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System A - 100

LFO 2 A-146

1. Introduction

Module A-146 (LFO 2) is a Low Frequency Oscilla-

tor

, which produces periodic control voltages over a

wide range of frequencies.

The LFO can be used as a modulation source for a

series of modules (for instance pulse width and/or

frequency modulation of a VCO, modulation of a VCF

cut-off frequency, amplitude modulation with a VCA).

Three outputs are available, with different waveforms:

sawtooth / triangle; square wave, and positive-

voltage square wave.

The waveform is continuously adjustable from rising

sawtooth, through triangle to falling sawtooth. The

same control affects the

pulse width

of the square

wave.

A three-way switch can select one of three frequency

ranges, spanning from one cycle every few minutes, at

the lowest, up to audio frequency at the highest.

Frequ.

LFO 2

Frequ.

Range

Wave

Form

1 2 3 4 5 6 7 8

Sommario

Pagina 1 - 1. Introduction

doepferSystem A - 100LFO 2 A-14611. IntroductionModule A-146 (LFO 2) is a Low Frequency Oscilla-tor, which produces periodic control voltages over

Pagina 2 - 2. Overview

A-146 LFO 2System A - 100doepfer22. OverviewControls and indicators:1 Frequ. : frequency control2 Frequ. Range : switch for selecting frequency r

Pagina 3 - 4. In / Outputs

doepferSystem A - 100LFO 2 A-14633. Controls and indicators1 Frequ.Use this control to set the LFO’s frequency, within therange set by 4.2 Frequ. R

Pagina 4 - 5. User examples

A-146 LFO 2System A - 100doepfer45. User examplesThe LFO can be used for all sorts of modulation:• LFO - VCAModulation of the amplifier produces pe

Pagina 5

doepferSystem A - 100LFO 2 A-1465• Variable pulse widthIn using the square wave for AM or FM in the audiorange, it’s possible to control the timbre

Pagina 6

A-146 LFO 2System A - 100doepfer6With the normal positive/negative square wave mo-dulating the pitch, the result is notes that are annoyin-gly out

Pagina 7

doepferSystem A - 100LFO 2 A-1467

Pagina 8 - 6. Patch-Sheet

A-146 LFO 2System A - 100doepfer86. Patch-SheetThe following diagrams of the module can helpyou recall your own Patches. They’re designed sothat a

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