E330 Multi-Mode VCO
www.synthtech.com/eurorack/E330
What is the E330?
The E330 Multi-Mode VCO is a digital audio-rate oscillator with 3 different modes of operation, selected
by a front panel switch. There are 2 parameter controls/CV inputs that vary the behavior of the E330
based on the mode.
The E330 is not designed to be a LFO, the SynthTech E355 Dual Morphing LFO is better suited and
makes a great modulator for driving the E330.
Connecting to the power supply
The E330 uses a standard 16-pin Euro power cable. The -12V is the Red Stripe (Pin 1), and this is
indicated on the pc board. Reverse-supply diodes will prevent the module from damage if the cable is
reversed.
OVERVIEW
The E330 has 2 audio outputs
OUT1
and
OUT2,
which are controlled by
MODULATION A
and
MODULATION B
panel controls, respectively. Depending on the mode selected, these controls will
alter the outputs in different ways.
The 2 CV inputs
MOD A
and
MOD B
are
summed
with the setting of the panel controls, so there is no
attenuation built-in. The input voltage range is -5V to +5V, but in order to use this full-range the
corresponding panel pot must be in the 12:00 (straight up) position, or the CV will be internally limited
to the min or max endpoint(s). It is strongly suggested to use an external attenuator or VCA module to
first attenuate the incoming CVs to get the widest range of possible sounds from the E330.
COARSE
and
FINE
set the output frequency.
FM CV
input is attenuated by the
FM
panel control and
summed with the
COARSE/FINE
settings.
1V/OCT
is a tracking 1V/octave CV input (no attenuator).
SYNC
input will reset the VCO in all 3 modes, to minimum phase value if the sync signal exceeds 0.45V
(positive-level sensitive).
