Frequency Central Monograf Build Documentation

Frequency central
Monograf synthesiser
Monograf is a fixed signal path monophonic synth voice with many unique features, including a
number of patch points for flexibilty within a modular setting. Our aim was to design the simplest
full featured and good sounding single VCO synth within as small a space as possible, while offering a
broad sonic palette and fast setup times. Monograf includes the following elements:
•
Onboard LFO for PWM,
and onboard sub osc for
thick and juicy synth
lines
•
Super stable AS3340
based VCO featuring
sawtooth, triangle and
square waveforms, as
well as rotary switch
control of octaves and
an onboard LFO for
PWM. Features highly
accurate 1V/octave
tracking, as well as
extenal CV control of
linear FM.
•
Sub oscillator featuring
-1 octave and -2 octave
square waveforms. Add
a big bottom to your
sound.
•
5 toggle switches for
fast waveform
selection, allows for
super quick changes.
Additionally, the
triangle waveform is
routed directly to the
VCA, bypassing the VCF, to maintain a rumbling low end with higher resonance settings, this
is a little known modular trick which was practised by the ancients (!?).
•
12dB/octave OTA lowpass VCF based upon ARP Odyssey Mk1 'whiteface'. A very
characterful VCF with cutting resonance whose audio inputs can be driven into clipping via a
dedicated Drive control. The chosen level of drive can have a profound effect over the
character of the filter, and heavy drive will saturate the input while simultaneously reducing
resonance. Cutoff frequency can be controlled manually, from the LFO, from the ADSR,
normalised from a 1V/oct source, or from an external CV.
•
Vintage ARP style VCA with gated/ADSR/drone options via two toggle switches.
•
AS3310 based ADSR for super snappy envelopes. CV control of envelope output is available
for velocity controlled dynamics etc.
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