Instruction Manual

ManualsBrandsDoepfer ManualsAudioA-163 Voltage Controlled Divider

doepfer

System A - 100

VC Frequency Divider

A-163

1. Introduction

Module A-163 is a voltage controlled audio fre-

quency divider.

The frequency of the input signal (preferably the rec-

tangle output of a VCO) is divided by an integer factor

(N = 1, 2, 3, 4 ... up to about 20). The

output

waveform is rectangle with 50% duty cycle.

The

divisor N

can be adjusted

manually

and modula-

ted with an external control voltage (e.g. from LFO,

ADSR, Random, MIDI-to-CV, Theremin, Light-to-CV,

analog sequencer) with attenuator.

The following table shows the differences between the

divider modules available in the A-100 system.

A-115 A-113 A-163

Divisor

setting

fixed manually voltage contr.

+ manually

Divisor

range

2, 4, 8, 16 1... 24

integer

1... 20

integer

No. of

outputs

(mixed)

(mixed+single)

Output

waveform

rectangle sawtooth rectangle

Manual

CV In

A-163

VDIV

Out

Summary of content (6 pages)

PAGE 1
System A - 100 doepfer VC Frequency Divider A-163 1. Introduction A-163 VDIV CV CV In In Manual Module A-163 is a voltage controlled audio frequency divider. The frequency of the input signal (preferably the rectangle output of a VCO) is divided by an integer factor N (N = 1, 2, 3, 4 ... up to about 20). The output waveform is rectangle with 50% duty cycle. The divisor N can be adjusted manually and modulated with an external control voltage (e.g.
PAGE 2
A-163 VC Frequency Divider System A - 100 Controls: 2. Overview A-163 1 Manual: Control for manual setting of the integer dividing factor N VDIV 2 CV : VC Frequ. Divider 0 10 level CV In CV -5 +5 In Out Symmetric (negative-0-positive) attenuator for control voltage at input ! • fully clockwise: max. positive level • middle position: level 0 • fully counterclockwise: max.
PAGE 3
System A - 100 doepfer 3. Controls VC Frequency Divider A-163 H The term "subharmonic" is not quite correct as the A-163 output waveform is rectange with a marked harmonic spectrum in contrast to the “pure” sine waves used in the harmonics theory. For details concerning harmonic contents of different waveforms please refer to the A-110 or A-111 manual (VCO´s). For details about subharmonics please refer to the A-113 manual. 1 Manual With knob 1 the divisor N is manually adjusted.
PAGE 4
A-163 VC Frequency Divider System A - 100 doepfer 4. In- / Outputs 5. User Examples ! CV In Sub-Oscillator The external control voltage (e.g. from an LFO or ADSR) used to modulate the divisor N is fed into the CV input ! . With the A-163 an audio sub-oscillator can be realized very simply. The rectangle output of a VCO is connected to the audio input of the A-163. The audio outputs of the VCO (e.g. sawtooth) and the A-163 are mixed together e.g. with an A-138b.
PAGE 5
doepfer System A - 100 In fig. 1 the triangle signal of a LFO (e.g. A-145) is used to control the divisor N of the A-163. As only integer divisors occur both time and frequency quantization takes place. A so-called "subharmonic glissando" appears, i.e. separate tones with the same length are generated (subharmonics derived from the master frequency of the VCO signal). VC Frequency Divider A-163 Frequency Multiplication In combination with the PLL module A-196 frequency multiplication can be obtained.
PAGE 6
A-163 VC Frequency 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-163 VDIV VC Frequ. Divider Manual 0 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.