Yamaha SY77
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.

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.
- 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
- Websites of Interest
Route66Studios replacment SY99/77 and V50 floppy drives.
Yamaha Synthesisers Lots of history, info and links.
- Resources & Credits
Images from Perfect Circuit Audio and Synthesizer Picture Archive.
Errors or Corrections? Send them here.



Exellent digital synthetiser.
I like the FX wave sound (AWM).
For Novice to Ace good investigation...
But the sequencer & patchs are very complicated...
Good work for novice ( read manual )
Sorry for my bad english! Bye!...
Obviously you have not listened to all of the preset sounds nor even begun to pay attention to all of the other sounds out there for the SY77. It indeed can be a wonderful, full, thick analog mimic. One of the most endearing qualities of the SY77 I've been playing since 1990 it it's ability to mimic most any type of sound, 95% of my work over the last 19 years has been done on my SY77, the only exception being parts that I do on my Hammond C3, Steinway L, or SY99.
Clyde
The 16 waveforms consist of sine, square, varations on PWM and so on. The programming is easier than on the DX7. If you get to the envelopes which are devided in rates and levels, just put the levels for L1 on 99 and L2-4 on 0 for a start. Then you can use the rates as a normal ADSR. Great keyboard to play on.