01
From the Community
From the community
No conversations about the SY99 yet — own one or know it well? Ask the first question, share a fix, or post your unit.
02
Audio Demos
03
Compatible Sound ROMs
04
EPROM Archive
Yamaha SY99_v.1.57_EPROM-Images
Version 1.57.os·3ED6A1200
05
Parts & Components
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06
Modifications
07
Owner Registry
Production figures for the SY99 were never widely published, so there’s no official record of how many were built — or how many survive. This registry is a community census: every owner who logs their unit makes it the closest thing there is to a real count.
0units registered
0 serials recorded
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08
System Components
CONTENTS
01From the Community02Audio Demos03Compatible Sound ROMs04EPROM Archive05Parts & Components06Modifications07Owner Registry08System ComponentsManufacturer
Yamaha
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Specifications
- Dates
- 1991
- Filter
- HPF, LPF
- Effects
- 2 × 63 types
- Keyboard
- 76 key
- Polyphony
- 32-voice
- Oscillator
- 6-Operator FM,PCM(AWM2)
- Timbrality
- 16-part
- Manufacturer
- Yamaha
- Storagememory
- 128 preset patches, 128 user patches, 16 user multi-patches
- Synthesis type
- FM,subtractive
- External control
- MIDI(In, Out, Thru)
- Left-hand control
- Pitch wheel, 2 × modulation wheel
- Velocity expression
- Yes
- Aftertouchexpression
- Yes