Description

Slimline Slew Limiter

CV/Audio slew (lag processor) with independent Rise/Fall, CV & Shape for Eurorack in 2HP

Dive into subtle motion shaping with a slew limiter that turns hard steps into musical movement. Where CV would normally “snap”, the Slimline Slew Limiter creates smooth transitions: pitch glides instead of jumping, random voltages become organic drift, and stepped modulation turns into gentle curves. The result isn’t just “smoother” — it’s more controllable, repeatable, and often simply more musical, because your patch no longer catches on edges.

In modern Eurorack patches where many sources meet (sequencers, S&H, random, stepped envelopes, quantised CV, macro controllers), unwanted artefacts appear quickly: zipper noise on filter sweeps, audible steps in subtle modulation, or sharp transients when parameters switch too fast. A slew limiter is elegant “patch hygiene”: it lets you shape the speed of change — from almost invisible smoothing to deliberate, performable glide that feels like an instrument.

Why a slew limiter?

• Portamento/glide for pitch CV: mono lines instantly feel more alive and less “stiff”
• Smoothing stepped modulation: less zipper noise on filters, VCAs and waveshapers
• Organic drift from random/S&H: hard jumps become floating trajectories

2HP compact — maximum control over motion

Space is always tight, which is exactly why a slew limiter belongs to the utilities you want within reach all the time. At only 2HP, the Slimline Slew Limiter drops into any Eurorack system without stealing room — yet it’s the kind of tool that quietly improves countless patches, or steps forward when you want movement as a musical element. Instead of rebuilding a patch, you simply shape time: how fast may a parameter respond? how soft should a change be? and when should a transition feel “snappy” without hard clicking?

A good slew limiter doesn’t feel like an effect, but like an extension of your control. Place it wherever changes are created: between sequencer and oscillator, between random and filter, between macro CV and VCA — or even between gate and a destination module to turn triggers/gates into smooth, performable curves.

Independent Rise & Fall — transitions to taste

The core: separately adjustable Rise (up) and Fall (down) times. This lets you decide independently how quickly your signal moves up and down. It’s more than convenience — it’s a creative lever. Asymmetric settings can make a simple modulation “speak”: slow rise with fast fall for pumping accents, or the opposite for swelling builds that snap back. Especially on filter CV or drive, you get a controlled, musical gesture that stays stable in the mix.

And yes: for classic glide it’s gold. A gentle rise shapes pitch “up‑glide”, while a fast fall keeps tight returns — or flip it for intentionally lazy descents. Portamento becomes a style tool, not an on/off switch.

CV control over Rise/Fall — living dynamics

A unique feature is external CV over the Rise and Fall times. Now your slew isn’t just set — it’s played. Tie smoothing to your performance: an envelope can shorten the times for punchy passages while quiet parts melt away; a slow LFO can breathe between “precise” and “floating”. When multiple modulation sources compete, this becomes powerful: a macro controller can move the parameter, and the slew limiter decides how quickly that movement is allowed to happen musically. You avoid hectic parameter jumps without losing expression. Especially live, it’s a safety net: your hand movement stays expressive, but the system reacts in a controlled way.

Shape control — from linear to musical curves

With the Shape control you morph the curve across a wide range. Linear is direct and technically clean; exponential often feels more natural and punchy; logarithmic can “settle” subtly and let transitions land elegantly. It sounds like a detail, but this is where a slew limiter gets its character: Shape decides whether a glide feels even, or like organic acceleration and deceleration.

It lets you design motion: filter sweeps gain “handwriting”, pitch glides feel less sterile, and random modulation can sound like natural instability rather than numbers being swapped.

Clean signal path — utility, not compromise

The Slimline Slew Limiter is meant as an always‑on utility: patch it, forget it (in the best way), and enjoy how everything reacts more stable, softer and more controllable. Whether you smooth audio‑like modulation, calm sensitive CV paths or tame performative macros, the key is that behaviour stays reliable and not “accidentally” different from patch to patch. That’s how a system starts to feel higher‑end: motion no longer stumbles, it’s guided.

Typical applications

• Portamento/glide for pitch CV between sequencer and VCO
• Smoothing random/S&H into organic drift (filter, PWM, timbre)
• Reducing “zipper noise” on stepped modulation of cutoff, drive or morph
• Softening macro CV (fader/joystick) for live‑ready performance
• Asymmetric movement via separate Rise/Fall times for pump/swell effects
• Creative curve shaping with Shape — from precise to organic