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An introduction to Acon Digital Multiply 2, based on information from the maker and distributors: what it does, how to use it and who it may suit. It is not scored.
Our take on the classic chorus effect, Multiply is built to sidestep the thin, watery comb-filtering that plagues conventional plug-ins.
— Acon Digital official site
What is Multiply 2?
Multiply 2 is a free chorus-type plug-in from Acon Digital. The maker says it is designed to avoid the thin, watery comb-filtering common to ordinary chorus plug-ins.
It simulates up to six additional voices, each processed by a phase-randomizing filter, which the maker says yields natural thickening rather than metallic swirl.
Frequency (pitch) and amplitude (loudness) modulation are independent, each with its own rate and depth. A five-band equalizer and a modulated pre-delay are built in.
Stated uses include thickening as if several performers play in unison, widening a mono source, and sound design. A range of presets is included.
Up to six voices
Up to six extra voices can be added, aiming at the thickness of several performers playing the same part.
Phase-randomizing filters
Each voice goes through a filter to avoid the comb filtering typical of chorus, keeping delay times short.
Independent frequency and amplitude modulation
Pitch drift and loudness movement each have their own rate and depth, from subtle to extreme.
Five-band EQ
Low cut, low shelf, mid bell, high shelf and high cut shape only the effect signal, with adjustable slopes.
Modulated pre-delay
An integrated pre-delay allows diffuse, echo-like effects.
Presets and A/B
Preset manager, user presets, A/B comparison and undo/redo are supported.
Mono and stereo
Mono and true stereo processing are supported, with sample rates up to 96 kHz.
Specifications
| Item | Details |
|---|---|
| Price | Free |
| Max voices | 6 |
| Sample rate | Up to 96 kHz |
| Channels | Mono, stereo |
| Windows | Windows 11, host with VST3 or AAX (Pro Tools 2021+) |
| Mac | macOS 12+, Apple Silicon/Intel, AU/VST3/AAX |
| Recommended | Core i5/Ryzen 5 or better, 4 GB RAM, 1 GB free space |
What is included and system requirements
- Multiply 2 plug-in (VST3/AU/AAX)
- Preset library
- Built-in five-band EQ and pre-delay
How to use it
- Download the free version from the product page.
- An Acon Digital account may be required.
- Install and rescan in your DAW.
- Insert it on a vocal or guitar track.
- Adjust voice count and modulation depth gradually.
- Use the EQ to trim lows or highs of the effect.
- Starting from a preset is also an option.
Thickening vocals
The maker lists thickening vocals and instruments; you might try a doubling-style effect.
Widening mono
It may help widen a mono recording.
Electric piano and guitar
It might add gentle movement to keys and guitars.
Sound design
Large modulation settings may create unusual textures.
Who it may suit
- People looking for a free chorus
- Home recordists wanting to thicken vocals
- Producers wanting to widen mono sources
Good to know before you buy
- The Windows requirement is Windows 11, 64-bit.
- For older or unlisted hosts, the maker advises verifying with the demo.
- A free account may be needed to download.
How it differs from similar products
We do not pick a winner; the official figures are placed side by side.
Space KnobAbletunes Knobs
Multiply 2 is a chorus with up to six voices and a five-band EQ. Space Knob is a one-knob mid-sized reverb.
Price
Please check the official page for the price.
Free (the page says 'Download full version for free').
See Multiply 2 on the product page
Sources: acondigital.com (checked 2026-10-27)
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