User guide

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doepfer

System A - 100

DIVIDER A-115

1. Introduction

Module A-115 (DIVIDER) is a four-way frequency

divider

The frequency of a signal at the input is halved (half

frequency = first sub-octave), quartered (1/4 frequency

= second sub-octave), and so on.

In this way, the DIVIDER produces four sub-octaves

(F/2 down to F/16).

At the output, the A-115 produces a summed mix of

the original and the four sub-octaves. There are at-

tenuators to control the amount (ie. Amplitude) of the

original signal and each of the sub-octaves.

Bear in mind that the sub-octaves output by the A-115

are all true square waves. If you put, eg., a sawtooth

into the Divider, it changes it into a square wave before

the frequency division takes place (using the Schmitt-

Trigger system, if you’re interested). At the output,

therefore, there are always four square waves and the

original signal available.

Audio In

F / 2

Audio

Out

F / 8

A-115

DIVIDER

F / 4

F / 16

Orig .

Summary of content (6 pages)

PAGE 1
System A - 100 doepfer DIVIDER A-115 1. Introduction Audio In A-115 Orig. F/ 2 DIV IDER F/ 4 F/ 8 Audio Out F / 16 Module A-115 (DIVIDER) is a four-way frequency divider. The frequency of a signal at the input is halved (half frequency = first sub-octave), quartered (1/4 frequency = second sub-octave), and so on. In this way, the DIVIDER produces four sub-octaves (F/2 down to F/16). At the output, the A-115 produces a summed mix of the original and the four sub-octaves.
PAGE 2
A-115 DIVIDER System A - 100 Controls: 2. DIVIDER - Overview A-115 In ➊ Orig. Attenuator controlling the amount of the original input signal present at the mix output " 2 F/2: Attenuator controlling the amount of the first sub-octave present at the mix output " 3 F/4: ditto for the second sub-octave 4 F/8: ditto for the third sub-octave 0 5 F / 16 : ditto for the fourth sub-octave ➁ 10 F/4 0 ➀ 10 F/2 ➂ 10 F/8 ➃ F / 16 ➄ 0 10 0 10 Out ➋ 2 1 Orig.
PAGE 3
System A - 100 doepfer 3. Controls 5. User examples 1 Orig. This attenuator controls the amount of the original input signal present in the mix output. 2 F/2 ... DIVIDER A-115 5 F / 16 These attenuators 2 to 5 control the amount of the respective sub-octaves present in the mix output. Say your production needs a stronger bass-line: you can add a square wave an octave below the original signal simply by setting attenuators 1 and 2 to maximum, and attenuators 3 to 5 to 0. 4.
PAGE 4
A-115 DIVIDER System A - 100 Frequency division of external audio The patch in Fig. 2 shows how the A-115 can frequency-divide an external monophonic signal (such as a vocal, flute, or single-note guitar). In A-120 Audio In DIVIDER F/4 ext. Audio In Audio Out Env. Out The ADSR controls a VCA, and closes it as soon as the gate shuts down, so that possible glitches (eg. when the sound of a string is dying away), are avoided. H The ADSR’s release parameter must be set to Zero.
PAGE 5
doepfer System A - 100 DIVIDER A-115 5
PAGE 6
A-115 DIVIDER 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. A-115 DIVIDER A-115 DIVIDER 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.