VSL Basso Profondo Choir

Choir Virtual Instrument

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    Digital Products

    Digital Products are delivered electronically either via your order status page, or via email.

    No physical product will be shipped to you!

    In most cases, the product you purchase from us is a serial number/license code/activation code to register the product with the manufacturer and download directly from them. This ensures you receive the latest version of products, and the best support when necessary.

    After purchase, your license code and relevant links will appear on your order status page, or they will be sent to you by email.

    For detailed instructions on the registration/download process, you can visit our dedicated page by clicking here: Install Instructions.

Education Proof

Products with education pricing are for students & teachers only. To prove your education status we require that you upload proof in the form of an image/PDF.

Types of proof


Student ID Card, Letter of enrollment, or similar


Teacher ID Card, Lecturer ID Card, Payslip, Letter from the school/college

Education proof is submitted to the manufacturer and is accepted at their discretion.

The Basics

iLok is a copy protection method used by many of our brands.

It has 3 types of activations, iLok USB, iLok Machine, and iLok Cloud.

Different brands/products will offer different iLok methods. iLok USB is always an option, but the availability of iLok Cloud and iLok Machine methods is at the discretion of the software developer.

iLok Account

For all iLok protected products, you will need an iLok account. You can create one for free here: ilok.com/#!registration

iLok License Manager

To manage your iLok licenses, there is a dedicated app called iLok License Manager. This app is used to register, activate, and move your licenses between locations.

You can download the latest installers from the iLok website: ilok.com/#!home

iLok USB Key

iLok USB

This activation is stored on an iLok 2 or 3 USB key.

It is the best option for portability, if you frequently move between multiple machines, and offline use.

iLok Machine ID

Machine ID

This activation is stored locally on your computer.

While this is a convenient way to work offline, and does not require the additional cost of an iLok USB, there is the risk of a license being lost in the case of a drive failure.

This option also requires extra care when you upgrade to a new computer, the license(s) must be deactivated on your old machine first to ensure you do not lose them.

iLok Cloud

iLok Cloud

This activation is based online, and requires a "cloud session" using the iLok License Manager.

It requires an active internet connection for the entire time you use the plugin(s).

The Mysticism Of The Choir's Deepest Voices

The experience of hearing six contrabass singers fill Synchron Stage Vienna's large Stage A with the robust sound of a low C is undeniably mesmerizing, and they can go even lower!

Basso Profondo singers, whose voices are distinguished by their rich, resonant, and profoundly deep vocal quality, stand out for their ability to reach the lower limits of the human vocal range, typically encompassing notes as low as two octaves below middle C (C2) or even lower.

Also called oktavists, they often sing an octave below the bass part as soloists, and to capture an entire ensemble of these exceptionally gifted vocalists was a special treat for our team!

As with the Vienna Boys Choir, the idea for this Collection was born after the production of choral recordings for the Amazon Prime fantasy series "The Rings of Power", the prequel to "Lord of the Rings".

The essential element in Bear McCreary's score is the use of choirs, which were recorded at Synchron Stage Vienna in 2020 and 2021.

At first, we quite frankly questioned whether we could fulfill the composer's wish for a basso profondo choir.

However, working in the musical city of Vienna has its advantages and soon we were able to assemble an astounding ensemble of bass vocalists who were prepared to offer their talents in a choir, not only for the score recordings, but also for the creation of a sample library.

The enthusiasm of the artists is palpable in the recordings of this library.

It was a completely new experience not only for our team, but also for the singers to be able to explore the depths of their voices together as an ensemble.

The pitch range of this unique ensemble spans from a very low A1 to A#3.

Articulations include short notes, long notes, legatos and marcatos of the vowels AA (ah) and UU (oo), also sung espressivo, sforzato, as short and long crescendos, and as short and long diminuendos.

There's also humming as well as a variety of consonants in combination with short and long vowels.

What's more, the wide range of lower register effects and articulations such as "om", "hey", deep shouting, prayer-like performances, rises and falls, laughs, creepy sounds, clusters, and others make this unique library a treasure trove of archaic and other-worldly human sounds.

Multiple Microphone Positions

To capture the spectacular ambience of "Stage A" of Synchron Stage, our engineers employed seven separate phase-coherent microphone configurations to provide a broad range of room options.

All of them are available as separate channels in the mixer section of the Vienna Synchron Player that lets you create the sound according to your needs and liking.

Pre-configured mixer presets provide a wide variety of tonal characteristics, from close to distant, from classic to ambient, from airy to church reverb.

As with all Synchron Libraries, you can mix the Basso Profondo Choir in stereo, 5.1 surround or even Dolby Atmos and 9.1 Auro 3D, or any other immersive audio format.

Microphone Setup

The Standard Library and the Full Library of Basso Profondo Choir both include the same set of articulations.

The difference lies in the number of provided microphone positions:

Standard Library

  1. Close Mic - Stereo
  2. Mid Mic - Stereo (L/R)
  3. Main/Room Mic - Decca Tree Stereo (L/R)
  4. Main/Room Mic - Decca Tree Mono (Center)

Full Library

  1. Close Mic - Stereo
  2. Mid Mic - Stereo (L/R)
  3. Main/Room Mic - Decca Tree Stereo (L/R)
  4. Main/Room Mic - Decca Tree Mono (Center)
  5. Main Surround - Stereo (L/R)
  6. High Stereo (3D) - Stereo (L/R)
  7. High Surround (3D) - Stereo (L/R)

System Requirements

  • MacOS 10.14 Mojave and above
  • Windows 10 and above (64-bit only)
  • Intel, AMD, or Apple Silicon CPU
  • 16GB RAM or more
  • 3GB free storage space for Standard Library
  • 5.7GB free storage space for Full Library
  • Free iLok account and iLok License Manager
  • iLok Cloud and iLok USB licensing methods are supported

Plugin Formats

AAX Native, AU, VST2, and VST3

Crossgrade Proof

This crossgrade is for owners of a competing DAW. To prove your DAW ownership, we require that you upload proof in the form of an image/PDF.

Types of proof

A copy of your purchase receipt for the original license or the most recent update/upgrade

A screenshot of your product registration

A photo of your package (either CD/DVD or printed manual), with the unique serial number included in the photo.