Review: GRM Tools Atelier

INA GRM has recently expanded its renowned collection of audio plugins and standalone applications designed for sound design, sonic exploration, and experimental music with a new modular environment for creative sound manipulation and generative synthesis. In our latest review, NoiseQuest’s Josh shares his thoughts on Atelier.

Summary

Atelier by GRM Tools is a truly unique hybrid creative tool that seamlessly morphs between sound generation and audio effect processing. The suit of modules inspires experimentation at every stage of the sound design process, and the platform’s commitment to controlled and customisable randomisation primes the user for infinite sonic exploration.

Pros:

• An excellent selection of high-quality, deeply inspiring Processors and Modulators.
• Atelier can be deployed as an instrument and an audio effect.
• There is a dizzying array of parameters to modulate, mangle, tweak, and process.
• The design and implementation of the platform is intuitive, immersive, and deeply rewarding.
• Fantastic control over randomisation capabilities.
• Atelier truly captures the spirit of experimentation and sound exploration.
• Comprehensive MIDI Mapping and Automation capabilities.
• Full, multichannel support for immersive, spatial sound design.

Cons:

• More routing options (e.g. Mid/Side) for the processing chain would be a welcome addition.
• No independent presets for the individual modules/processors.
• It’s not possible to independently manage multiple modulation routings from the source Modulator.
• The introduction of a Modulation Matrix could help to manage complex routings.
• Processing modules cannot be used as Modulation sources.

Intro

The history of GRM Tools owes its origins to musical royalty. Pierre Schaeffer—credited as being the ‘godfather’ of Musique Concrete—established the Groupe de Recherche de Musique Concrète in Paris, in 1951, which later changed its name to Groupe de Recherches Musicales (GRM) in 1958. GRM has thus stood at the cutting edge of electronic music since its inception, also making significant contributions to France’s subsequent generation of artists, musicians, and creatives through the Institut national de l’audiovisuel (INA). GRM is therefore an institutional beacon in France’s musical landscape that has left an indelible imprint on the evolution of electronic music.

It is against this backdrop that much excitement was generated throughout the music production community when GRM Tools announced that they were working on a new plugin—Atelier. Designed to capture and evoke the spirit of Musique Concrete with refinements and augmentations cultivated for modern sensibilities, Atelier is described by GRM Tools as “a sandbox for the curious, a platform for exploring endless sonic ideas”. Below, we explore this fascinating sound generation tool and its compendium of quirky modules.

Interested readers can view the following link for an excellent primer on GRM’s history called ’The Pioneers’ by Google Arts & Culture.

Design & Features

Atelier (see image below) features a beautiful, minimalistic aesthetic optimised for working in the box.

Divided into four distinct sections, Atelier subscribes to the following layout:

1. Upper Panel (Red Box): This section houses Atelier’s comprehensive suite of Processing Modules.
2. Lower Panel (Green Box): Modulators reside in this section. They can easily be routed to each other and the Processing Modules in the Upper Panel via draggable virtual patch cables.
3. Bottom Panel (Purple Box): Contains essential operations, such as Settings, an Information bar, Automation and MIDI (Musical Instrument Digital Interface) Mapping, and Preset/Patch management.
4. Right Panel (Yellow Box): Contains global parameters for Randomisation, Morphing Time, and Output Recording. It’s also equipped with a basic Meter, as well as a Peak Limiter to control the final output of the audio signal.

Global Behaviour

The look and feel of the individual modules is clean and consistent, with each one being freely draggable, resizeable, and readily accessible for processing and modulation tasks. Whilst each module serves a specific function, there are some global settings that are important to highlight, especially as it pertains to the Processors in the Upper Panel (see image below).

Randomisation is a core feature that is built into every stage of Atelier’s workflow, and its implementation is superbly executed. Cascading from the top down, users can engage randomisation globally via the dice icon in Atelier’s Right Panel (mentioned previously and discussed below). This same icon is located on many of Atelier’s self-contained modules (orange boxes), confining the randomisation to the relevant module. For further granularity, the individual parameters within each module can also be randomised simply by pressing ‘R’ upon selection. Crucially, parameters can be ‘locked’ to prevent them from being affected by unwanted randomisation at any level.

Engaging Pitch Quantisation (green boxes) ensures that frequencies generated by the module are snapped to the closest semitone. This provides users with the ability to introduce pitch drift, or keep everything perfectly in tune.

Modules are equipped with eight Snapshots (blue boxes) that preserve independent parameter states and settings. This allows users to freely experiment without fear of losing their work, but it’s important to highlight that copying and pasting between Snapshots is unfortunately not yet available.

As a result of Atelier’s innovative Multichannel Support (discussed below), each Processor is capable of generating multiple audio sources. These sources can either be manipulated individually, or collectively via the sliders at the bottom of each module (red boxes). Certain modules also enable users to alter the frequency or pitch of multiple sources whilst maintaining their relative distance from one another (purple boxes). The utility of this feature is dependent on the Processor and its role in the processing chain.

Atelier’s Right Panel (click to see image) contains essential functions that impact global behaviour.

The ability to record Atelier’s output (yellow box) ensures that users can easily capture the many happy accidents that occur when working with Atelier, thus reinforcing its pedigree as an elite experimental tool. Much has already been discussed regarding Atelier’s implementation of randomisation, which is engaged globally from this panel (red box), with an additional slider to adjust the intensity of the applied randomisation. The Morphing slider (green box) is a thoughtful addition that slurs the time it takes for Atelier to shift between parameter states. Longer settings introduce a noticeable glide when randomising Atelier or switching between the eight Snapshots located in the Processors (discussed above). Depending on one’s use-case, this can produce a highly creative effect that lends itself to experimental sound-design.

Processors & Modulators

Atelier is equipped with eleven modules divided across two categories: Processors and Modulators. Whilst this may initially appear to be a modest selection, each module is packed with features–many of which function in unique and surprisingly innovative ways.

Processors

Central to understanding Atelier, and the manner in which its modules process audio, is the concept of Multichannel Processing. Typically, the arrangement of audio across the panorama is reserved for the mixing stage, but Atelier encourages users to experiment with stereo and surround placement as a compositional feature. With support for up to 32 Channels, users are really only limited by the number of audio outputs linked to their system, and by the processing power of their computer.

The number of active channels within a Processor are indicated by colour-coded dots (see image above–purple box) located in the Processor’s “Cursor Area”. Since this review was conducted with a simple stereo setup, the two colours represent the left and right channels. Here, we can see that a total of four signals are being generated by the module, with both the left and right channels receiving two signals each. It’s worth noting the following behaviour:

1. Adding a signal to a Processor’s Cursor Area is as simple as clicking directly on the interface, which functions as a XY Pad. Double-clicking on a signal will remove it.
2. Atelier will automatically assign all the created signals to one of the available audio outputs, with more outputs resulting in a greater selection of colour-coded dots.
3. Created signals can be freely dragged around the XY Pad. Depending on the chosen Processor, this will have a considerable impact on the effect throughout the processing chain.

Equipped with this foundational understanding, we’re now ready to explore Atelier’s modules in greater detail.

Play
There is perhaps no other module that more directly connects Atelier to its historical Musique Concrete roots than Play (see image below).

Like the early pioneers experimenting with audio recorded to tape, Play is an innovative sampler module that can load pre-recorded audio files and capture external audio via its inbuilt recording capability. Atelier’s multichannel functionality ensures that multiple playheads can run simultaneously, targeting separate starting points of the waveform, and scrubbing back in different directions and pitches. Results range from classic tape-style effects, to pure sonic mayhem and everything in between.

Gen
Although related to a traditional oscillator, Gen (see image below) has some tricks up its sleeve that break from convention and extend its functionality.

Whilst Play deals with incoming audio signals, Gen is tasked with generating frequencies based on a selection of basic waveforms (Sine, Triangle, Rectangle, and Noise), which can be blended to create hybrid waveforms. Individual Phase Modulation sliders are routed to each waveform, thus resulting in a rich variety of complex timbres, which is especially effective when paired with Atelier’s modulation functionality (discussed later in the review). Due to Atelier’s multichannel capabilities, Gen is capable of creating lush chords and dissonant, atonal harmonic textures–all from one module.

Band
With up to sixteen different bands that can be individually positioned in the frequency spectrum and the stereo/surround panorama, Band (see image below) is an advanced filter bank that possesses far more creative potential than traditional Equalisers (EQs).

Functioning as an advanced spectral-shaping processor, this module comes alive when paired with Atelier’s advanced modulation system, allowing users to create complex filtering effects that enrich and animate the sound stage.

Pitch
Pitch (see image below) combines traditional Pitch Shifting with Granular Delay. The module’s ability to transpose and delay an incoming audio source with up to eight pitch shifters results in rich harmonic and granular timbres.

It is especially effective on monophonic sources, such as vocals and leads, though it’s worth exploring the effect on any input source. An optional ‘Freeze’ function is available for each pitch shifter, which holds the incoming audio buffer and is well suited to experimental sound-design. This is especially true when creating ambient drones and immersive soundscapes.

Time
Capable of processing up to 32 individual taps, Time (see image below) is an advanced Delay module that’s remarkably versatile in scope and scale. From simple tape-style delays, to looping, flanging, chorusing, vibrato, multichannel Haas effects, and dense, cloud-like reverbs,

Time is equipped to handle even the most demanding of temporal sound-design tasks. Adding to its complexity is the fact that each tap is equipped with an independent band pass filter that can be positioned anywhere in the frequency spectrum. Advanced users will no doubt have endless fun exploring the possibilities of this module.

Comb
As the foundation for many types of Physical Modelling, Comb Filtering is deeply rooted in the synthesis of organic instruments and textures, such as the creation of plucked strings, woodwinds, and percussion. Comb (see image below) is Atelier’s homage to this often overlooked approach to synthesis and processing.

Traditional Comb Filters rely on Resonance and Delay to produce their unmistakable timbre, and Comb leans into this approach by greatly expanding the number of simultaneous comb filters produced within the module. From simple Karplus-Strong synthesis, to strummed instruments and infinitely resonating tails, Comb pushes the limits of traditional Comb Filtering to new heights.

Gain
Gain (click to see image) is a deceptively simple module that primarily functions as a volume control to tame and manage the signal as it moves through the processing chain.
Unlike conventional gain controls, Gain possesses innovative ‘Muffle’ and ‘Distance’ parameters that accurately simulate the real-world effect of altering the source’s proximity to a microphone. Ultimately, these two sliders gently attenuate high frequencies, introduce slight audio delays, and subtly smear the audio source in a manner akin to reverberation. When combined with Atelier’s modulators, Gain can simulate surprisingly natural spaces that are warm and organic.

Viz
Viz (see image below) combines multichannel VU Metering with Spectrum Analysis, a Correlation Meter, and an Oscilloscope to offer unprecedented insight throughout the processing chain.

Although it doesn’t influence the sound, technically minded users will appreciate the value Viz brings in spotlighting potential problems throughout the signal chain.

Modulators

Situated in the Lower Panel, Atelier’s Modulators (see image below) bring animation and life to the previously discussed Processors.

Capable of modulating virtually any parameter throughout the ecosystem–including the Modulators’ parameters–these three modules push Atelier’s sound-design capabilities to unprecedented heights.

As with the Processors, there are certain functions that are common to each Modulator (see image below).

Firstly, Modulators can be assigned to parameters simply by clicking and dragging on the modulation handles. Represented by coloured dots (green boxes), these handles output virtual patch cables that can be freely dropped onto multiple parameters throughout Atelier. One drawback is that users are unable to manage individual assignments from the source modulator, which is only possible to do from the destination parameter.

True to Atelier’s forward-thinking approach, the Modulators are equipped with “Polyadic” functionality, which can be engaged via a simple button (red boxes). When triggered, the Modulator will output an independent modulation engine to each destination, therefore eliminating the need to load multiple instances of the same Modulator. Conversely, when disengaged, each destination receives an identical modulation engine, thus echoing the behaviour common to most plugins. This feature alone greatly expands the potential that each Modulator has to offer, allowing users to create complex, undulating modulations with relatively few Modulators.

Agitation
Agitation (see image below) is a continuous modulation source that fully embodies Atelier’s commitment to randomisation. Capable of seamlessly morphing between the regular, repeating modulation common to all Low Frequency Oscillators (LFOs), and extreme chaos, Agitation is a multipurpose module that injects predictable and organic animation into the processing chain.

Notably, Agitation’s rate of modulation (Freq) can be pushed into the audible frequency range, maxing out at 200Hz. This brings audio-rate Frequency Modulation (FM) into Atelier’s ecosystem, therefore adding to the incredible range of sound-design capability already on offer.

Peak
At its core, Peak (see image below) is an Envelope Generator that greatly expands on the traditional capabilities found in typical designs.

Looping and Probability functions add continuous modulation and randomisation respectively, whilst other features, such as Delay, Hold, Trigger, Slant, and Ease offer maximum control and customisation over the timing, behaviour, and shape of the module.

Control
Control (see image below) is essentially a unique interpretation of a common Macro control, which provides users with a way to directly interact with multiple Processors and Modulators simultaneously. This module works best when assigned to multiple parameters and mapped to a MIDI controller.

As with Atelier’s other modules, Control possesses a few interesting quirks that impact its behaviour, thus allowing for deeper control over gesture-based modulation. Features, such as Delay and Loop, affect the module’s behaviour when dragging on the modulation depth, introducing inconsistencies that make the resulting modulation unpredictable. The ability to alter the shape of the slider’s movement provides further customisation, once again demonstrating Atelier’s thoughtful implementation of randomisation, as well as the developer’s commitment to organic modulation.

In Use

Atelier comfortably excels as both an audio effect and as a sound generation source. This hybrid nature guarantees versatility for the user, and strongly elevates Atelier’s potential for becoming one’s default candidate for creative production tasks.

The Play module is one of Atelier’s standout features. Its ability to capture input audio for further processing and manipulation connects Atelier to GRM’s roots in Musique Concrete, allowing users to freely experiment with audio on the fly. Its capacity to mangle and repurpose existing audio is a creative goldmine that seamlessly combines with Atelier’s processing modules, ensuring that users can extract maximum value from their sampled or original material by transforming it in virtually limitless ways.

Atelier’s thoughtful implementation of randomisation and morphing takes users on a journey of true, sonic discovery, capturing the spirit of experimentation in a manner that is genuinely fresh and exciting. Few tools capture this spirit as dextrously as Atelier, and fewer still, present their users with such an immersive and accessible canvas to execute their ideas.

The interface is a joy to navigate, with thoughtful elements that make it easy to make and manage modulations, randomise individual and collective parameters, and capture moments of inspiration on the fly. Additionally, GRM Tools’ decision to embrace the digital domain and maximise its utility is a nice departure from other modular platforms that seek to emulate analog systems. Whilst there is undeniably room for both approaches, GRM Tools deserve plaudits for their digital-first approach, which has led to a user experience that is both practical and aesthetically pleasing. Ultimately, Atelier is a rare platform that simplifies the infinitely complex terrain of advanced sound design, making it approachable for users of all experience levels.

Conclusion

With the release of Atelier, GRM Tools has created an ecosystem that will appeal to the imaginations of explorative sound designers and experimental musicians. The platform invites and encourages inquisitive minds to roam without restriction, challenging users to push the boundaries and capabilities of each module. Atelier’s commitment to randomisation pushes this concept further, acting as a sonic laboratory that enables users to generate and capture moments of spontaneous and accidental creativity that can augment compositions and productions across multiple disciplines.

Whether working as a beat maker, film and game composer, or as a dedicated sound designer, Atelier is equipped to enhance and augment creative workflows with consummate ease. Given that the software displays this much innovation and prowess in its nascent stages, it’s incredibly exciting to see how GRM Tools is poised to develop Atelier in future evolutions. With the promise of additional features and modules already in the pipeline, Atelier looks set to thrive as it builds on its ambitious release.

Technical Info

1. Straightforward download, installation, and authentication process. A User Account is required for licensing purposes. No iLok account is necessary.
2. Intel, Apple Silicon, and Windows are supported: Standalone, VST3, AU, and AAX.
3. The manual is available online via a series of helpful articles.
4. The CPU usage is largely dependent on the size of the processing chain, but the software is well-optimised and expertly crafted.

Disclaimer: This review was conducted on a MacBook Pro M4 Pro with 48 GB RAM and 1 TB SSD (macOS Sequoia 15.7.4). User experience with the reviewed software may vary with different technical specifications.

Alternatives

Although ecosystems such as Bitwig’s Grid, Native Instruments’ Reaktor, Cherry Audio’s Voltage Modular, VCV Rack, and Softube’s Modular offer similar processing capabilities, Atelier differs in its design and implementation. The aforementioned are excellent alternatives to explore, as are those listed below.

1. Max (Cycling ‘74)
2. Phase Plant and Multipass (Kilohearts)
3. Hyperion (Tracktion)

Thanks, Josh! If you’re interested in giving Atelier a go you can download a free demo version, or purchase the software at the GRM Tools store for €249 EUR (incl. tax).

Josh Turvey is a musician, producer and an avid plugin enthusiast. He provides online, 1-2-1 tuition for guitar and music production for NoiseQuest.