Sinevibes Integer Review: The Korg Multi-Engine Delay That Earns Its CPU

If you're wondering whether Integer is a standalone Korg synth you missed, it isn't. Integer is a Multi-Engine plugin from Sinevibes, and it installs directly into compatible Korg hardware to replace or extend the built-in effects engine. The doubt most buyers carry into this purchase is fair: is a third-party effect for a hardware synth actually worth the friction of tracking down, paying for, and installing? After running it hard on a prologue and an NTS-1 mkII, we'd say yes, with one clear caveat about who it's wrong for.

Integer launched in March 2025. Sinevibes has been building Mac Audio Units since 2006, and their hardware Multi-Engine work has been consistent: purpose-built algorithms that do things the stock engines don't.

This one is built for Korg prologue, minilogue xd, NTS-1, NTS-1 mkII, NTS-3, and the microKORG2.

Does Integer Actually Deliver What Sinevibes Promises?

The core concept is a variable sample-rate delay. A fixed buffer stores incoming audio, and as you stretch the delay time, the sample rate degrades. Short delay times sound relatively clean. Push the time out and the audio gets coarser, grainier, lower-fidelity.

Sinevibes describe it as "a model of a delay that never existed but should have." That's a good line, and it holds up. This isn't a Bucket Brigade Device emulation of any specific unit. It's an original algorithm that behaves like analog without pretending to be a Roland RE-201 clone.

We fed sustained pad chords through Integer on the prologue and watched the texture shift as we moved the time knob slowly. The degradation isn't random noise. It's controlled grain that responds to what's playing.

Satisfying. That's the only word for that specific moment.

The effect covers delay, chorus, flanger, loop generation, drone layering, and brick-wall filtering. That's a lot of territory for a single Multi-Engine slot.

Where Integer Shines

The pitch glide on delay time changes is the feature we kept coming back to. When you turn the delay time knob while audio is playing, Integer doesn't snap to the new time. It glides. The pitch of the delayed signal bends up or down, exactly like a tape machine spooling to a new speed.

We were running a bassline through the NTS-1 mkII, manually sweeping the time knob during a breakdown. The delayed notes smeared downward in pitch, then settled. No DAW required. No automation drawn in. It happened with a hand on a knob.

That's dub production on hardware, and it's clever.

The feedback limiter is the other strength worth calling out. You can push feedback to the edge of self-oscillation without it blowing up. The limiter catches the signal before it hits runaway. We ran feedback at maximum for 40 seconds on a 400ms delay time. It looped, it built texture, it never clipped the output.

For live performance or experimental recording, that safety net matters.

The brick-wall filtering at extreme sample-rate reduction is brutal in a good way. At very short buffer times the high frequencies are severed cleanly, not rolled off. It sits differently in a mix to a low-pass filter. More aggressive. More lo-fi. Works best for drum processing and electronic textures.

Where Integer Falls Short

The audience is narrow. If you don't own a prologue, minilogue xd, NTS-1, NTS-1 mkII, NTS-3, or microKORG2, Integer does nothing for you.

Some early coverage mentioned a VST version. We couldn't verify this exists as a current product for DAW use. What we found is a Multi-Engine plugin for Korg hardware. If you're reading this hoping to drop Integer into Ableton as an insert, that's not what this is.

Annoying, but also not Sinevibes' fault. The framing in some places is misleading.

The parameter set is intentional and minimal, which we respect. But if you want deep modulation routing, assignable envelopes, or per-voice delay on a polyphonic patch, Integer won't get you there. It operates at the effects level, not the modulation matrix level.

We also wish the pricing were public. Check the manufacturer's site for current pricing.

How Integer Stacks Up Against the Alternatives

The direct comparison is Sinevibes' own catalogue. Their Sinevibes plugin library includes other Multi-Engine effects like Corrosion (distortion and decimation) and Torsion (phaser and filter). Integer is the delay specialist.

If you want pure delay character on Korg hardware, Integer is the strongest dedicated option we've found in this category. Corrosion overlaps on the lo-fi degradation territory but doesn't give you the time-based pitch glide.

Outside the Multi-Engine world,

a comparable ITB experience would be something like Valhalla Delay review running into a hardware output. You’d get more routing options and a full DAW parameter set. But you’d lose the hands-on knob interaction that makes Integer interesting live.

For producers who want experimental delay without a laptop onstage, Integer wins that argument.

Is the Price Fair?

Check the manufacturer's site for current pricing, because Sinevibes doesn't advertise it prominently and it changes with regional currency.

What we can say: Sinevibes Multi-Engine plugins have historically sat in the $20-$29 range. If Integer lands there, it's fair for what it does. A dedicated delay algorithm with this much character, on hardware you already own, at the cost of a dinner is reasonable.

If it's priced above $40, we'd want a trial first. Look for a demo mode or time-limited version before committing.

Score Breakdown

Category	Score	Notes
Sound Quality	4.5/5	The sample-rate degradation curve sounds organic, not digital-broken
Value for Money	3.5/5	Good if priced sub-$30; less clear above that without a trial option
Ease of Use	4.0/5	Korg Sound Librarian install is straightforward; parameter set is lean
Features	4.0/5	Delay, chorus, flanger, brick-wall filter, and drone from one engine slot
CPU Efficiency	N/A	Hardware DSP only, no host CPU load
Overall	4.2/5	Brilliant for the right hardware; invisible to everyone else

Alternatives Worth Considering

If you own the compatible hardware and want to see Integer's full context, check our best Korg Multi-Engine plugins roundup for the strongest third-party options across all categories.

Sinevibes Corrosion is the closest sibling. It handles bit-crushing, distortion, and frequency decimation in the same Multi-Engine slot. If you want grit more than time-based effects, that's the pick. Sinevibes Corrosion review

Empress Effects Echosystem is a hardware delay pedal worth mentioning for live players. It doesn't install into a synth, but if you want deep delay character and you're not committed to the Korg ecosystem, it covers more performance-oriented ground. It costs significantly more. best hardware delay pedals

For pure ITB experimental delay, Valhalla Delay covers more algorithmic ground and works in every DAW. That's a different use case, not a direct alternative, but worth knowing exists.

Integer is a niche tool that does its job brilliantly. The pitch glide on delay time changes is the kind of feature you use once and then build sessions around.

Buy it if you own compatible Korg hardware and want a delay effect with real character. Skip it if you don't own that hardware, full stop. There's no version of Integer for anyone else, and no amount of enthusiasm for the algorithm changes that.