SUPERNOVA 12 VIDEO SYNTHESIZER
Supernova 12 video synthesizer is an analogue colour video pattern generation
system based upon the interaction of up to 12 oscillators producing combination
complex waveforms driving the red, green and blue components of a video signal.
The unit is capable of producing two independent
output color video signals that can be mixed together using the inbuilt
vision mixer. The result is a dynamic cascade of interacting waveforms producing
fascinating colour combinations in real-time.
synthesizer has separate modules that can be patched together as required for
pattern generation. Each oscillator module contains a range control, frequency
adjust, CV adjust, wave shape control and separate outputs for triangle, sine
and square waveforms. Each oscillator has a Controlled Voltage input, and a sync
lock input enabling the oscillator to be locked to the horizontal or vertical
sync pulses from the vision mixer. The unit incorporates several analogue
effects modules that can accept any output from the oscillators and includes
such functions as: addition, subtraction, differentiation, integration, rect.
and multiplication. A pulse width modulation control affects some of these
video synthesizer is controlled by a JVC KM-1200 Colour Special Effects
Generator. This unit provides the horizontal and vertical blanking signals for
sync-locking the oscillators, the video switching for the video inputs, and
provides a means where an external signal can act as a key for the two input
video signals. Complex multi-layered images can be built up this way, and
manually controlled by the vision mixer.
build a colour video image, processed signals from the oscillators are connected
to the red, green and blue picture inputs. The RGB levels are adjusted by the
operator as well as a bias adjust for each colour. The controls have a wide
range of latitude, and can make for maximum colour control flexibility from the
most subtle shades to the boldest hues and intensities enabling enormous
creative potential for the user.
Supernova 12 is capable of producing infinitely variable abstract dynamic
complex colour images with real-time control and adjustment. Interesting
patterns are formed when two or more oscillators are combined for each of the
RGB colour channels. One example is having an oscillator locked to the
horizontal or vertical sync and either modulating the output waveform via the CV
input or adding it to another sync-locked oscillator that is also modulated by a
CV input. The output waveform becomes the basis for one of the colour channels.
Repeat this process for the other two colour channels and very complex images
can be produced. Square waves typically produce hard-edge patterns, while
triangle and sine waves produce more curvilinear and softer edges to the images.
sequences of rhythmic modulation effects can be achieved by the unit. For
example, if a square wave output in vertically sync-locked, and this in turn is
modulated by a vertically sync-locked sine wave output added to another
oscillator free-running, then the result is a well-ordered but extremely
modulated pattern repeated on the video monitor. By changing the frequency of
the first oscillator, the angle or skew of the modulated pattern can be altered.
Vertically sync-locked oscillators produce a wide variety of angled waveforms for further modulation by their CV inputs. Mixing waveforms and inserting these into the CV inputs of a vertically sync-locked oscillator not only provides enormous scope for modulation expression, but the pattern is repeated horizontally beyond the edges of the display monitor. Using a square wave for the fundamental control oscillator produces hard-edge lines. Using triangle or sine waves produces maximum delineated patterns with a continuous soft edge. The result resembles soft cloud-like structures or vapour-like tendrils depending on how the control oscillator is modulated. An external function generator can also be used to modulate sync-locked oscillators producing an even greater range of frequencies for the user.