Doepfer A-147-2 VCDLFO

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Combination of a voltage controlled LFO (successor of the A-147), a VCA and a voltage controlled delay unit. All three parts can be used individually but in combination you can (very easily due to normalizations) fade in the LFO after having received a gate, e.g. for a delayed tremolo or delayed vibrato.
The LFO has four wave forms (sine, triangle, square and sawtooth), it's frequency can be voltage controlled and the LFO has a reset input. Voltage level ranges: -4V to +4V for triangle, sine and square and 0-8V for sawtooth. Frequency range without CV influence: 0.0005Hz to ~200Hz

The VCA has a linear curve and can be used as a voltage controlled attenuator or as a voltage controlled polarizer.

The delay has to be considered an attack-only envelope with a linear characteristic which is fired when receiving a gate at the "delay reset" input. The delay time (or the attack time to be precise) can be controlled manually or with a voltage.

and now to the combined use: The LFO's triangle output is normalized to the VCA's signal input. the "delay" envelope output is normalized to the CV input if the VCA. If now the delay receives a gate the attack envelope is fired, the rising voltage slowly opens the VCA and thus the LFO's amplitude is rising. Voilá, we have a delayed LFO which we can use for tremolos when connected to another VCA or for vibrato when connected to VCO pitch or for whatever you like.
Platums 8HP
Dziļums 60 mm
Modular Power 20mA at +12V, 40 mA at -12V
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