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Stereo Mixer $1700.00 USD

Features and Notes

Quadrature Oscillator (QUO)

The QUADRATURE OSCILLATOR (QUO) provides signals and features which make it ideal for controlling the Quad Panner . It generates two sine waves which are always displaced 90 degrees in phase from one another . This phase difference provides exactly the correct relationship for swirling a sound through quadraphonic space in a circular pattern (using the Quad Panner) . Since the Oscillator has a basic range from longer than 20 seconds per cycle to 500 cycles per second, many effects can be produced . Swirling a sound at an audio rate produces interesting spatial and modulative effects. Additional features include linear VCA's for each of the outputs. so that spatial swirls can be made to decrease in size, effectively spiralling inward . A HOLD input "freezes" the outputs whenever pulsed high . Thus a swirl can be stopped at a given location, with the sound just "hanging there" until operation is resumed . Switches on the Panel allow disabling the oscillator, a feature which has been found to be useful for live performance . The use of this module is not limited to Quad Panning . The phase separation between the oscillator's outputs provides for many interesting cross-fading effects when they are used to control other Serge modules.

Dual Transient Generator (DTG)

The DUAL TRANSIENT GENERATOR (DTG) provides two independent outputs with voltage controllable rise and fall times. This module is identical to the Dual Universal Slope Generator except that it does not have all of the front panel features. This module is a useful, space-effective unit to be used for many of the same functions as the Dual Universal Slope Generator. Common uses of the Dual Transient Generator are for simple "AR"-type envelope generation, as a dual voltage-controlled low frequency oscillator, or as a voltage-controlled clock (especially suitable for clocking the Touch Keyboard Sequencer or any of the Sequencer Programmers). These functions can be patched with the Dual Universal Slope Generator, but since many of the features are left unused in these patches, the Dual Transient Generator provides the same function while using less front Panel space.

Dual VCA (2VCA)

The DUAL VCA (2VCA) employs two high-quality VCA's. This module is an excellent inter-patch VCA, featuring very low noise and exponential response. It was designed as a small VCA function for use at various places within a system for internal VCA functions (as opposed to the VCA's for output mixing). Like the new Universal Audio Processor and the Cross-Fader this VCA has an audio taper that is an exponential curve with a 12 db per volt sensitivity throughout the range except below about .5 volts. Below this threshold, the output of the VCA will decrease rapidly to completely attenuate the signal. This response is perfect for our envelope voltage range. and is responsible for exceptionally quiet operation. Control voltage rejection is very high, and the unit cannot be overdriven beyond a gain factor of two.

Dual Channel Stereo Mixer (2x2) (DCSM)

The DUAL CHANNEL STEREO MIXER (DCSM) is an alternative output VCA/MIXER/PANNER for two and three-panel systems. The other choice for small systems is the UNIVERSAL AUDIO PROCESSOR (UAP). The UAP can be used for a number of voltage controlled mixing functions, but the DUAL CHANNEL STEREO MIXER is used for the standard output level control (or enveloping) and for voltage controlled panning. The DCSM has two independent channels for stereo panning, whereas the UAP can pan only a single channel when used as a stereo panner. Each channel in the DCSM has two VC inputs, one for amplitude control and one for panning. The panning controls are opposite for the two channels, so that if a single control voltage is used, the output signals will pan in opposite directions. Auxiliary inputs are used to six other signals into the outputs of the module. Signals applied here will not be affected by knobs or control voltages applied to the module. These are mainly useful for linking other mixers (either manual or voltage controlled) to the output bus. The output is available at a pair of banana Jacks (for routing the signals to other modules within the synthesizer), and at mini-Jacks (for connecting to external amplifiers, tape decks, and other equipment).

Thanks to Ty Hodson for pulling M-Class module information together from various sources. Other references include "Introduction of the Serge Modular Music System" by Rich Gold, Darrel Johansen, and Marina LaPalma
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