Sonance III: Robbie Doorman, Aimée Theriot and Jilles van Kleef

Sound is a mechanical vibration that propagates through matter in the form of gases, liquids, and solids. Although the characteristics of sound depend on the type of wave (whether longitudinal or transverse) and the physical properties of the medium, the fundamental principle remains the same: sound requires a material substance to transmit energy from one point to another.

Nowadays, when we think of sound, we immediately think of advanced PA systems, high-fidelity speakers, and the relentless pursuit of better audio technology. During Conflux 2025, however, Robbie Doorman showed us through his installation series Sonance that you don’t need fancy speakers when you can create your own. With Sonance III, he amplified the unique sounds of performers Aimée Theriot and Jilles van Kleef through the industrial roughness of Katoenhuis.

Moving away from conventional loudspeakers and optimal sound references, Sonance III invited the audience to experience Doorman’s self-crafted sculptures as a sonic composition. Three relic-like steel sculptures were placed in one of the upstairs rooms of the Katoenhuis, accompanied by two smaller works on either side and four more hanging from the pillars, almost hidden within the architecture of the space.

The minimal installation, created by Robbie Doorman, a sculptor and sound artist whose work explores the intersection of music and ritual in society, took the form of an instrument in its own right, propagating sound through its materiality and shape. His body of work investigates both the heritage and the future of musical traditions through sound, focusing on the entire music-making process, from the craftsmanship of instrument making to the experience of listening. Materiality plays an integral role in his practice. Sonance III, exhibited and performed during Conflux, is part of an ongoing installation series titled Sonance.

During the opening evening, Aimée Theriot performed Chorale v.1, rooted in the tradition of vocal choral music and built around the natural harmonic frequencies of the metal sculptures. Aimée Theriot is a musician, sound artist, and organizer based in Amsterdam. Her music draws from free improvisation, ambient music, ASMR, and soundscape recordings, with a strong emphasis on experimentation using live electronics, field recordings, e-cello, and voice. 

On the final day of the festival, Jilles van Kleef, an Amsterdam-based musician and artist, performed their composition See If See If See Thee, featuring electric guitar and electronics. 

Several months later, we asked Robbie Doorman, Aimée Theriot, and Jilles van Kleef to reflect on their commissioned work for Conflux Festival 2025.

You created a commissioned work for the Conflux Festival. Could you walk us through the project you developed for the previous edition? 

Robbie Doorman: “After the first conversation with Eelco and Joris, I felt like a lot was possible. With the collaboration and platform they were offering, I decided that this was a great opportunity to revisit ideas and sketches I had from previous exhibitions, for which I never had the chance to fully develop. I see Sonance III as part of a continuing project that changes with every exhibition I do. 

The idea that’s at the core of this is to make loudspeakers as if they were sculptures, which creates a form of artistic expression in the technical structure behind (music) listening experiences. As forming the loudspeakers is also a sculptural practice, it makes a sort of axis where form follows sound or sound follows form.”

Specifically, what techniques, theories, or influences have shaped this work or your broader practice? 

Robbie Doorman: “I draw a lot of inspiration from listening experiences and the way we shape listening spaces, such as churches, clubs, or concert halls. It gave me the idea to approach sound in an almost architectural way, where a loudspeaker could become a special intervention, which also relates closely to sound system culture. 

One of the ideas I had for a while was to ask other composers to create music for the installation. Through the festival, I was connected with Aimée Theriot, and through my own circles I asked Jilles van Kleef. Slightly surprisingly, these collaborations became very inspiring, especially seeing both of them get to know the different sound and being challenged to rethink their way of making music, resulting in two completely different yet equally brilliant compositions. It also placed me in a very different position than before.”

Aimée Theriot: “Chorale v.1 grew directly out of the acoustic properties of the metal sculptures in the installation. Rather than imposing a musical structure onto the space, I worked with the natural harmonic frequencies of the sculptures themselves, letting their resonant character shape the composition from the inside out.” 

Jilles van Kleef: “My ideas started quite broadly, as I initially wanted to involve (modular) synthesizers, voices, and drums. But the more I experimented with the single resonator sound sculpture Robbie lent me, the more I realised I wanted to create something more minimal and singular. I ended up mainly using an electric guitar and sounds recorded from the metal sculpture using contact microphones.”

What were your primary inspirations for this project? Do you follow specific artists, scientists, or theorists to ground your research? 

Robbie Doorman: “I had more of a main motivation than a main inspiration, which was to build some speakers that I had been wanting to make for a long time. However, after visiting the space I could use in Het Katoenhuis, I became very inspired by the space itself: its size and the infinite echo it produces. These are very interesting properties to work with. Usually, I find the space I exhibit in just as important as the work I’m making.” 

Aimée Theriot: “Sound sustains and decays through cyclic, harmonic structures that nod to the trance-inducing qualities of ritual music across cultures: Islamic nasheeds, Christian hymns, protest chants, and healing ceremonies. These traditions share an understanding that music can do something beyond entertainment, anchoring collective experience, inducing altered states, and serving as a form of grounding. 

My broader practice merges acoustic research and composition, and this work was shaped by thinking about how resonance, decay, and repetition function both acoustically and culturally. The final moments of the piece include a sample recorded at a pro-Palestine demonstration at Amsterdam Centraal Station: hundreds of people producing collective sound as a form of appeal, resistance, and ritual in the most contemporary sense.” 

Jilles van Kleef: “I specifically used an aluminium-neck guitar to achieve as much sustain and as many overtones as possible. It also felt fitting to use an instrument made mostly of metal and wood within an installation consisting of huge wooden plates inside wooden frames. I experimented with alternative guitar tunings until I settled on one that matched the voicing and mood I had in mind. It is tuned quite a bit lower than a standard guitar and contains some repeating notes, which gives it a droning quality. 

I really tried to write something that would emphasise what I found most interesting about the sound sculptures. There is a specific volume at which the plates almost overload, making them sound like gongs or cymbals being struck with mallets. I tried to write and perform a piece that constantly moves towards this point and away from it.”

The theme for Conflux 2025 was Rites of Decay. How did you interpret this theme in relation to your work? 

Robbie Doorman: “Often, people find my sculptures mystical and relic-like. They have something of the monolith effect from the film 2001: A Space Odyssey, as if they are artifacts from an unknown civilization. This also relates to my idea of challenging the way we listen to sound, where the loudspeaker as we know it today has become both a blessing and a curse. In its purpose of creating an optimal sound reference, it eliminates a certain form of creative freedom in both making and listening to sound.” 

Aimée Theriot: “The theme Rites of Decay felt like a fitting description of what the piece tries to do. Decay, in acoustic terms, is the gradual loss of sound energy after a source stops, the reverb tail, the echo fading into silence. Decay is also what happens to structures, certainties, and lives under conditions of violence and abandonment. The protest sample at the end tried to make that connection explicit. The piece moves from the intimate acoustic decay of metal vibrating in a room to a much larger and more urgent form of collective sound-making.” 

Jilles van Kleef: “The piece thematically moves from hopeful to overwhelmed and overloaded, to euphoric and dreamy, to contemplative and moody, and finally toward something dark, threatening, and full of impending doom. The ending quite literally sounds like incoming drones, bombers, or bombs. After almost two years of witnessing horrific footage of the genocide in Gaza, this was something that was very present in my mind.”

From an audience perspective, what kind of experience were you aiming to create? Did the audience’s reception match your initial expectations? 

Robbie Doorman: “It’s a listening experience, so the audience is a key factor in it. The word “audience” alone already says enough. A large part of the experience is also shaped by the two composers who were invited to create the music for the exhibition. However, I try not to think too much about the audience’s experience. I mainly try to keep the space open and invite people to walk around and discover different sounds. Since the sound is very spacious, I like people to move through the space as if they are visiting a cathedral in a foreign city for the first time.”

This work has now extended beyond the festival, as you plan to release recordings of the live performances digitally. Could you tell us more about this upcoming release? Additionally, do you have any further plans for Sonance III? 

Robbie Doorman: “Together with the musicians, we made an effort to document this exhibition because it was, for all of us, quite a special performance. The release is important to us as a form of documentation, but I also think it is an interesting piece of music to share with the world, even if it is only for the audience present at the exhibition to revisit the experience. 

In addition, Jilles van Kleef managed to edit a video of his entire live performance, which captures the sound, the installation, and the overall atmosphere better than I have ever seen before. 

As I said before, Sonance is an ongoing project for me. Every exhibition gives me new ideas and also inspires other artists or organisers to come up with proposals. I would really like to keep inviting new artists to create music for my sculptures, but I’m also curious about what other artists can make when they get to know the Sonance installations better, or even get involved in the process of making the loudspeakers.” 

 

Check out the digital release of Sonance III via the following link:
https://robbiedoorman.bandcamp.com/album/sonance-iii 

Check out Jilles van Kleef’s edit of his live performance on Sunday afternoon:
https://www.youtube.com/watch?v=VB3j0nJjwOA

If you are interested in learning more about Robbie Doorman’s body of work, you can visit his website: https://robbiedoorman.com/ 

For Aimée Theriot, you can find her work here:
https://aimeetheriot.net

and finally, Jilles van Kleef:
https://www.instagram.com/ok_hole/

Interview by Mara Noto.
Photos by Pieter Kers I Beeld.nu.

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