The CS-30 is a large, knob-infested, black analog synthesizer with traditional features. It is a monophonic synth with extensive analog control and shaping. It has two oscillators with separate outputs, two voltage-controlled resonant filters, two voltage-controlled amplifiers and three envelopes. It also features a ring modulator, external audio triggering and a simple but useful 8-step sequencer for use as a sketch pad, pattern or arpeggio effect. The CS-30 does not have any on-board effects, memory nor MIDI. Although the CS-30 is just a monophonic synth with a short 44 note keyboard it offers a lot of programming flexibility and plenty of knobs. It's used by 808 State.
The Yamaha CS30 is an analog keyboard synthesizer that was released in 1977. It is the top of the range in Yamaha's original line-up of monophonic synthesizers, others in the range being the CS5, CS10 and CS15. It features two voltage-controlled oscillators (VCOs), two voltage-controlled filters (VCFs - both featuring low-pass, band-pass and high-pass options), two voltage-controlled amplifiers (VCAs) and three envelope generators. It also sports a ring modulator and a voltage-controlled low-frequency oscillator (LFO).
It is fairly unusual for a hard-wired synthesizer in that it features a variety of switches that allow the user to re-route the signal flow from the usual VCO-VCF-VCA convention. For example, VCO 1 can output a square wave through VCF 1 whilst also outputting a high-pass filtered sawtooth wave through VCO 2. Another example is that the envelope generators can be assigned to any of the VCO, VCF and VCA modules and can also be inverted. Because the LFO is voltage controlled, the oscillating speed can be governed by an envelope generator and different waveforms can be applied to the other modules all at the same time. The CS30 also features an external signal input for filtering other musical instruments and audio sources, which can also be used as a modulation source.
Because of its signal routing flexibility, the CS30 is generally considered to be an excellent source of bizarre electronic sounds.
Polyphony: (1) Monophonic
Oscillators: 2 VCOs
Arpeg/Seq: Sequencer (Only 8 notes, 1 pattern)
Keyboard: 44 Keys
Control: CV/Gate, External Trigger