Yamaha SY-99 (1991)

Little formal documentation survives on the SY-99 in the usual spec-sheet sense. What does survive is a contemporary review of the instrument, plus scattered references in period manuals that treat it as a known quantity. The SY-99 was Yamaha's flagship synthesizer at the turn of the 1990s, a 43-pound workstation built around a hybrid of two Yamaha sound-generation technologies - AFM (Advanced Frequency Modulation) and AWM2 (Advanced Waveform Memory 2). One period reviewer said it ranged from bright and percussive to thickly textured and ambient. The sampled pianos, horns, drums, and strings struck the same writer as realistic.

The instrument was a complete stand-alone workstation. It had 16 independent voices, a 16-track sequencer with 99 patterns, a 76-note master keyboard with velocity sensitivity and zoned aftertouch, a built-in 3.5-inch disk drive, and a multi-effects section offering 64 effects built around two proprietary DSP chips. The front panel carried separate Data and Waveform cartridge ports, a data entry dial, a large LCD, separate short-throw sliders for each of the dual stereo output channels, and 70 switches for parameter and system editing. Three performance wheels sat to the left of the keyboard - one for pitch bend, two assignable to modulation routing. The rear panel offered foot switch jacks, a breath controller jack, two pairs of stereo outputs, a headphone jack, MIDI in/out/thru, and a dedicated click-track volume control for the sequencer. The reviewer called that last one genuinely handy.

The same review, published in 1991, was candid about the ergonomics. The SY-99 was not an intuitive instrument to navigate, and the writer credited the densely packed user manual with making it usable at all. Minor gripes included an undetachable, ungrounded power cord, a small "C3" label printed above middle C, and what the reviewer saw as a redundant pairing of linear and rotary data entry controls. None of these, in the reviewer's judgment, detracted from the instrument's sonic or operational strength. A separate trade-press note around the same period highlighted one feature that set the SY-99 apart from its peers: a digital output for direct connection to digital recorders, allowing an extremely quiet, punchy signal to be captured without an analog stage. The writer noted, with some amusement, that the Kurzweil K2000 had a digital input but no matching output.

Yamaha positioned the SY-99 as a composer's tool and as a flagship. Chick Corea was photographed with one, and Yamaha's own 1991 advertising tied the instrument to Corea's album Beneath the Mask on GRP Records. In the UK, Sound on Sound (September 1995, p.74) listed the SY-99 at £1599 in dealer advertising. That gives a price several years after launch, when it was already being sold alongside newer flagships. The same magazine's classified pages through 1995 and 1996 show the SY-99 regularly appearing in the used market.

The record leaves out several things: exact production years, original US list price, detailed filter or envelope specifications, patch memory counts, and a clean set of dimensions. The paper trail is thinner than the SY-99's reputation would suggest.