SynthsYamaha ⇝ Yamaha TG77

Yamaha TG77Yamaha TG77 Front Panel - Left SideYamaha TG77 Front Panel - Right SideYamaha TG77 Back

The TG77 is a hybrid synthesizer that combines 6-operator FM and AWM2 synthesis for some very expansive sound creation capabilities. Yamaha refers to the FM synthesis as AFM, meaning Advanced Frequency Modulation. The "advanced" part comes from the availability of extra oscillator waveforms - 16 in all, with 45 different algorithms available. Each of the two engines is 16-note polyphonic, allowing for up to 32 notes of polyphony depending on how sounds are structured.

The TG77 is a rackmount version of the Yamaha SY77. It lacks a sequencer, but is otherwise nearly identical. The Yamaha TG55 is an AFM-only rackmount tone generator from around the same time and uses the same button style.

It has PCM waveform and data card slots, and expansion cards typically come in pairs. View the available expansion cards.

The display back light commonly burns out on these units. It can be replaced, and the screen is usable without it, but it is harder to read without a working backlight.

Yamaha LSI Chips used in the TG-77:

YM3029 (x3) - DAC. (Four channels per DAC).

YM7102 (x2)

YM7103 (x2)

YM7107 (x2)

YM7119 (x2)


Year Released: 1990

MSRP: $1995

Polyphony: 32 notes

Multitimbral: 16 parts

Preset Patches: 128

User Patches: 64

Preset Performances: 16

User Performances: 16

ROM: 4MB (112 waveforms)

Effects: 2 digital effects processors

Screen: 240 x 64 pixel backlit LCD

Outputs: 12 x 1/4 inch (2x stereo pair, 8x individual)

Power Consumption: 28 watts

Dimensions: 490 mm x 390 mm x 132 mm

Weight: 8 kg

This is a 3-space rack unit.

User Demo Videos


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Sound Samples

WAV samples are available on

File Downloads

Yamaha TG77 Manual (1 of 3)

Yamaha TG77 Manual (2 of 3)

Yamaha TG77 Manual (3 of 3)

Yamaha TG77 MIDI Data Format

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