DOEPFER A-147 User Manual

doepfer
System A - 100
VCLFO A-147
1
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.
Frequ.
A-147
VCLFO
Reset
CV
CV

DOEPFER A-147 Specifications

General

Brand	DOEPFER
Model	A-147
Category	Recording Equipment
Language	English

Summary

Introduction to the Doepfer A-147 VCLFO

Overview of the A-147 VCLFO Module

Controls and Indicators

Details the manual frequency control, attenuator, and LEDs for waveform indicators.

Inputs and Outputs

Lists and describes the reset input, CV input, and various waveform output sockets.

Detailed Controls and Indicators

Frequency Control (Frequ.)

Explains how the Frequ. control sets the LFO frequency range from 0.01Hz to 50Hz.

Voltage Control Input (CV)

Describes the CV input for frequency control and the role of the Attenuator.

LED Indicators

Details LEDs indicating frequency and voltage state, and their behavior at high frequencies.

Detailed In- and Outputs

Reset Input

Explains the reset input for synchronizing the VCLFO with other oscillators.

Control Voltage Input (CV)

Details the CV input for LFO frequency, its addition to manual control, and attenuation.

Triangle Wave Output

Describes the triangle wave output and its indicator LED.

User Examples and Applications

LFO Applications (VCA, VCF, VCO)

Examples of using LFO for tremolo, tone color modulation (wah-wah), and vibrato.

Simulating String Vibrato

Patching VCLFO to VCO and VCA for string vibrato simulation with ADSR control.

Integrating VCLFO with MIDI

Using MIDI-CV interfaces to control VCLFO frequency for programmable and real-time adjustments.

Patch-Sheet for A-147 VCLFO