The SY-2 is Yamaha's second analog synthesizer after the SY-1 from 1973. It is also a single VCO synthesizer with preset sounds and basic synthesis functions. It was designed as an accessory for organs. The SY-2 was partially built into the Electone CSY-2 organ and synthesizer, with only 14 presets.
The CSY-2 solo synthesizer is identical to the Electone CSY-1 and has the main functions of the SY-1 synthesizer. The analog sound generation is monophonic with a VCO for the sawtooth, square and sine waveforms. It offers only 14 preset, non-combinable but modifiable sounds instead of 28: Flute, Trombone, Trumpet, Saxophone, Oboe, Violin, Piano, Harpsichord, Bass, Tuba, Bassguitar, Funny, Trumute, Double. A low-pass filter with resonance and 12 dB attenuation per octave, a fixed filter, a high-pass filter and an adjustable VCA envelope are used to shape the sound. An attack/pitch bend effect, vibrato and portamento are also built in.
The organ section has the tones Wood 8', Horn 8' and Cello 8' on the lower, 6-voice manual and Flute 8' and 16', Trombone 16', Oboe 8', String 8' on the upper, 3-voice manual as well as Sustain, Bass 16' and Bass Custom on the two-voice pedal. It has Permissive, Vibrato, Reverb, Tremolo for the Pedal Sustain and an Auto Rhythm Section with March, Waltz, Swing, Slow Rock, Jazz Rock, Rhumba, Bossa Nova, Samba. There is an Auto Bass / Chord Fun Block with the functions Single Finger Chorus, Fingered Chorus, Constant, Memory, Normal.
