VCO-RM - VCO with Ring Mod
Introduction
VCO-RM is a single VCO-RM laid out in a similar way to the VCO section you would find on a monosynth. VCO-RM includes a glide (slew) function, so this is a great bonus. VCO-RM can go down to low frequencies so they can be used as an LFO
It also has a complete and independent Ring Modulator. This can be used on its own, or you can patch the oscillator into the RM, and along with another audio source gives you great Ring Mod’d sounds.
Ring Modulation
VCO-RM features a high quality Ring Modulator very similar to those found in the Roland System 100m, EMS VCS3 and ARP2600.
What the RM does is take 2 audio inputs, which we will call X and Y, then produce an output that contains the original frequencies X and Y, as well as the sum and differences of X and Y (X+Y, X-Y).
In non-technical speak, the RM best produces metallic sounding bell and clang sounds. The output is rich in harmonics and can often sound quite abbrasive. So filtering is necessary and the sound is best used for effects. The RM is a vital processor producing it’s own unique sound vital in an system.
RM In Use
Basically experiment with any two audio sources. The type of input signal (waveform) and pitch will alter the output. By slowly changing the pitch of one input some dramatic sounds can be produced. Note, the RM is completely independent from the VCO.
Controls In Detail
Tune
The VCO has a wide ranging tune control. Turning Tune alters the basic pitch of the oscillator.
Glide
Turning up Glide adds portamento to the oscillator, so the pitch will bend (slide) up or down to each note (as opposed to a sudden change). The higher the setting, the longer the oscillator takes to reach its new note. Not many VCO modules give you the all important Glide control as standard!
Triangle Level
This sets the output volume of the triangle waveform output.
Sawtooth Level
This sets the output volume of the sawtooth waveform output.
Square Level
This sets the output volume of the square waveform output.
Sockets in Detail
CV in
This socket is the pitch CV control input and is used to control the pitch of the oscillator.
Sync In
This is an oscillator Sync reset input.
Triangle Out
This is the audio output for the Triangle waveform. Its level is affected by the Triangle level pot.
Sawtooth Out
This is the audio output for the sawtooth waveform. Its level is affected by the sawtooth level pot.
Square Out
This is the audio output for the square waveform. Its level is affected by the square level pot.
RM X input
The X audio input to the Ring Modulator
RM Y input
The Y audio input to the Ring Modulator
RM output
The RM output
General Specification
Inputs
CV
PW
RM X
RM Y
Outputs
TRIANGLE
SAW
SQUARE
RING MOD
Controls
Tune
Glide
Pulse Width
Saw Level
Square Level
Size
12HP
Power
+/-12V, GND using Doepfer power socket.
Note: This module is at a higher octave than our other VCOs. This module has a push-pull octave switch built into the TUNE knob. Pull to lower the octave (if required!).
Concussor
Modular Synthesizer from Analogue Solutions
Tel:+44 1384 35 36 94 Fax:+44 1384 35 36 94
e&oe (c) 4 2008
