Yamaha SY77 6 Operator 80's AFM Digital Synthesiser Sequencer Workstation - 100V

  • Sale
  • Regular price $769.00

Yamaha SY77 6 Operator 80's AFM Digital Synthesiser Sequencer Workstation - 100V. 

**Floppy disk drive does not work. No screen backlight**

The SY77 is like having a super-sized sample-memory workstation with the added synthesis and sounds of the DX7MKII. For its synthesiser section it employs a 6 operator AFM synth engine similar to, if not better than, the original DX's. The AFM section offers 45 algorithms, 3 feedback loops and 16 waveforms for creating some of those unique FM sounds. Sampled sounds (AWM2) which are in memory (or on external ROM cards - not included) can then be mixed with the AFM sounds to create entirely wild new sounds! And these sounds are quite shapeable thanks to the resonant multi stage Time Variant Filters which offer the chance to recreate the warm analog sounds of classic synths, or create something entirely new.

There's an on-board sequencer section for creating your songs right on the SY77. It's got 16 tracks, channel 16 belongs to the SY77's built-in drum synthesizer which holds up to 61 sounds. The sequencer can hold up to 16,000 notes, 99 patterns and 1 song. And since the SY77 features 16 voices of polyphony for the AFM section, and another 16 voices for the sampled sounds, there are (32) plenty of voices to go around to build your song. Add the fact that there are 4 independent digital multi-effects which include reverb, delay, chorus, panning and more and you have yourself a classic music production workhorse. (vintage synth explorer)


  • This is a used unit. 

  • Physically this unit is in great condition. It shows a small amount wear from use and age like some small nicks and marks. Overall it is a nice piece. Please see photos for further details. 

  • Please note this unit has two small faults. this is that the floppy disk drive does not work and the screen is not backlit.  The floppy disk not working does not detract from the overall use or functions of the synthesiser. The floppy disk drive was for saving sequences to 3.5" disks. A synth savvy person could swap this out to a more modern USB or SD card emulator which would be much more functional and useful these days. The screen is still legible. 

  • All switches, sliders and controls function as they should.

  • This SY77 has recently come from a service. 

    • Deep clean inside and out.

    • Any minor functional issues were addressed.

    • Tact switches were replaced. 

    • The memory battery has been replaced and all factory patches are present. 

  • Please be aware this unit is 100V. This means it MUST be used with a step-down transformer, not a travel adaptor. If you are unsure about this please let us know. We have some great, compatible step-downs for sale here. They are designed in Australia for use in Australia and can be run 24/7.

  • If you purchase from outside Australia you may need a step-down transformer to use this unit. Please contact us if you need any help sourcing the correct product.

  • This sale is for the SY77. Absolutely nothing else is included in this sale.


Polyphony - 32 voices: 16 AFM voices, 16 AWM2 sampler voices

Oscillators - 6 operator AFM synth with 45 algorithms, 3 feedback loops and 16 waveforms; 16-bit AWM2 sample ROM waveforms

Filter - Multi-stage Time Variant Filters with resonance

Arpeg/Seq - 
16 track sequencer, 16,000 note capacity, 99 patterns, 1 song, 61 built-in drum sounds

Effects - 4 independent digital effects processors

Keyboard - 61 keys 

Memory - 128 preset & 64 user patches, 16 preset & 16 user multi-patches

Control - MIDI

Date Produced - SY77: 1989


If you are in a remote area you may incur extra fees. 

International import tax, duty, vat, custom fees or any other charges are not covered by us, nor included in the shipping fees. These are the responsibility of the buyer. 

Return Policy:

We do not accept returns for incorrect purchase or change of mind. 

Returns will only be accepted for manufacture defects / faulty items. Please contact us if you have any problems with your purchase and we will strive to work it out with yo