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Doepfer Gmx-1

General Midi Sound module expander (1992)

Doepfer GMX1

" A 20 voices general midi expander, a kind of sound cavas version made in Germany
A curiosity from famous modular producer Doepfer.  " 

 Main Data 

Doepfer Logo

Company: Doepfer
Model: GMX1
Class: module  
Keyboard: none
Dates: 1992
Country: Germany
Weight: 
Dimensions: / mm
Price: 50€

Display: none
Technology: digital rompler on custom single "PCM DREAM CHIP" 16 bits
Polyphony: 20 voices
Multitimbric: 16 parts 
Filter: digital
Effect: GS GM reverb and chorus
Memory: 128 GM patches + MT32 set (CMOS RAM km62256blp10)
Midi: in out 
PSU: external  
OS: EPROM tms27pc512

IC: SGS EF68B50P, dream SAM8905, DAC TDA 1545,

rear panel connectors:
- Midi IN OUT THRU
- 2 RCA out
- RS232 serial

Frontal panel connector:
- phones output



none yet

- No official VST plugin


 - no manual yes

- No service manual yet

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GMX1 In details 

General Midi

VOICE A 20 voices polyphony module with no edit control. The wavetable is based on General Midi protocol including piano, bass, guitar and drums, the classic arry for Midi files play
The non-expandable PCM rom contains probably 16 bits samples made by French society DREAMS, sounds is played with a TDA 1545 DAC.

Polyphony

20 notes

Timbral

modules handles 15 melodic parts + 1 drum

Sounds

About 128 multi samples sounds+ 6 drum kits. Sounds cannot be edited not saved.

Effects

Digital reverb and chorus.

GMX1

Our Verdict 

"A GM midi Canvas... like many others, only positive point is uncommon Doepfer brand." 

Sound 
quality

Interface

Build
 quality

Rarity

Quality / 
price

Overall

CONS

- sound
- no edit
- no memory

PROS

-Doepfer
- quite rare

Are you a GMX1  user? do you like it? You do not agree with our review?  Let us know in the comment field just below 

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Audio demo and video 

missing demo

Doepfer GMX1 Doepfer GMX1
41 out of 100 based on 1 user ratings
50 to 100 from 1 sellers Sellers: