Acon Digital Multiply Review: The Best Free Chorus VST

Many producers tend to discount the need for a good Chorus effect.

When most DAWs come with a chorus effect pre-installed, why would you need anything else?

The Acon Digital Multiply Chorus is one of the more powerful chorus effects we’ve tried, and it’s free, so picking it up is a no-brainer.

Acon Digital Multiply
4.6

Acon Digital Multiply is a free Chorus plugin that every producer needs. Combine their phase randomizing filters with a great EQ section and tons of modulation and you get one of the best 6 voice chorus effects.



Sound Quality:
5.0
Features:
5.0
Ease of Use:
5.0
Presets:
3.0
Value for Money:
5.0
Pros:
  • Warm chorus sound that can add a beautiful vibe and thickness to any instrument
  • Fantastic EQ built-in for specific control over different frequency ranges
  • Great set of presets to give you a good starting point, including a Rhodes chorus which is brilliant
  • A/B mode to test different chorus settings on the fly
  • Completely free
Cons:
  • May be redundant with your DAW's stock plugin
OS Compatibility: Win11+, Mac 13.0, Apple Sillicon
Plugin versions: VST, VST3, AU, AAX

Multiply Features

acon digital multiply free chorus plugin

Acon Digital Multiply is a free and versatile chorus effect with a unique twist.

Each simulated voice is processed with a phase randomizing filter so that unpleasant comb filter effects are avoided.

The effect can be used to simulate the effect of several performers playing the same tones simultaneously.

You can also use it to widen the spatial image or to create special effects for sound design.

Multiply can simulate up to 6 additional voices and both the pitch and the loudness of the voices can be modulated.

Check out this video review from Higher Hz:

Here’s what you get with the Acon Digital Multiply:

Dry & Wet Controls

Every plugin brand handles dry & wet controls slightly differently.

With Acon Multiply you’ll get one fader for the dry signal and another one for the wet.

Linking them via the lock icon in the middle allows you to adjust the output volume without changing the overall effect balance.

Frequency Modulation

acon digital multiply modulation

Below the volume faders, you’ll find controls for the frequency modulation.

“Depth” controls how much the source will be de-tuned and “Rate” controls how fast the de-tuning happens.

The frequency modulation section makes it possible to create modulated chorus effects that can widen the spatial image.

If you worked with modulation effects before you’re probably already set, to start working with the Acon digital multiply.

Amplitude Modulation

The amplitude modulation works just like the frequency modulation section.

Instead of the tune, however, it modulates the volume.

Going for a high rate allows you to create a tremolo-like effect…

TIP: The Pitch and Loudness of the voices can be modulated by the frequency and amplitude modulation sections. Use this to create unique effects for sound design.

Equalizer

acon digital multiply EQ module

The final section of the plugin is a very nice EQ

It comes with 5 bands & Q-controls.

In addition to the EQ, the Acon Digital Multiply also has a filter section.

You get a low cut, low shelf, high shelf and high cut as well as a bandpass filter shape.

Sure, lots of other VSTs have output filters, but adding a whole EQ section shows that Acon has put thought behind their workflow.

This allows you to really shape the curve in some interesting ways.

Global Settings

acon digital multiply global settings

Multiply works with up to 6 voices.

The amount of voices can simply be adjusted via the “Voice count” control.

Right next to it is the “Stereo spread”, which can set the output signal from fully mono, to fully stereo.

You also get an integrated pre-delay section, that can be adjusted to 500ms.

The pre-delay section makes it possible to create modulated and diffuse echo effects.

We’ll show this more in-depth in our examples.

In general, Multiply is a very well-assembled plugin.

For a free device, you will not find anything that’s as powerful and versatile as Multiply, by Acon Digital.

How Does It Sound?

The Acon Digital Multiply is great for creating space and warmth for your sounds.

Combined with the phase randomizing filter, so that unpleasant sounds aren’t an issue, Multiply is one of our favorite Chorus effects.

Along with Digital Multiply, Acon have provided a few factory presets too. They’re a little on the thin side, including only 10 – but are good starting blocks to build off.

Here are our favorites:

Preset Examples

Original Sample
Default Patch
Rhodes Chorus
Tremolo Piano
Vintage Echo

Multiply Features

  • Phase Randomizing Filter
  • Included 5 band EQ
  • Filter section with low cut, low shelf, high shelf and high cut as well as bandpass filter shapes
  • Simulate the effect of several performers playing the same tone
  • Integrated Pre-Delay section
  • Frequency and Amplitude Modulation
  • Fully re-sizable
  • Available For Windows and Mac
  • VST, VST3 ,AAX and AU formats

Verdict

Acon Digital Multiply
4.6

Acon Digital Multiply is a free Chorus plugin that every producer needs. Combine their phase randomizing filters with a great EQ section and tons of modulation and you get one of the best 6 voice chorus effects.



Sound Quality:
5.0
Features:
5.0
Ease of Use:
5.0
Presets:
3.0
Value for Money:
5.0
Pros:
  • Warm chorus sound that can add a beautiful vibe and thickness to any instrument
  • Fantastic EQ built-in for specific control over different frequency ranges
  • Great set of presets to give you a good starting point, including a Rhodes chorus which is brilliant
  • A/B mode to test different chorus settings on the fly
  • Completely free
Cons:
  • May be redundant with your DAW's stock plugin
OS Compatibility: Win11+, Mac 13.0, Apple Sillicon
Plugin versions: VST, VST3, AU, AAX

Acon Digital Multiply is a free and versatile chorus effect with a unique twist.

Each simulated voice is processed with a phase-randomizing filter

This means that this free and versatile chorus means any unpleasant comb filter effects are avoided.

The addition of an EQ section as well as the integrated pre-delay section makes the acon digital multiply, one of the most versatile chorus effects.

Multiply is a free plugin, that every producer needs in their toolkit.

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