polynominal logo
Synthesizers Drum machines Samplers Effects 8-16bits+ toys HOME
Hardware for sale       Report Error Sample SHOP

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 edit 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 interesting
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:

demo

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


editBattery 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:

gp8 editor atari st

- Midquest (commercial MAC/PC)


- GP8 editor (free Atari ST) LINK


 

edit GALLERY:

roland gp8 roland gp8
thumb

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

 

demoDEMO:

demo guitar: liquid sky
demo guitar: smooth
demo guitar: liquid 2
demo guitar: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: sid sweep
demo synth: bassline distortion
demo synth: funked wah
demo test: sinewave
demo Drum: processed loop
demo Drum: processed loop2

demohave some Gp8
demo?
upload!


manual



manual



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

manual
-OS EPROM DUMP
-MORE DEMO

 

edit Sample SHOP
edit Report Error
edit SUPPORT US


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



Add Comment or Review

 

 

polynominal logo
      For sale Comment Contact
Synthesizers Drum machines Samplers Effects 8-16bits+ toys HOME

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
65 out of 100 based on 1 user ratings
70 to 150 from 1 sellers Sellers:
...