Pittsburgh Modular Lifeforms Double Helix Module
Designed to be the nucleus of a synthesizer, the Double Helix
Oscillator is a modular waveform generator like no other. A set of
beefy, analog oscillators paired with voltage controlled shape
contouring, deep modulation, and a performance ready voltage controlled
modulation matrix create a dynamic, analog waveform playground.
the core of the Double Helix are two, wide range, precision
oscillators. The primary oscillator includes a full compliment of
waveforms and multiple modulation options. The Secondary oscillator
offers a more focused set of waves and frequency modulation. Both
oscillators reach deep into LFO range and can be used as voltage
controlled modulation sources.
The contour section of the Double Helix Oscillator features a highly
tuned wavefolder paired with our exclusive dynamic impulse low pass
gate. The contour signal chain starts with a two channel mixer. This
allows multiple waveforms or multiple oscillators to be combined before
passing though the contour section. The first half of the contour
section is a voltage controlled, 6 stage wavefolder used to add odd harmonics
to the incoming waveform. The timbre and timbre CV controls set the
density and amplitude of the folds. When processing a sine wave, the
wavefolder creates a spectral change from zero harmonics to square, with
an infinite harmonic series.
The second half of the contour
section is a dynamic impulse low pass gate. The effect of the low pass
gate is similar to pairing a low pass filter and VCA together. As the
dynamics control is opened, the filter adds harmonics and the VCA
increases the amplitude of the waveform. As the dynamics control is
closed, the filter removes harmonics and the VCA decreases the amplitude
of the waveform. This pairing mimics how sound behaves in the real
world creating a more naturally tonal response. The impulse input adds
the ability to strike or ping the low pass gate circuit creating a very
organic, percussive sound. The decay time of the impulse input is set by
the dynamics response control allowing the strike to be tuned to a
specific musical context.
The modulation section includes an LFO
offering simultaneous sine, square, and random waveforms. A noise source
is also available for audio or modulation use.
A pair of voltage controlled routers manage all the CV inputs creating a
dual, voltage controlled modulation matrix perfect for complex signal
paths, experimentation, and live performance. The matrix consists of two
voltage controlled amplifiers designed to control the modulation amount
inputs that can be routed to any of the Double Helix CV inputs. Each of
the CV inputs can be switched to channel a, bypass, or channel b and
mixed with a dedicated CV input.