The voltage controlled oscillator is one of the essential core modules in your modular analogue synth. The M²Synth has a few options for VCOs:
- VCO 101 with sync inputs and sub octave pulse outputs
- VCO 102 is a quad VCO with preset chord intervals between the VCOs
- VCO 103 is a mini version of the 101 without the sync and sub octave features
- Voice 108 has in addition to a VCO, other core functions including a filter, VCA, noise, ADSR etc.
Overview
This module, the Voice 108 contains all of the essential elements of an analogue synth in a single 'voice' module. It uses toggle switches for patching with additional jack sockets for integrating into your modular synth.
Voice 108 Functions: VCO, LP VCF, VCA, ADSR, LFO, Noise generator, Mixer & Gate Pulse Generator
Voice 108 Patching:
- ADSR gate - internal from repeat gate generator or external source
- VCO frequency modulation from LFO or ADSR
- VCO PWM modulation from LFO or ADSR
- VCF cut-off modulation from LFO or ADSR
- VCF cross modulation from LFO or ADSR
- VCA level from LFO or ADSR
Features
VCO Features:
- 1 Volt / Octave CV
- Coarse and fine VCO frequency controls
- PWM control
- CV control of VCO pulse width modulation (PWM)
- Sub-octave square wave output 1 octave below main frequency
- Jacks for VCO Sine, Triangle, Saw and Pulse waveform outputs
VCF Features:
- 1 Volt / Octave CV
- CV control of VCF cut-off, cross modulation and resonance
- Controls for cut-off, resonance and cross modulation
VCA Features:
- CV control of VCA level
- Initial level control
LFO Features:
- LFO waveforms square, saw, triangle & ramp
- Level and rate controls
Gate Pulse Generator:
- Gate rate control
Mixer Features:
- Six mixer level controls for VCO pulse, sub-octave, saw, triangle, sine + noise
- Common voice output jack
ADSR Features:
- Controls for Attack, Decay and Release envelope phases along with the Sustain level
- Time range selection switch x1 / x10
- Gate input for full ADSR output
- Illuminated manual gate button
- LED indicator of gate pulse
- ADSR output level control
Specification
- Supply voltage +/-15Vdc using two included inline voltage regulators (note: this module uses two power supply connectors for load sharing)
- Supply current J1: +68mA / -68mA, J2: +12/-26mA
- Panel width: 4U
- Waveform levels +/-5V
- Main PCB dimensions 175.26 x 188.51mm
- VCO frequency range without applied CV 20Hz to 13.6kHz
- LFO frequency range 0.037Hz to 17Hz
- Gate frequency range 0.038Hz to 9Hz
Kit contents
Each kit contains
- Main PCB
- Jack socket PCB
- All electronics components, IC sockets and power socket
- Pair of 100mm long Power leads
- Potentiometers, knobs, switches and jack sockets
- Front panel assembly (faceplate and 3mm PCB holder)
- Fixings
- Two fully assembled and boxed 15V in-line voltage regulator with MU and MOTM headers