This site is dedicated to everyone interested in Serge Modular Music Synthesizers
Klangzeit - $3000 USD
Serge Klangziet

Features and Notes

Frequency Shifter (FRS)

The FREQUENCY SHIFTER is an advanced model with several improvements over existinq desiqns:
1 . Greatly improved signal-to-noise ratio
2. Extremely hiqh carrier frequency rejection
3. A very clean sound down to very low signal levels (unlike conventional shifters which have increasing distortion at low levels)
4, No squelch circuit and, therefore, no annoying dropouts or "pumping" action in the sound.

These improvements have so improved the quality of the sound, that even the most subtle natural sounds can be processed . Apart from its effect, the FREQUENCY SHIFTER does not intrude with extraneous noises or distortions. The FREQUENCY SHIFTER does not transpose . Rather it shifts each harmonic of the signal by a fixed value equal to the shifting frequency. Thus, as the shifting frequency becomes larger, the relationships between overtones are altered, and timbres change dramatically.

Uses of the FREQUENCY SHIFTER abound. It can be used to frequency modulate natural sounds (from musical instruments, for example), to produce the "Leslie effect" of rotating speakers, and to synthesize other phase shift and vibrato effects. In concert halls, frequency shifters are often Used to control feedback . It performs special effects on human speech, excellent for "computer-like" or "alien-type" speech . One of its most dramatic effects is frequency shifting of an echoed sound, where delayed signals get successively fed back and shifted up or down to produce incredible arpeggios of multiple echoes. Such an effect can be produced with the FREQUENCY SHIFTER and a reverb chamber or tape delay . Quite similar (and other rather far-out) effects can be produced with the use of the Analog Delay module.

This basic unit features a built-in oscillator (with 0 and 90 degree outputs) whose sine wave outputs provide for the smoothest and cleanest shifting... Additional features ... include output VCA's for both the UP and DOWN shifted signals, and an Output providing a COMPRESSED version of the input.

Control Module (C/M)

The CONTROL MODULE (C/M) is provided for economic utilization of extra panel space and as a low-cost source of manual triggers. Also included are two sections for attenuating control voltage or audio signal levels.

Wilson Analog Delay (WAD)

The Wilson Analog Delay was specifically designed to allow internal functions such as filtering, feedback, and delay to be determined by the user as a patch programmable function. Features of the Wilson Analog Delay include the following:

  • VOLTAGE VARIABLE DELAY OVER A VERY WIDE RANGE, from a minimum of .0005 sec. to greater than one half second
  • Availability of the TWO DELAYED OUTPUTS (A & B), one which is twice the delay of the other.
  • A FLANGING OUTPUT with a control to set its depth
  • A 1 VOLT PER OCTAVE (V/OCT) OUTPUT to permit controlling external VC filters easily.
  • THREE INPUTS, each with its own gain control and specific function. IN-1 is the main audio input for internal or external signals. IN-2 is suitable for audio, but also for the input of control voltages to be delayed. IN-3 is connected via a switch to provide feedback selectively from either the "A" or "B" delay outputs, or from the AUX jack. This channel features a processing-type control to scale and invert either the feedback from "A" or "B" or the AUX signal
  • .
  • An INNOVATIVE NOISE-CANCELLATION CIRCUIT which produces a very clean sound, as opposed to the "muffled" quality of more conventional analog delays.

Cross-Fader (XFAD)

The CROSS-FADER (XFAD) is an equal-power cross fade unit. The module has two signal inputs. As one signal increases in level at the output under manual or voltage control, the other signal decreases in level at the output. This effect is used to accurately fade one sound in while fading another out. Cross-fading with voltage control permits a smooth transformation between two different timbres. If a sound and its reverberated image (available with the Wilson Analog Delay) are sent through the cross-fader, the reverb mix can be voltage controlled. This effect can be used to modify the spatial characteristics of a sound event, from immediate presence to distant ambience. In addition to the cross-fade function, a VCA controls the output amplitude.

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
 ASR Quan  Audio Matrix Mixer
 Audio Interface  Control Generator
 Bi-Filter  CV Matrix Mixer
 Creature  CV Processor
 Dual NTO  Dual ADSR
 Dual 'Q' Filters  Dual Oscillator
 Gator  EQ Shift
 Klangshifter  Hex VCA Mixer
 Mayhem  Klangzeit
 Sequencer-A  Multi Filter
 Stereo Mixer  SQP Sequencer
 Triple Oscillator  Quad Slope
 Wilson Analog Delay  Wave Processor