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Yamaha TX81Z

 

 

 

yamaha tx81z

  audio demo trend price : 80-120€
manual factory patch demo video sample comments

Yamaha TX81Z
Multi Timbral FM tone generator (1987)
 

Rack module featuring a FM variation of traditional DX 6OP: budget spin-off from the famous Yamaha DX-7 synthesiser with some interesting technical improvement.

yamaha tx81z panel
tx81z technical data

info RACKMOUNT (weight: 3.4 kg) Main panel features a 2 x 16 lines display and 11 push buttons.

Back panel terminal connectors:
- main outputs
- aux outputs
- Midi interface
- tape interface for data storage.

Front panel terminal connectors:
- headphones out





edit VOICE
CPU is a HD63803XP Hitachi manages 8 digital voices DAC based on YM3012.
Previous DX synthesis is based on a 6 operators system with just pure sinewave and 32 combinations algorithms. The internal TX81Z IC chip YM2414B has only 4 OP and 8 combinations on the other hand if offers 8 waveforms: standard DX sinusoidal plus 7 computer-generated harmonics variations with partials and fundamentals fixed settings.



algorithms


edit SYNTHESIS there are 4 sinewave operators organized as algorithms, assigned as carrier or modulator, linked between them on different pathways interacting on their harmonic contents depending on the varable feedback strength.
- carrier: defines the amplitude and the spectral frequency
- modulator: sets the sound timbre and the relative harmonic contents.

Tx81Z offers 8 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.

 

data 4op


edit PERFORMANCE system manages 8 parts each with independent settings:
- mix level
- Midi channel
- effect amount
- pan position
- stack mode Eg: 4 voices or 8 monophonic
- portamento with glide time
- analog out assignment
The processor has some limits and cannot layer some particular algorithm combinations, and Midi response has some freezes with data flows (depends also on the OS EPROM official from 1.0 to 1.6)



lfo LFO there are 2 delayed modulators (frequency range from 0.007 Hz to 50 Hz)
- LFO amplitude
- LFO pitch

The modulators can be set to retrigger mode and features 4 shapes: saw, square, triangle and sample & hold.



adsr ENVELOPE
4 EGs: each OP features 1 amplitude EG (4-segments) + 1 general shift. Very simple Key tracking scale less sophisticated than previous DX line.



effect EFFECTS
not a real DSP but faked simulated by a Midi notes trick reducing polyphony.
There are 3 effect families:
- delay: with possible pitch shift and adjustable feedback
- pan moving: stereophonic path with follow velocity or LFO from left to right or vice versa
- chords mode: handles 4 notes



memroy MEMORY
holds:
- 128 ROM patches
- 32 RAM patches
- 24 RAM performances.
No external storage but full Sysex dump and edit by Midi or tape dump; note that MIDI Sysex strings are NOT compatible with 6OP DX line.


cem curtis 3372
battery replacement: soldered 3V Cr-2032

cem curtis 3372

 

scales MICROTUNE 13 different microtuning tables: 11 ROM preset + 2 users for non-standard intonation including Equal, pure, major-minor, Vallotti and Werckmeister.


tx81z demo


scales EDITOR there are many computer-based editors:
- Ctrlr (free)
- Midiquest ($$)
- noize ($$)
- TX81Z Programmer ($$)
- VSTizer TX81Z
($$)
Atari: YSEDITOR , Steinberg synthwork (PIC) , caged 4 OP artist
MAX MSP : yamaha tx81z editor

txz81z editor

 

scales RELATED FAMILY 4 OP:

yamaha dx9 Yamaha DX-9 (1983) first 4 OP model. Quite incompatible to other 4 Op DX line VIDEO
yamaha dx21 Yamaha DX-21 (1985) : real first started of the series with bitimbric layer with chorus and pitch EG VIDEO
dx100 Yamaha DX-100 (1985) : same as dx21 with minikeyss (cutteee!) VIDEO
dx27 Yamaha DX-27 (1985) : simplier dx21 version with 1 part, also a S version with internal speakers VIDEO
fb01 Yamaha Fb-01 (1986) simple module VIDEO
yamaha dx11 Yamaha DX-11 (1986) : more or less the Tx81z version with 8 harmonic waves VIDEO
yamaha ys200 Yamaha YS-200 (1988) : consumer 4 Op version with sequencer. VIDEO Also:
- Ys100 without sequencer and
- Tq5 is a laptop version
-B200 with internal speakers
yamaha-v50 Yamaha V-50 (1989): Boosted Ys200, top notch of 4 op series, with sequencer, drum machine, sequencer.. VIDEO


 

effet VST PLUGIN / SAMPLED VERSION there is no official VST emulation, however here's some FM emulator (6 or 4 OP)

  name price link demo
sample download polynominal free sample pack! 65 mb free samples:

- FM FARFISA
- DX TINES
- MELLOW SQUARE -LATELY BASS
HERE n/a
dexed VST plugin DEXED free VST
effet dexed FM emulation
hexter HEXTER Free VST effet hexter dx7
odsay MDA DX10 free VST effet mda dx10
oxe fm OXE FM SYNTH free VST effet oxe fm synth
vx7 vst plugin VX7 free VST effet n/a
fm8 Native instruments FM8 commercial VST effet fm8
FM HEAVEN FM HEAVEN commercial VST
It imports both DX7 and Tx81z patches
effet fm8


demoAUDIO DEMO

tx81z demo

demo You spin me round, 100% tx81z sounds mix
demo lately bass tweaking parameters



effet Soundcloud TX81Z

demo1 demo2 demo2

 

video VIDEO CLIP SELECTION

TX81Z Trackdriver Presets Yamaha TX81z Yamaha TX81Z Performance Mode
Trackdriver Presets demo1 Performance Mode

 




manual
YAMAHA TX81Z USER MANUAL

 




manual
SERVICE MANUAL

 




manual
OS EPROM DUMP

 

manual
FACTORY SET



original scan

 

 

original scan

 

Yamaha TX81z for sale

Yamaha TX81z for sale
CHECK OUT EBAY OFFERS

 

 

 

left side rack side logo printed


manual

- cheap
- sinewave variations

manual

- edit
- midi buffer
- polyphony


comment
SMART BUY!



REVIEW " aggressive digital sound at low price! needs a lot of time for programming and the awful interface can discourage good will---
Power for few bucks!."

tx81z



 

 

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yamaha tx81z 4 out of 5 based on 33 ratings. price €80