : 100€
manual schematic demo   comments

Roland GP-8
Guitar Effects Processor (1987)

 

The GP-8 is a analog-digital hybrid multi-effect rackmount unit.

GP signal Processor a big Roland-Boss commercial success and many units sold around the world.

logo gp8
logo

info RACKMOUNT 1 rack standard unit.
Main panel features a numeric orange 16 X 2 lines LCD display, 16 buttons and an alpha-data dial for values entries.

Back panel terminal connectors:
- signal input
- stereo out
- line signal out
- Midi interface
- send/ return
- custom RCC input for pedal board FC-100 and optional EV-5 expression pedal.
info Tip: Midi and RCC as cannot be used at the same time.

 

 


edit TECH the main control is a 8-bits HD6303RF CPU (part of Motorola MC6803) and the internal circuit design is based on several hybrid digital / analog technologies.

cpu
The internal frequency sample response is
from 40 to 12 kHz.

 



edit INTERFACE EDIT
total lack of real-time knobs and many sub-menus.

gp8 tech The interface is not very intuitive but worst of all, all effect edits are limited to a bunch of main parameters and no deep edit is possible.




wavesEFFECTS
unit offers 8 effects in fixed order, each of them can be partially edited or muted (bypass). GP8 EFFECT LIST: overdrive, distortion, compressor, dynamic filter, phaser, parametric EQ, digital delay and Chorus

gp8  

Analog Overdrive simulates saturation, it should be a Turbo Overdrive equivalent. Parameters: tone / distortion / turbo boost.

Analog Distortion more a DS-1 rather than a SD-1. Parameters: tone / distortion.

Analog Compressor long sustain by cutting higher input and boosting lower input compression range from to -35dB. Parameters: attack / sustain.

Analog Dynamic filter changes the filter cutoff frequency and produces a WAH effect similar to the T-Wah stompbox. . Parameters: sensibility/ cutoff / resonance / cutoff

Analog Phaser a bit like out-of-control but feeling is interesting mainly due to famous operational IR3109 Parameters: rate / depth / resonance.

Analog Equalizer basic 3 -bands EQ, precious fina final chain effects. Parameters: HI / LOW / MID / LEVEL EQ.

Digital delay up to 1000 ms time, 12 bits sampling resolution but system lacks a stereo panning effects. Parameters: wet/ delay time/ feedback.

Digital Chorus very good and somehow unique ihmo Parameters: rate/ depth/ wet / pre-delay / feedback.

 

 

memroy MIDI only 2 Midi CC# control changes are available: numbers CC80 & CC16 for expression purposes, same functions as Ev-5 pedal.

clock memroy TECH: GP8 System handles Midi exclusives.




memroy MEMORY:
- 128 RAM slots performances
- NO ROM factory recall (download recover file)

demo


LEFT - Battery replacement a kind of CR1 3V (if my memory is right) soldered to the mainboard.

- Click for bigger motherboard pic -





edit EDIT just basic parameter can be altered, no in-depth edit is really possible.
There are 2 editors available:
- Midquest (commercial MAC/PC)
- GP8 editor (free Atari ST) LINK

 

gp8 editor atari st


 

demoAUDIO DEMO

demo guitar: liquid sky
demo guitar: smooth
demo guitar: liquid 2
demo guitar: some distortions
demo guitar: chorused
demo guitar: delay parameters
demo guitar: long delay
demo guitar: chorused quick
demo guitar: wah distortion
demo bass: fuzzed
demo synth: getting fat
demo synth: filter pattern
demo synth: minimoog filtered
demo synth: resonance sweep
demo synth: commodore sid sweep
demo synth: bassliner distortion
demo synth: funked wah
demo test: sinewave
demo Drum: processed loop
demo Drum: another processed loop


video VIDEO SELECTION

guitar demo guitar and roland gp8 Roland gp8 sounds
guitar demo again guitar various sounds

Company: Roland
Model: GP-8
Class: Rackmount effect
Dates: 1987
Display: 16 X 2 lines LCD
Technology: hybrid
Freq. response: 40 -12 kHz
Number of FX: 8
Delay time: 1 second
Delay resolution: 12 bits
Equalizer: 3 bands
Memory: 128 slots
CPU: MC6803
Demo: 2
0


thumb


manual
MANUAL



manual
SERVICE MANUAL



manual
DOWNLOAD FACTORY PATCHES


rx5 reset procedure

FACTORY RESET

No internal ROM recall, you have to reload the factory files by Midi- download this file in the "FACTORY PATCHES" below.



manual
-OS EPROM DUMP
-MORE DEMO

 

roland gp8
demo original advert


roland gp8
demodemo cat gp8



ROLAND GP-8 for SALE

gp8 editor atari st
CHECK OUT EBAY OFFERS

 

 

gp8 assy boss mark motherboard
awardSPECIAL AWARDS:

solid

solid
CHEAP as HELL weird hybrid

comment

REVIEW" Vintage sounding enclosed in a single rack unit: how much would you pay for EACH classic Boss stompbox?"

manual manual
- chorus - no reverb
-cheap
- limited edit



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all snapshots, sounds, texts copyright Polynominal.com / Eric Pochesci - polynominal.com is not associated or affiliated with ROLAND in any manner.

Roland GP-8 Roland GP-8 Guitar Effects Processor
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