Yamaha SY77

Yamaha SY77 Image

The SY77 is like having a super-sized sample-memory workstation with the added synthesis and sounds of a DX7mkII. For its synthesizer 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) 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.

Yamaha TG77 Image

The SY77 was also marketed in a rack-mount module called the TG77. All the same features as the SY77, except the keyboard, sequencer and 3.5" disk drive are gone. Following the SY77 came the upgraded SY99. Its main features and guts were the same however it had increased memory, waveforms and a bigger keyboard. The SY77 (or TG77) is great for really controlling and creating sounds for use in various electronic forms of music and has been used by 808 State, Skinny Puppy, Brian Eno, Europe, Toto, Vangelis, Chick Corea, and Front 242.

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Are you looking to buy or sell a Yamaha SY77? Post an ad in Gear For Sale or a request in Gear Wanted. For spare parts and repair services check out Gear Services & Other Goods. Our forums also has a Buyer’s Guide section where you can ask for advice on buying synthesizers.

100 Visitor comments
Arik S.
May 1, 2012 @ 8:28 pm
Resoldering is the fix that works most of the time. At the factory electronic components are inserted by machine into printed board and then the whole board gets run through heat oven (above the solder melting point). Obviously some joints get more heat than others, hence the "cold solder" problem. If you don't know what's happening, just apply flux all over and resolder every joint, no matter how they look. Sometimes a thin oxide film develops and what part don't make a contact anymore. Manual resoldering is a universal cure for this.
simon gurden
January 15, 2012 @ 6:59 pm
the diskdrives in my sy77 and v50 both appear to be broken. is it worth replacing them or is their a computer dump method that does the same thing?
December 30, 2011 @ 2:39 pm
Did anyone else try the floppy drive exchange to a regular pc drive? I have downloaded fm-alive's zip, and it says the power connector has to be connected seperately by using pins 1/3/5 from the original cable. However, PC drives seem to require 12V and 5V supply whereas the SY's interface seems to provide 5V only. Has anyone tried this out? Maybe it does run on 5V only?
Clancy Howard
December 18, 2011 @ 4:55 pm
The power transformer on my SY77 died, I don't suppose anyone has an idea for a replacement as it's probably a custom job. Anyone know if Yamaha still carries any?


December 5, 2011 @ 9:09 pm
You can find drives on eBay from a vendor based in Italy .they are beltless and take about twenty at the most painless minutes to replace. You can try the rubber band belt fix that sometimes works and some times does not. Work a try for a quick dirty fix tho. The beltless drives are fairly cheap and instal with no mods at all to the unit.

Ok so that aside can someone explain why this is rated 4 stars and the sy85 also gets four stars. I mean it does not make sense. Isn't a sy85 a sy77 without the fm section.
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User Rating

Rated 4.33 (1137 Votes)

  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • 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 with velocity and aftertouch
  • Memory - 128 preset & 64 user patches, 16 preset & 16 user multi-patches
  • Control - MIDI
  • Date Produced - SY77: 1989, TG77: 1990

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