Analogue Solutions Concussor - Manual (Page 27)

ANALOGUE SOLUTIONS
CONCUSSOR e&oe (c) 12-2007 27
VCO-RM - Ring Modulation / VCO
Introduction
VCO-RM is a single VCO-RM laid out in a similar way to the VCO sec tion you would find on a monosynth. VCO-
RM in cludes a glide (slew) function, so this is a great bonus. VCO-RM can go down to low fre quen cies 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 in de pen dent 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