Pulsers

A-105-4 Quad Poly SSI VCF

Quad polyphonic 24 dB low pass filter

Doepfer · 8 HP · U3

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A-105-4
Quad Poly SSI VCF
F
FM
Q
Lev.
CVF
CVFM
CVQ
CVL
CVF
CVFM
CVQ
CVL
1
2
3
4
FM
FM
FM
In
In
In
Out
Out
Out

Panel · 40.6 × 128.5 mm Drag to explore →

Description

Doepfer's first polyphonic filter: four identical 24 dB low pass filters (SSM2044/SSI2144 type) with common manual controls and common control voltages, each filter with its own FM, audio input and output.

Key features

  • Four 24 dB low pass filters (SSI2144) in 8 HP
  • Common frequency (F), FM intensity (FM), resonance (Q) and input level (Lev.) controls
  • Common CV inputs CVF, CVFM, CVQ and CVL, each with its attenuator; FM depth and input level are voltage controlled by built-in VCAs
  • Per filter: an FM input (typically from its own envelope, e.g. an A-141-4), an audio input and an audio output

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