Doepfer A-189-1 Voltage Controlled Bit Modifier / Bit Cruncher

Item 26 of 69
€ 110,00 (including VAT / BTW)
Stock 2 pcs.

Module A-189-1 is a voltage controlled bit modifier. 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:

Switch positionFunctionRemark
1bit crushingBC controls the number of bits (bit reduction)
2ANDSignal AND BC 
3ORSignal OR BC
4XORSignal XOR BC
5bit shift rightBC controls the number of bit shifts
6bit shift leftBC controls the number of bit shifts
7multiplicationSignal x BC
8compare & complementif signal > BC then output = bit complement of the input signal, otherwise unchanged
9compare & absoluteif signal > BC then output = absolute value of the input signal, otherwise unchanged
10additionoutput = signal + BC (with overflow/clipping)
11addition with BC swapsame as 10 but with nibble swap of BC (nibble = half byte, i.e. four bits)
12short delay 1 with dynamic normalizationBC controls the length of the delay memory
13short delay 2same as 12 but different length/feedback
14short delay 3same as 12 but different length/feedback
15short delay 4same as 12 but different length/feedback
16four stages FIR filterBC  controls the filter coefficient

Remark: Module A-189-1 is the first derivative of the universal AD/DA module. More modules derived from this basic idea are planned for the future (e.g. CV delay, CV modifier including Hz/V-to-V/Oct, digital waveshaper/multiplier, clocked audio delay).

Width: 8 TE / 8 HP / 40.3 mm
Depth: 60 mm

Current: 50 mA

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