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System A - 100

Control Voltage Source A-176

1. Introduction

Module A-176 (Control Voltage Source) provides

three

voltage sources

, to use wherever an extra CV

is required.

The top two voltage sources (CV 1 and CV 2) have

controls for

coarse

and

fine

control of the voltage

output; the third source (CV 3) just has the one control.

The range of the voltages output can be preset, either

0 to +5 V

or to

-2.5 V to +2.5 V

depending on your

likely requirements. There is a jumper on the circuit

board for each of the three voltage sources.

A typical use for the module would be to provide fine

as well as coarse tuning for an A-110 standard VCO,

(which, unlike the A-111, only has one tune control),

See chapter 5, user examples.

In general, this module will be useful whenever you

need a manually controllable CV on a module which

doesn’t itself have a built-in control.

CV 3

Contr. Volt. Source

CV 1

Fine

CV 3

CV 1

CV 2

Fine

CV 2

Summary of content (6 pages)

PAGE 1
System A - 100 doepfer Control Voltage Source A-176 1. Introduction Contr. Volt. Source CV 1 CV 1 Fine CV 2 CV 2 Fine CV 3 CV 3 Module A-176 (Control Voltage Source) provides three voltage sources, to use wherever an extra CV is required. The top two voltage sources (CV 1 and CV 2) have controls for coarse and fine control of the voltage output; the third source (CV 3) just has the one control. The range of the voltages output can be preset, either to 0 to +5 V or to -2.5 V to +2.
PAGE 2
A-176 Control Voltage Source System A - 100 doepfer Controls: 2. Overview CVS Contr. Volt.
PAGE 3
System A - 100 doepfer 3. Controls 1 CV 1 • Control Voltage Source A-176 4. Outputs 3 CV 2 ! CV 1 • " CV 1 Controls 1 and 3 provide coarse adjustment of the voltages at outputs ! and ", and § and $ respectively. These are the internally connected parallel outputs for the first CV source, whose level is set by controls 1 and 2. The range of controls 1 and 3 is approximately 5 V.
PAGE 4
A-176 Control Voltage Source System A - 100 doepfer Improving tuning on the A-110 VCO 5. User examples Module A-176 is always going to be useful when you need a manually controlled voltage which is not available on a particular module itself. In contrast with the A-111 High End VCO, the A-110 standard VCO only has one control (Tune) for tuning. The range of this control has to be a compromise - it has a maximum range of only about an octave, but its fine tuning ability still isn’t very precise.
PAGE 5
System A - 100 doepfer SYNC A-110 VCO CV CV 1 Range CV 2 Tune Control Voltage Source A-176 Control voltage CVS can also come from a sequencer (for instance the A-160 / A-161 or MAQ 16/3), to change volume levels each time a pattern repeats. CV 2 A-176 Contr. Volt. Source CV 1 CV 1 Fine } CVS A-150 VCO CV Tune CV 1 I/O 1 A-176 CV 2 VCF I/O 2 O/I Fig. 2: Coarse and fine tuning an A-110 VCO.
PAGE 6
A-176 Control Voltage Source System A - 100 doepfer 6. Patch-Sheet The following diagrams of the module can help you recall your own Patches. They’re designed so that a complete 19” rack of modules will fit onto an A4 sheet of paper. Photocopy this page, and cut out the pictures of this and your other modules. You can then stick them onto another piece of paper, and create a diagram of your own system. CVS CVS CVS Contr. Volt. Source Contr. Volt. Source Contr. Volt.