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Yamaha Tg-55

Tone Generator (1990)

module rackmount unit k

"Yamaha SY-55 synthesizer rackmount expander version minus the internal sequencer .
Tg55 is a module based on internal samples with resonant filters and a true synth structure for edit."

 Main Data 

Yamaha TG44 made in Japan

Company: Yamaha
Model: TG-55
Class: Synth Module
Rack: 1 unit
Dates: 1990
Country: Japan
Weight: 4,2 Kg
Dimensions: 480 (w) x 44 (h) x 330 (d) mm
Price: 100€


Display: 16 X 2 lines LCD
Synthesis: PCM rompler
Resolution: 16 bits
S. Frequency: 32 - 48 kHz
N. Samples: 74 PCM
Polyphony: 16 voices
Multitimbral: 8 parts
Oscillator: 4 PCM
Filter: Digital Low pass
LFO: 1 modulator
Envelope: 3 EGs
Effect: 34 models
DAC: AD1856N
CPU: H8/523 


Main panel features a 16 X 2 lines display, 18 buttons and a data encoder.

Rear panel terminal connectors:
- Midi interface
- main signal out
- AUX analog out

Front panel terminal connectors:
- headphones
- PCM card slot (see expansion)
- data card slot. 

FACTORY RESET PROCEDURE
factory reset procedure
press the [EXIT] switch, which will execute test 31 – Factory Settings. 

CHECK OS
While pressing the [SELECT] switch, press and hold [EXIT] switch, then [Utility] .

- DOWNLOAD 400 FREE PATCHES


- No official VST plugin
- no known samples library

Have some SY55 sample set you want to share? CONTRIBUTE :) 

owner's manual download

Have some SY55 sample set you want to share? CONTRIBUTE :) 

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 In details 

Sy55



 VOICE main CPU based on 8H8/523 manages up to 16 voices polyphony based on 16-bits AW2 Advanced Wave Memory 2 synthesis (IC YM7119 also filter) - the TG DAC is analog device AD1856N

PATCH architecture is composed by 1, 2 or 4 PCM samples or ELEMENTS read out from internal ROM wavetable.

Each PCM ELEMENT can be individually edited with various parameters:
- volume mix
- pitch tuning
- effect amount
- keyboard zone
- special drum kit mode assigns 61 PCM in a single patch.

module expander technical data

WAVETABLE internal 2 MB ROM contains 74 PCM (PCM LIST) waveforms sampled at 32 / 48 kHz organized 3 categories: acoustic, digital and drums:
-  50 PCM acoustics samples e.g organs
- 8 PCM basic digital waves e.g sawtooth
- 16 PCM various acoustic drums and percussions .

A collection of set of DATA / DATA +PCM cards were available.  AI2 PCM cards are compatible between different Yamaha machines, so you can use SY-99 cards , TG77 RY30 on any 55 series. Note: This list is not complete. 

NAMECards SN PIC
Analog synthesizer M. Shinoda1VC5501WYES
Brass 2  S5504-
Digi synthesizer sound M.Shinoda1  VC5502WYES
Drums 12  S5502YES
Modern Artist Soudscape1  TG-502YES
Modern Artist Soundsource1--
Modern Rock classic Soundsource1-YES
Rock Pop2  S5501 -
Sax 12  S5501 YES
Synth goes live1 EMS55-R002YES
Synwave 12 S5531YES

LFO / EG / FILTER

Filter

FILTER 

Based on a custom IC YM7119 featuring 2 digital resonant filters in cascade, each with a -12dB slope:

- Filter 1 mode is both lowpass and highpass
- Filter 2 mode is only lowpass

TIP: Cutoff can be controller by LFO or dedicated EG, but not both at the same time. 

LFo

LFO

Single delayed digital modulator (shapes: saw up, saw down, triangle, sinewave, square, triangle and sample& hold) for each ELEMENT and 3 destinations:

 - AMOD: LFO to amplitude
-  PMOD: LFO to pitch
-  CUTOFFMOD : LFO to filter cutoff.

Envelope

Envelope

3 EG families per element:
- AEG amplitude : 4 segments + 5 levels and octave scaling setting.
- PEG pitch: 4 segments + 5 levels and octave scaling setting.
- CEG1 filter: 6 segments + 5 levels and octave scaling with special breakpoints
- CEG2 filter: 6 segments + 5 levels and octave scaling with special breakpoints. 

Module Performance

TG-55 Performance

Multitimbric

Module manages up to 16 parts each with assigned
reserved polyphony, pitch tuning,  panning position, volume
and effect amount.
TIP: the global pitch amount can be assigned to aftertouch or randomized for each note..

Midi

The Special CONTROLLER section (in utility mode) allows to assign some parameters like filter cutoff, volume, modulations to any control changes on the Midi list.
Full sysex implementation is supported. 

MEMORY:
- 64 ROM patches (PRESET LIST) + 64 RAM
- 16 ROM + 16 RAM performances
- 999 sequencer measures
- 8000 sequencer notes.
RAM is doubled using memory cards model MCD-32 or MCD-64.
Battery replacement: a cr2032 3V soldered to mainboard 

Yamaha TG55 battery replacement

EFFECT SP YM 3413 handles 34 fully editable effects, including reverb (x8), delay, stereo panning delay, gate and digital distortion. Full effect LIST 

MODDING and BENDING
we did circuit bent a poor TG55, some rich digital textures and glitched noises are at fingertips.
Some demo into the demo section below

Our Verdict 

 "Double resonant filters are very cool for digital cutting sweeping pads with complex EGs! of course no use for modern acoustic instruments. Very very cheap now, give it a try!"

Sound 
quality

Interface

Build
 quality

Rarity

Quality / 
price

Overall

CONS

- polyphony
- some dated internal waves

PROS

- sweeping filter
- cheap

Are you an SY-55 user? do you like it? You do not agree with our review?  Let us know in the comment field just below 

DISQUS COMMENTS WILL BE SHOWN ONLY WHEN YOUR SITE IS ONLINE

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Yamaha TG-55 Module Yamaha TG-55 Module
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