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Sound Processing

The sound processing category includes modules that modify incoming audio signals. It features classic components like filters, as well as resonators or ring modulators. Whether legendary designs from Cwejman, experimental circuits from Rossum, or simply good modules from Doepfer—the choice is truly extensive. The wide range of possibilities for connecting individual components—whether for audio or control signals—enables unique results when using modular systems.
Filter products
Analogue Systems-Analogue Systems RS-215 Eight Octave Filter 120240_1
RS-215 Eight Octave Filter
Analogue Systems
Filterbank module with eight fixed filter frequencies, each one octave apart. It is the successor of the RS-210 which was based on a rare 70ies filter bank from EMS. The newer version has different frequencies for a wider frequency range and the filter ha […]

€259.00

In stock

Net: €217.65
Analogue Systems-Analogue Systems RS-360 Phase Filterbank 120253_1
RS-360 Phase Filterbank
Analogue Systems
The RS360 Vocal / Phase Filter contains three voltage controlled resonant multimode filters that are summed at the outputs. The low pass and high pass filters with a slope of -24db/octave whilst the band pass and notch filters work with -12dB slope

€468.00

In stock

Net: €393.28
ADDAC Systems-ADDAC - 601 VC Fixed Filterbank 120198_1
601 VC Fixed Filterbank
ADDAC Systems
The ADDAC 601 module is an analog fixed filter bank with eight frequency bands. Each band features voltage control of amplitude and a separate envelope follower. A number of audio outputs and many possibilities make this filter bank a superior unit

€399.00

Pre Order 16 October 2026

Net: €335.29
Details
Doepfer Musikelektronik GmbH-Doepfer A-196 PLL (Phase Locked Loop) 120187_1
A-196 Phase Locked Loop PLL
Doepfer
A phase-locked-loop module that - said in few words - synchronises the internal high-speed oscillator to an external audio signal. Of course there are some sidetones because this process doesn´t happen perfectly in real time and is a little "lethargic"

€78.00

In stock

Net: €65.55
Doepfer Musikelektronik GmbH-Doepfer A-102 Diode Low pass Filter 120073_1
A-102 Diode Low Pass
Doepfer
The A-102 Module from Doepfer offers a unique filtering experience with its classic diode filter design

€88.00

In stock

Net: €73.95
Doepfer Musikelektronik GmbH-Doepfer A-103 18dB LP Filter (303) 120074_1
A-103 18dB LP Filter
Doepfer
18dB low pass filter based on a modified Moog cascade. Resonance goes up to self-oscillation. The module sounds similar to the TB-303.

€89.00

In stock

Net: €74.79
Doepfer Musikelektronik GmbH-Doepfer A-104 Trautonium Formant Filter 120075_1
A-104 Trautonium Formant Filter
Doepfer
Based on the formant filter form the Trautonium the A-104 offers four resonant filter, switchable between low pass and band pass. Especially in band pass mode is good for creating static resonances, formats and vocal sounds

€139.00

In stock

Net: €116.81
Doepfer Musikelektronik GmbH-Doepfer A-106-1 X-Treme Filter 120077_1
A-106-1 Xtreme Filter
Doepfer
More than a MS-20 filter clone! X-tremly flexible 12dB lowpass and 6dB highpass with separate ins for the filters and endless combinations of how to mix the filters and their polarities. An extreme, exceptional and experimental module with very strange be […]

€119.00

In stock

Net: €100.00
Doepfer Musikelektronik GmbH-Doepfer A-108 48dB LP Filter (Moog) 120081_1
A-108 6/12/24/48 dB Low Pass Filter
Doepfer
The A-108 is a classic Moog lowpass filter with up to 48dB slope and a very soft and round sound. There are four lowpass outputs for 6, 12, 24, 48dB and also a banpass output

€154.00

In stock

Net: €129.41
Doepfer Musikelektronik GmbH-Doepfer A-113 Subharmonic Generator 120088_1
A-113 Subharmonic Generator
Doepfer
A sound source for generating subharmonic minor-chords like in the Trautonium. It contains four parallel frequency dividers with factor 1-24, which derive fixed partial frequencies - the so called subharmonics - out of the frequency of an external  master […]

€249.00

In stock

Net: €209.24
Doepfer Musikelektronik GmbH-Doepfer A-115 Audio Divider 120090_1
A-115 Audio Divider
Doepfer
Fourfold frequency divider for creating up to four suboctaves. Separate controls for the level of the original frequency, 1/2 frequency (1st sub octave), 1/4, 1/8 and 1/16. The output signals are symmetrical square waves

€65.00

In stock

Net: €54.62
Doepfer Musikelektronik GmbH-Doepfer A-127 VC triple resonator 120099_1
A-127 VC Triple Resonance Filter
Doepfer
Three parallel, voltage controlled, resonant bandpass filters (each switchable to lowpass per jumper), each with an own LFO or CV input with attenuator. Separate outputs for each filter and a mixed output. Very well suitable for living filtering or as a f […]

€199.00

In stock

Net: €167.23
Doepfer Musikelektronik GmbH-Doepfer A-128 Fixed Filterbank 120100_1
A-128 Fixed Filter Bank
Doepfer
Fixed filterbank with a low pass, thirteen bandpass filters and one high pass. Each filter has a level control which even enables you to mute the specifical band

€225.00

In stock

Net: €189.08
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