ACQUA - Indigo



Indigo is a five-plugin suite that embodies several 'must have' iconic units from different brands thathave earned a reputation as leaders primarily in the field of high-end mastering..

What you get

 Indigo includes:

  • INDIGO STEREO TUBE MASTERING EQUALIZER ( EQ1): A 6-Band all Tube Stereo Equalizer based on a tube circuit design from the late 60s, handcrafted in Denmark.
  • INDIGO STEREO TUBE EQUALIZER (EQ2): A 3-Band Tube Mastering Stereo Equalizer with 'Aggression', made in the USA.
  • INDIGO STEREO SHUFFLING PROCESSOR: A Stereo image processing tool with High-Pass and Low-pass filters and a Preamp section.
  • INDIGO OPTO COMP (MONO): Dual-Mono Opto-compressor; Features 3 different switchable dynamics mastering processors and several preamp emulations.
  • INDIGO OPTO COMP (STEREO): Stereo Opto-compressor  features 3 different switchable dynamics mastering processors and several preamp emulations, plus all the consolidated controls by Acustica

Each plug-in included in the Indigo suite comes in a “Standard” version and an alternative “ZL*” version, which operates at *zero latency and is thus suitable for use when tracking, at the cost of extra processing resources. For further details consult the Indigo user's manual in the Overview section.

Indigo stereo tube mastering equalizer ( EQ1)

The Indigo EQ1 features a 6-band Stereo Parametric EQ derived from a rare, all-tube Stereo Mastering Equalizer hand build in Denmark. Probably the most sought-after unit included in this collection.It is based on a tube circuit designed in the 1960s. The operating principle is that of frequency-controlled amplifiers, a topology that allows abetter global phase linearity.y. It is a state-of-the-art equalizer built using only the highest quality components. Equipped with 22 valves, this equalizer shines on any instrument, but mastering is its specialty.

Indigo stereo tube equalizer (EQ2)

The Indigo Stereo Tube EQ 2 is a 3-band Stereo EQ derived from a modern, discrete, class-A tube stereoEQ, with input and output Jensen transformers.  This is a one-of-a-kind, wide-range EQ, so to speak, that focuses on broad-frequency brush strokes rather than honing in on specific frequencies. Thanks to its 'Aggression' control, it can heat up your sound considerably by generating very musical harmonics. Indigo Stereo Tube EQ2 is geared more towards mastering, but its versatility and sonic 'beauty' make it an ideal tone-shaping machine during the production phase.

Indigo  stereo shuffling processor

The Indigo Stereo Shuffling Processor is a Stereo image processing tool characterized by switchable High-Pass and Low-pass filters with a 3 or 12 dB/oct slope, a Tube Preamp section equipped with two different emulations and a transformer-based, valve-buffered stereo processor designed to correct the typical issues of certain stereo mic techniques. Usually, this concept is often associated with the term 'shuffling' invented by Alan Blumlein in the early 1930s; hence the name Stereo 'Shuffling' Processor.This is an ambitious and unusual plugin that pays homage to two different units, dusting off some concepts and techniques that are perhaps a bit outdated today but are part of the history and evolution of the recording world.

Indigo opto comp  (Mono)  & Indigo opto comp (Stereo)

The Indigo Opto Comp dual-Mono and Stereo versions are equipped with 3 different dynamics processors (Mode):

A: derives from the mastering edition of a 'vintage style' Stereo analog optical compressor (manufactured by a renowned Canadian company) hand-made in the '70s using Class A discrete transistor circuitry and classic input and output transformers.

B: derives from a modern optical mastering limiter/compressor, handcrafted in California and basedon classic designs of the early '60s. Simply put, it's thick, warm and it packs a huge tube-y character, and could make a mix that's as flat as a board feel ultra-deep and three dimensional. In short, it's a must-have if you need versatility and solid frequency response during mastering, mixing, or post production.

C: here is where things get fun. This is a 'Frankenstein' compressor we created by merging the maincharacteristics of the previous two models into a single, on-steroids, hefty emulation.




  • Create a user account (if you do not have one yet) on our website
  • Download and Install Aquarius, our products manager, for either Mac or PC
  • Log in to Aquarius using your user email and password.
  • Type the product name in the 'search' field inside Aquarius to find the '(trial)' version of the product, then click on the thumbnail or the 'Install' button. This will take you to the product page (the trial version of a product is also visible in the 'related products' section on the right)
  • Select the right plugin format according to the DAW you are using and click 'Install.'
  • Aquarius will download, install, and authorize the trial product automatically.
  • Run your DAW. You're set!

For details about the installation/authorization process, please refer to this page.

Technical Specs

  • Core 17
  • Available sample rates: 44.1kHz | 48kHz | 88.2kHz | 96kHz


All updates and bug fixes will be available inside Aquarius under the 'Updates' section.
All other trademarks and trade names mentioned on this page are used for identification purposes only and are properties of their respective owners.


ACQUA - Indigo

  • LIST PRICE: €229.00