Skip to content

FREE

Delivery in Netherlands above 150€

Menu
Befaco Slew

Befaco Slew

Regular price €109,00
Sale price Regular price

Product details

Main features

  • Rise/Fallseparate faders for rise and fall times, acting as CV attenuators when patched
  • Shapelinear to time-compensated portamento response
  • Slope detectorRISE and FALL gate outputs while the output moves up or down
  • CV control0-10 V slew time input routable to rise, fall or both

Overview

The Befaco Slew is a 4 HP Eurorack module that limits how fast a voltage can change and detects whether a signal is rising or falling. It suits modular users who want portamento or acid-style slides on stepped sequences, with separate glide speeds for rising and falling notes. It also handles general CV smoothing and gate-to-envelope tasks.

  • Independent rise and fall faders: one-hand control of both slew times. Raising a fader lengthens the slew.
  • Three-position range switch: selects fast, medium or slow time ranges.
  • Shape control: runs from linear slew to a response where larger jumps glide faster, for time-compensated portamento.
  • Voltage-controlled slew time: a 0 to 10 V CV input can be routed to rise, fall or both.
  • Slope detector: dedicated RISE and FALL gate outputs fire while the output is moving up or down.
  • Accurate pitch tracking: tracking error under 1 mV.

In practice the Slew sits between a sequencer and an oscillator to add glide. It accepts any CV from -10 to +10 V, so it can just as easily smooth stepped modulation or tame abrupt changes elsewhere in a patch. Feed it a gate and the rise and fall faders act as attack and release times, giving a simple Attack-Sustain-Release envelope.

When a CV is patched in, the rise and fall faders become attenuators for that input. That makes it easy to modulate one slope while keeping the other under manual control.

The slope detector reads the output, so its sensitivity follows the slew time. At the fastest settings it reacts to very small movements. If ripple in the incoming signal produces unwanted gates, a longer slew time cleans this up. The RISE and FALL gates can trigger events whenever a voltage moves in either direction.

The Slew is designed in Barcelona by Befaco. This listing is the assembled module.

Specifications· 15 details

Format

Width
4 HP
Depth
25 mm (including power connector)

Inputs & outputs

Signal In
-10 V to +10 V
CV In (slew time)
0 to 10 V
Outputs
Signal Out, RISE gate, FALL gate

Controls

Faders
Rise time, Fall time
Range switch
3 positions
Shape
Linear to time-compensated response
CV selector
Rise / Both / Fall

Power

Power draw +12V
20 mA
Power draw +5V
0 mA

General

Functions
Modulation
Height
3U
Synthesizer form factor
Control voltage or gate connectivity
, ,

About the brand

Befaco

Barcelona-based maker of open-source Eurorack modules, sold assembled or as DIY kits. Known for experimental voices such as Oneiroi, hands-on build workshops and designs released under a Creative Commons licence.
Origin
ES
Founded
2010
Products
127
Explore Befaco

What verified customers say

Real feedback from verified Volt Music Store customers

Trusted by Customers

700+ Reviews on TrustedShops.

Huge Modular selection

1000+ Modular products available.

Worldwide Shipping

We will deliver wherever you are.

Want to meet us?

Come to our Showroom in Rotterdam