VCO The VCO is the primary sound source of the synthesizer and generates the basic waveforms.
1. Tuning This control the overall pitch of the SH-09. The tunable range is +/- 65 cents. 2. MOD (Modulator) With the mod slider high, the VCO is modulated by the output signals of modulaor (LFO). 3. Range switch This switch changes the VCO range in one octave jumps from 2' to 32', for a total range of four octaves.

4. Waveform switch This switch selects the VCO output waveform. The sawtooth waveform is particularly suitable for brass and string sounds, and for sounds which only the synthesizer can produce. Square wave The pure square wave has a sound quality very much like a clarinet. The clarinet and xylophone are common sounds synthesized with this waveform. Pulse wave. When the top and bottom portions of the square wave are unequal, the result is what is called a pulse wave. Noise Noise is the hissing sound produced by the random combination of all frequences.

5. Pulse width and pulse width modulation Pulse width refers to the ratio of the widths of the top and bottom portions of the pulse wave. 10% pulse width produces a sound very rich in harmonics and is often used for synthesizing sounds as the oboe, bassoon and human voice. Using the LFO to modulate the pulse width produces chorus-like sounds. The output of the envelope generator can be used to modulate the pulse width to produce sounds very much like those of pizzicato strings. 6.PWM Mode mode switch With this switch at MANUAL, the pulse widths may be set manually by means of the PULSE WIDTH MOD slider. In LFO, the pulse width will be modulated by the LFO output, and in ENV, by the output of ENVELOPE GENERATOR.