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Yamaha DX7

 

 

 

dx7 e! grey matter
  audio demo trend price : 250€ (400€ with E!)
manual schematics factory patch demo video comments

YAMAHA DX7 
E! grey matter Response (1983)


The DX7 was the first affordable synthesizer implementing FM synthesis designed by John Chowning. The FM revolution changed the sound forever.

 display

synth detail

info KEYBOARD (weight: 15 Kg, dimension: 101.8W x 10.2H x 32.9D cm)
61 keys with velocity and aftertouch. The main panel features a 16 X 2 lines display, 42 buttons, 2 sliders for volume and data entry.

Rear panel terminal connectors:
- mono out
- Midi interface
- headphones out
- breath controller input
- sustain footswitch input
- portamento footswitch input
- volume pedal input
- modulation pedal input




edit VOICES main core 8-bit CPU Hitachi HD-63A03X manages 16 digital voices polyphony based on FM synthesis - the DAC is 12 bits BA922. The IC YM2128 generates 6 syncable sinewave oscillators or operator each with individual volume settings and pitch detune.


Fm key  Scaling


edit SYNTHESIS
6 sinewave operators organized as algorithms, assigned as carrier or modulator, linked between them on different pathways interacting on their harmonic contents depending on the variable feedback strength.
- carrier defines the amplitude and the spectral frequency
- modulator sets the sound timbre and the relative harmonic contents.

DX7 offers 32 different combinations algorithms with frequency ratio or fixed frequency: the output is fed back to its input with 7 different levels feedback, as general rule, high values feedback results in richer harmonic contents.



fm dx




lfo LFO
2 digital modulators (shapes: sine, triangle, saw up/down, square and sample & hold) with adjustable start delay and sync retrigger:
1- PMD modulates pitch
2- AMD processes the amplitude




adsr ENVELOPE
the IC YM2819 generates 7 envelopes:
- 1 EG pitch: 4-segments structure + 4 time levels.
- 1 EG for each operators: 4-segments structure + 4 time levels
The Scaling Level is a very precise key follower with 4 linear / exponential curves




memory MEMORY
- 32 RAM patches
Internal RAM is doubled if a cartridge RAM1 is present.
The backup memory works with a CR-2032 lithium battery soldered to the board,
Be aware that there is no ROM factory recall, so it is necessary to use Midi exclusives data for this job.

 

repairGREY MATTER E! BOARD EXPANSION This special board can be fitted to upgrade to machine to new functions and features:

- multitimbral
- ten times RAM slots
- monophonic with 8 voices stack
- adjustable random detune (variable range set)
- a user-friendly TX programmability
- controller remap
much more on the Dx7 E grey matter manual.


dx7 grey matter picture installation boardyamaha dx7 upgradevarious e!eprom set
motherboard closeuppic eflat remove

GALLERY E! : board requires a Dx7 with latest OS (only upgradable by EPROM) and requires some advanced skills for soldering and cutting circuit tracks.


lfo EDIT
the DX is not famous for easy edit functions, some computer-based editors can help:
- Atari ST: Dx-android, Dx expert or caged ST
- PC: Soundiver, Midiquest, DX-manager, Synlib ...
- MSX: YRM 103 -102 cartridge Voicing program also YRM304
- IOS: Yamaha DX7 /TX7 / TX816 Editor
- Hardware: if you are lucky enough, you can try the mega-rare Jellinghaus DX Programmer

Jellinghaus DX Programmer

android dx atari st
Ios editor missing link


family OP6 DX FAMILY After one year Yamaha released the super deluxe version Dx1 that later became the cheaper DX5. There' s also an expander module TX-7 then the huge TX-816 a pretty impressive rack modular version.


TX802 - Tx816 - Tx7 - Sy99 - DX200

dx7 family tree



effet VST PLUGIN / SAMPLED VERSION there are some free and commercial samples set:

  name price link demo
dexed VST plugin DEXED free
effet dexed FM emulation
hexter HEXTER Free effet hexter dx7
odsay MDA DX10 free effet mda dx10
oxe fm OXE FM SYNTH free effet oxe fm synth
vx7 vst plugin VX7 free effet n/a
fm8 Native instruments FM8 commercial effet fm8



demoAUDIO DEMO
GREY MATTER E!

demo official demo from1983 p1
demo official demo from 1983 p2
demo official demo from 1983 p3


effet Soundcloud DX-7

demo1 demo2 demo2


video VIDEO CLIP SELECTION

Yamaha DX7 Frequency Modulation YAMAHA DX7 DEMO 1 Yamaha DX7 E.Piano
Frequency Modulation DEMO 1 E.Piano

dx7 fm synth





manual
YAMAHA DX7 MANUAL

 

 


manual
FACTORY PATCH

 

 




manual
DX7 Service manual

 




GEEK TEST

testthe second DX7 version offers some update and sounds a bit different, mainly for the different DAC with higher resolution. I made a little comparison test:
DX7 Vs DX7II

 

 

original scan

 

 

yamaha dx7 milestones

 

 

performance on dx7 fm synthesizer

 

 

dx7 classic flyer

 


dx7 classic flyer


 

GALLERY: custom models
custom models

 



original scan




original scan
PIC: dx7 tatoo

 

 

original scan
PIC: it... needs repairs!

 

 

fun dx7
VID: fun guy playing DX7!



fun dx7
VID: Cesar Camargo Mariano- an incredible DX7 player! rhythm by Roland R-909

 

 

Yamaha DX7 for sale

Yamaha DX7 for sale
CHECK OUT EBAY OFFERS

 

 

 


manual

- raw sound
- FM concept
-history

manual

- keys dynamic
- weight
- edit

comment


REVIEW "We are here in front of the history! Massive sound, raw-powerful, hard to tame!"



 

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all snapshots*, sounds, texts copyright Polynominal.com / Eric Pochesci
*John Chowning found on wikipedia
*tatoo picture unknown author.
*Dx7 broken unknow author

Yamaha dx7 4 out of 5 based on 16 ratings. price €400