| Country: japan
Dimensions: 480 x 282 x 45,2 mm
| trend price : 100€
Yamaha TX81Z (1987)
Multi Timbral FM tone generator
Rack module featuring a FM variation of traditional DX 6OP: budget spin-off from the famous Yamaha DX7 synthesiser with some interesting technical improvement.
The Tx81Z is still especially appreciated for the low price and a famous electro bass preset LATELY BASS
RACKMOUNT one standard unit height.
Main panel features a 2 x 16 lines display and 11 push buttons.
Back panel terminal connectors:
- aux outputs
tape interface for data storage.
Front panel terminal connectors:
TECH CPU HD63803XP Hitachi manages 8 voices - DAC is based on a IC YM3012.
Main IC chip YM2414B features 4 OP + 8 combinations unlike previous DX7 synthesis based on a 6 operators system with just pure sinewave and 32 combinations algorithms.
The tx81z ROM has 1 stored digital half sinewave on a lookup table that can be read in different way and speed (similar to PD synthesis concept) creating 7 extra harmonics sinewaves variations with partials overtones and fundamentals fixed settings. The module does not feature "more waveforms" (like subtractive synthesis) thus not more "powerful" than traditional DX7 as this trick just compensates the lacks of 2 more OP.
harmonix variations waveform PIC
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 OP signalpaths combinations with frequency ratio or fixed frequency: the output is fed back to its input with 7 feedback levels, as general rule, high values feedback results in richer harmonic contents.
PERFORMANCE the FM voices can be assigned to 8 parts each with independent settings:
- analog mix level
- effect amount
- panning 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, furthermore Midi response has some freezes with data flows (depends also on the OS EPROM official from 1.0 to 1.6).
MICROTUNING 13 different tables: 11 ROM preset + 2 users for non-standard intonation including Equal, pure, major-minor, Vallotti and Werckmeister.
LFO there are 2 delayed modulators (frequency range from 0.007 Hz to 50 Hz):
- LFO1 to amplitude
LFO2 to pitch.
The modulators can be set to retrigger mode.
shapes: saw, square, triangle and sample & hold.
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.
EFFECTS not a real DSP but faked simulated by a Midi notes trick reducing polyphony.
There are 3 kind of effects:
- 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 up to 4 notes.
FX delay HEAR
- 128 ROM patches (preset list)
32 RAM patches
24 RAM performances.
STORAGE: 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.
BATTERY REPLACEMENT is quite easy but involves soldering a new lithium 3V CR-2032 on the mainboard (check picture below).
EDITOR there are many computer-based editors:
- Ctrlr (PC free) PIC
Midiquest (PC $$) PIC
noize (PC$$) PIC
TX81Z Programmer ($$) PIC
- YSEDITOR (ATARI ST) PIC
- Steinberg synthwork (ATARI ST) PIC
- Atari: caged 4 OP artist (ATARI ST) PIC
- MAX MSP yamaha tx81z editor PIC
VSTizer TX81Z (PC $$) PIC BELOW
RELATED FAMILY 4 OP:
VST PLUGIN / SAMPLED VERSION no official VST emulation, but some FM emulator (6 or 4 OP)
Mimì the synthcat with Tx81z and DX100
-->THANKS TO ALL THOSE GUYS WHO RIPPED MY PICTURE (ABOVE) DURING YEARS. F%%! YOU
all snapshots, sounds, texts copyright Polynominal.com / Eric Pochesci
polynominal.com is not associated or affiliated with YAMAHAin any manner.
yamaha tx81z based on 38 ratings.