A-110-1 Standard VCO
Voltage-controlled oscillator with approximately ten octave frequency range, producing four simultaneous waveforms: square, sawtooth, triangle, and sine. [6]
Specifications
- HP
- 10
- Depth
- 55 mm
- +12V
- 90 mA
- −12V
- 20 mA
- +5V
- —
- Last verified
- 2026-05-02
Capabilities
-
Exponential FM
exponential-fmFM via CV inputs is exponential, not linear. Changes in control voltage produce proportional changes in pitch relationship. [6] -
Hard Sync
hard-syncHard sync input resets slave VCO waveform to start of cycle whenever master VCO begins a new cycle. [6] -
Pulse Width Modulation
pulse-width-modulation -
Voltage-Controlled Oscillator
vco
Jacks (9)
Inputs (5)
| Name | Signal | Voltage | Description |
|---|---|---|---|
CV 1 |
cv | — | CV input for controlling VCO pitch. Follows 1V/octave. Normalled to internal system bus CV; inserting a patch cable disconnects the bus. [6] |
CV 2 |
cv | — | CV input 2 for controlling VCO pitch; level adjustable with the CV 2 attenuator knob. Voltages at CV 1 and CV 2 are summed. Follows 1V/octave. [6] |
PW CV 1 |
cv | — | Pulse width modulation CV input 1 for the square wave. Summed with PW CV 2. [6] |
PW CV 2 |
cv | — | Pulse width modulation CV input 2 for the square wave; level adjustable with the PW CV 2 attenuator knob. Summed with PW CV 1. [6] |
SYNC |
audio | — | Hard sync input. Connecting the audio output of a master VCO here locks (resets) the slave VCO waveform to the master's cycle. [6] |
Outputs (4)
| Name | Signal | Voltage | Description |
|---|---|---|---|
Sawtooth output |
audio | — | Sawtooth wave output with falling (negative) slope. [6] |
Sine output |
audio | — | Sine wave output. Derived from triangle via a simple diode-based converter; shape is not perfect (only a rounded triangle). [6] |
Square output |
audio | — | Square/rectangle wave output with variable pulse width. [6] |
Triangle output |
audio | — | Triangle wave output. Not perfect due to sawtooth-derived conversion; has a small notch at the top of the waveform. [6] |
Parameters (5)
| Name | Type | Range | Min FW | Behavior |
|---|---|---|---|---|
CV 2 |
knob | — | — | [6] |
PW |
knob | — | — | Manually sets the pulse width of the square wave output. [6] |
PW CV 2 |
knob | — | — | Attenuator controlling the level of the PW CV 2 input affecting pulse width modulation. [6] |
Range |
switch | -2 – 2 | — | 5-position rotary switch setting the footage (octave of the fundamental). Range positions are -2 to +2. [6] |
Tune |
knob | — | — | Fine tuning of VCO frequency in a range of roughly ±½ octave. [6] |
Firmware history (0 versions)
No firmware history recorded.