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Analogue  Modular  System  A-100

Width

HP

Depth

mm

Current

mA

Lighning Flash

Owners Manual

Voltage Controlled Bit Modifier / Bit Crusher

The A-189.1 is the first derivative of the universal AD/DA module. It offers several voltage controlled algorithmic functions like voltage controlled bit crunching, bit shifting (with/without carry over), bit exchange, rectifying, absolute value and calculating operations like addition, subtraction, multiplication or division.


The module has two control units both with manual control and CV input with attenuator: one for the algorithmic function according to the selected mode (e.g. number of shifted bits): BC and BC CV and one for the sampling rate (SR and SR CV).


The signal input is equipped with an attenuator. As the module is DC coupled even control voltages can be processed. The mode (e.g. bit crunching, bit shifting, bit exchange) is selected by a 16-position rotary switch








No manual available

8

60

10HP

50

10HP

A-189.1  

Doepfer A-189.1

Mode

Function

Comments

1

Bit crushing

BC controls the number of bits

2

AND

Signal AND BC

3

OR

Signal OR BC

4

XOR

Signal XOR BC

5

Bit shift right

BC controls bit number of bit shifts

6

Bit shift left

BC controls bit number of bit shifts

7

Multiplication

Signal X BC

8

Compare & Complement

if signal > BC then output = bit complement of the input signal, otherwise unchanged

9

Compare & Absolute

if signal > BC then output = absolute value of the input signal, otherwise unchanged

10

Addition

output = signal + BC (with overflow/clipping)

11

Addition with BC swap

same as 10 but with nibble swap of BC (nibble = half byte, i.e. four bits)

12

Short Delay 1

with dynamic normalization BC controls the length of the delay memory

13

Short Delay 2

same as 12 but different length/feedback

14

Short Delay 3

same as 12 but different length/feedback

15

Short Delay 4

same as 12 but different length/feedback

16

Four Stage FIR Filter

BC controls the filter coefficient