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doepfer
Reset
CV
CV
System A - 100
A-147
VCLFO
Frequ.
1. Introduction
Module A-147 (VCLFO) is a voltage controlled low
frequency oscillator, which can produce cyclical con-
trol voltages over a 0.01Hz to 50Hz frequency range.
The VCLFO can be patched as a modulation source
for a wide range of modules (for instance, modulation
of VCO pulse-width or frequency, VCF cut-off fre-
quency, VCA amplitude modulation) and as a provider
of repetitive or clock voltages (for instance to drive the
A-161 clock sequencer).
Four waveforms are available: triangle, sine, square,
and falling sawtooth waves.
The VCLFO's frequency can be controlled by hand,
but also by voltage control.
You can sync the VCLFO to another waveform by
connecting the other waveform (eg another LFO) to
the VCLFO's reset input.
A-147
VCLFO
1

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Summary of Contents for DOEPFER A-147

  • Page 1 System A - 100 A-147 doepfer VCLFO 1. Introduction Module A-147 (VCLFO) is a voltage controlled low frequency oscillator, which can produce cyclical con- A-147 Reset trol voltages over a 0.01Hz to 50Hz frequency range. VCLFO The VCLFO can be patched as a modulation source Frequ.
  • Page 2: Controls And Indicators

    A-147 System A - 100 doepfer VCLFO 2. Overview Controls and indicators: 1 Frequ. : Manual frequency control A-147 VCLFO 2 CV : Attenuator for the voltage at input " Voltage Controlled LFO 3 LED : Frequency indicator for the triangle Frequ.
  • Page 3 System A - 100 A-147 doepfer VCLFO 3. Controls and indicators 4. In- / Outputs 1 Frequ. ! Reset This control sets the frequency of the VCLFO in a A gate pulse entering the reset input socket ! enab- range from 0.01 Hz (one cycle every 100 seconds) to les the VCLFO to be synchronised with another 50 Hz (50 cycles a second).
  • Page 4 A-147 System A - 100 doepfer VCLFO ~ +5 V This socket outputs a sine wave (amplitude range ˜ roughly ± 5 V), whose frequency / voltage state is indicated by LED 3 . ~ -5 V ~ +5 V ™...
  • Page 5 System A - 100 A-147 doepfer VCLFO 5. User examples Simulating string vibrato The patch in Fig. 2 shows a string vibrato simula- An LFO can be used for all sorts of different modulati- tion, copying the common guitar or violin playing...
  • Page 6 Integrating the VCLFO into a MIDI system That makes the LFO frequency in effect program- mable, and also naturally means that you can control it Unlike the A-145 and A-146 LFOs, the A-147’s fre- while playing in real time. quency can be voltage controlled.
  • Page 7 System A - 100 A-147 doepfer VCLFO 6. Patch-Sheet The following diagrams of the module can help A-147 A-147 A-147 VCLFO VCLFO VCLFO you recall your own Patches. They’re designed so Voltage Controlled LFO Voltage Controlled LFO Voltage Controlled LFO that a complete 19”...
  • Page 8 A-147 System A - 100 doepfer VCLFO...