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Doepfer A-171-2 VCS Voltage Controlled Slew Processor / Generator

Doepfer A-171-2 VCS Voltage Controlled Slew Processor / Generator main image

Doepfer A-171-2 VCS Voltage Controlled Slew Processor / Generator

$120.00 to $154.00 Price Tier: Budget

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Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated July 4, 2026.

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$121.41 7 available New

$107.11 2 available Used

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4.9 (16)

$121.00 $120.00 $1.00 · All time low

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$154.00

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Average Price: $126

Budget/Beginner

$149

$350+

Price Tier

In the Modular Synthesizers category, Doepfer A-171-2 VCS Voltage Controlled Slew Processor / Generator is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

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Price History

Based on price data from 2 merchants for "Doepfer A-171-2 VCS Voltage Controlled Slew Processor / Generator". Prices shown reflect NEW condition. Tracking began Apr 19, 2026.

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Description

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The Doepfer A-171-2 VCS Voltage Controlled Slew Processor / Generator is a versatile and essential module for any modular synthesizer setup. It excels in transforming your soundscapes by offering dynamic voltage control that can both shape and animate your music. This module is designed to handle a variety of tasks, from simple slew processing to complex envelope shaping, making it a must-have for sound designers and experimental musicians alike.

Its adjustable slew-up time and switchable curve modes (linear/exponential) give you precise control over how your signals evolve over time. Whether you're smoothing out step sequences or creating unique modulation patterns, the A-171-2 provides the tools you need to push your creative boundaries. Designed to fit seamlessly within the Eurorack format, this processor is as practical as it is powerful.

Key Features:

Adjustable slew-up time for precise control
Switchable curve modes: linear and exponential
Compatible with Eurorack format
Power requirements: +30 mA (+12V) / -30 mA (-12V)

Product specs

Available since	June 2013
Width	8 TE / HP

FAQs

What functions does the Doepfer A-171-2 VCS provide in a modular synthesizer setup?: The Doepfer A-171-2 VCS acts as a voltage-controlled slew processor and function generator, offering features like envelope generation, LFO, and portamento effects, making it versatile for various modulation tasks in a modular setup.
How does the Doepfer A-171-2 compare to traditional envelope generators?: Unlike traditional envelope generators, the Doepfer A-171-2 VCS can function as a slew limiter, LFO, or envelope generator, providing more flexibility and control over rise and fall times with voltage control.
Is the Doepfer A-171-2 suitable for beginners in modular synthesis?: Yes, the Doepfer A-171-2 is suitable for beginners due to its straightforward interface and multifunctionality, allowing users to explore various modulation techniques without overwhelming complexity.
Can the Doepfer A-171-2 be used for audio rate modulation?: Yes, the Doepfer A-171-2 can be used for audio rate modulation, enabling it to generate complex waveforms and modulate other modules at audio frequencies.
What are the dimensions of the Doepfer A-171-2 in a Eurorack system?: The Doepfer A-171-2 occupies 8 HP in a Eurorack system, making it a compact and efficient choice for modular setups with limited space.

Videos

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Computing.Sound

Doepfer A-171-2

Computing.Sound

Doepfer A-171-2 VCS as a Low Pass Gate

京浜マテリアル - Keihin Material

Doepfer A-171-2 multi-functions demo

Chip Tüna Sound Workshop

Just a Minute - Cycled Doepfer A-171-2 Slew Limiter

Stefan Tretau

3x Doepfer A-171-2 VCS + 1x Korg SQ-1

Computing.Sound

Doepfer A-171-2 VCS Wave Shaping with Sport Modulator

京浜マテリアル - Keihin Material

Reviews

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PROS

Versatile multitool: LFO, Envelope Generator, Low-Pass-Gate, and more
CV control of linear/exp response enhances modulation possibilities
Cycle switch turns it into a VCLFO for diverse waveform creation
Excellent for creating aggressive percussive envelopes
Mechanical cycle switch retains state after power down
Offers unique response characteristics with CV pots for subtle control
Preferred over Maths as an Envelope Generator for its snappier sound

CONS

Outputs only +5V, may require adjustment for some modules
Relatively deep module, not ideal for shallow cases
Higher price due to licensed design and features

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-171-2 VCS Voltage Controlled Slew Processor / Generator.

Features and functionality

0 0

The Mother-32's sequencer operates on a non-standard voltage range of -5/+5V, different from the typical 0-10V, impacting compatibility with other sequencers.
Source

Mods and upgrades

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It's advisable to use a Pico Mscale to convert voltages when pairing the Mother-32 with different sequencers due to its unique voltage range.
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Use cases and applications

0 0

The Verbos Voltage Multistage is praised for its ability to create techno patterns through simultaneous slider and switch adjustments, though it's not ideal for conventional pitch sequencing.
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Comparisons

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The Korg SQ-1 is recommended for its affordability and on-the-fly note changes, offering performance tricks suitable for sequencing modular gear like the Mother-32.
Source