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Oscillators
008R features two 100% analogue oscillators per voice (Voltage Controlled Oscillators - VCO)
identified by VCO-1 and VCO-2 labels, each one with its own Squarewave Sub-Oscillator.
008R’s VCOs are a traditional sawtooth integrator circuit using carefully selected components
for stability and accurate temperature compensation. Analogue wave shaping provides
triangle and variable pulse waveforms simultaneously. The VCO outputs have a high amplitude
and the drive option in cooperation with the vco level controls can be used to further shape
and distort the waveforms, morphing the character of the sourced from smooth and precise
to hard and overdriven.
1. Waveforms:
008R VCOs can produce 4 different classic analogue waveforms; Triangle,
Sawtooth, Pulse and Noise (available on VCO2 only – see below): just press the related
button to activate the waveform and you will see the LED lighting up. Our particular
design allows the oscillators to output multiple waveforms simultaneously: the different
waveforms are mixed internally and their overall volume is regulated by the Mix
parameter (see below).
2. Note:
These two encoders control the tuning of each oscillator in semitones, covering a
range from -24 to +24 semitones.
3. Fine:
This parameter controls the fine tuning of the oscillators, with the maximum value
of 127 corresponding to about a semitone.
4. Sync:
VCO2 has a hard synchronisation input driven by VCO1. When this option is On,
the two oscillators are hard-synced. VCO1 is the ‘slave’ oscillator: you can detune it or
modulate its pitch, but it will always follow VCO2 ‘master’ pitch.
5. Pulse Width (PW):
If the Pulse waveform is enabled, this parameter acts as a Pulse
Width control, with a maximum value of 255 corresponding to a squarewave.
6. Noise:
A noise generator is available on VCO2 only and, if enabled, the Sub2 encoder
works as a volume knob for it. The Mix encoder still works as an overall oscillator volume
after the noise volume. This means that if you want to hear the noise wave only, you
need to disable the Triangle, Saw and Pulse waves and turn up the Mix VCO2 level and
use Sub2 level to control the noise level.
7. VCO-2 Mod:
This option controls the amount of modulation the VCO2 signal will apply
on either or both the VCO1 frequency and the VCF Cutoff frequency. Please note that
you can tap the encoder to select the modulation destinations: you have 4 options (both
Off, VCO1 only, VCF only, both VCO1 and VCF) and the two LEDs on the front panel will
mirror the selected choice. VCO2 modulating VCO1 is generally referred to as ‘Frequency
Modulation (FM)’, while VCO2 modulating Filter Cutoff is commonly called ‘Filter FM’.
