DOEPFER A-125 VOLTAGE CONTROLLED PHASE SHIFTER

DOEPFER A-125 VOLTAGE CONTROLLED PHASE SHIFTER

DOEPFER A-125 VOLTAGE CONTROLLED PHASE SHIFTER

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Module A-125 (VC Phaser) is a voltage controlled phase shifter.
Phase shifting can be controlled either manually or by voltage control.
Other parameters which can be controlled are resonance (governing the depth of the comb filtering, and tonal color) and mix (the amount of the original signal which is added to the phase-shifted signal). The A-125 is used to generate the typical phaser sound ("jet sound"). Due to the voltage control feature not only the usual LFO-controlled phasings but even ADSR-, random-, sequencer- or S&H-controlled phasings are possible. In combination with the Shepard generator A-191 and several A-125 never ending barberpole phasing effects come true.

For more detailed information please look at the English user's manual A125_man.pdf

Below you will find the frequency response of the A-125 for different phase shift settings.

A similar module is the modular 12 stage vactrol phaser A-101-3.


Klangbeispiele Sound examples
   
Im ersten Beispiel wird ein LFO zur Modulation der Phasenverschiebung verwendet. Am Anfang ist das unveränderte Originalsignal zu hören (Mix-Regler auf Linksanschlag). Dann wird der Mix-Regler in Mittelstellung gebracht, der CV-Regler aufgedreht und später auch der Resonanzregler. In the first examples an LFO is used to modulate the phase shift. At the beginning the original audio signal can be heard (Mix control = CCW). Then the mix, after that the CV and then the Resonance control is turned up.
A125_cluster_LFO.mp3
Im nächsten Beispiel ein ADSR zur Phasenmodulation verwendet. Die Modulationstiefe und Resonanz werden im Laufe des Beispiels manuell verändert: In the next example an ADSR is used for phase modulation. The modulation depth and the resonance are changed manually:
A125_cluster_ADSR.mp3

Breite/Width: 8TE / 8HP / 40.3 mm
Tiefe/Depth: 65 mm (gemessen ab der R√ľckseite der Frontplatte / measured from the rear side of the front panel)
Strombedarf/Current: 20 mA
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