Perripplayear is a musical immersive comprovisation for N remotely comprovising musicians and any instrumentation in a virtual 3D world. Its meant initially for being presented during the Network Music Festival in July 2020. Its is performed by the Kaon'CPTs.


A musical immersive comprovisation for any number of remotely comprovising musicians and any instrumentation.

This comprovisation explores musical texture through balancing networked delays and network enabled feedback. It reposes on the awarness that networked musicians can experiment together when geographically distant and connected through network. Their sense of "togetherness" (in musical and extra-musical terms) will depend, among other things (and possibly principally) on the software they use to play together. This piece explores a social experience of remotely partaking in music making, simultaneous use of different types of software, more or less adapted to music, in order to deliver an audio-visual performance, with virtual choreography, public participation and feedback.

The immersive performance takes place inside a virtual world hosted in a Mozilla Hubs scene. The audience joins into the Hubs world (via smartphones, tablets, computers, even VR headsets). The musicians are also present in the Hubs world (as avatars).

The piece will unfold on three different levels:

The musicians, each in a different geographical location, connected to the network, play together using a software made for that purpose, offering reasonably low latencies (i.e. ninjam, jack-trip, jamulus or similar). They all follow a score that is designed to allow for improvisation and sonic experimentation. It also offers each musician moments of silence and instructions to perform certain actions in the global choreography (i.e. change his/her avatar position, start/stop stream, activate/deactivate some software or device). Their synchronized audio is mixed down and offered as a stream to along with a synchronized video feed of the score (or some other pertinent and appropriate visualization). The musical base will focus on texture, alternating between cued events (surrounded by silence), rhythmic passages and ad lib. ripples, sections of indefinite duration of diverse layers of textures.

The aforementioned feed is instantiated inside a Mozilla Hubs virtual world and becomes the main source of audio-visual content for the audience. After some time, the musicians activate their own cameras and direct audio signals. They continue performing the scored piece but now the audio signals are completely desynchronised with the twitch TV as well as between themselves. During the performance, each musician will move his/her avatar to a different place in the scene, thus offering a shifting "spatialization" for the audience (because sound sources are spatialized in stereo or binaural manner in Hubs). After some more time, the participating musicians (and perhaps some "friendly" audience members) will capt the mixed audio of the entire scene and re-transmit it as other twitch feeds back into the Hubs. The audience will be invited to open their microphones as well in order to contribute their audio to the entire audioscape.

Duration :: 15 min.

Program note

Perripplayear is a musical immersive comprovisation for N remotely comprovising musicians and any instrumentation in a virtual 3D world.

All this comes from distance, symbiosis, lack, virtual choreography, simultaneous instants, drifting clocks & musical texture. Social tropism leads them to perform where the light can shine in the forest of live togetherness software. Unfolded into three different time layers, the audience is invited inside a virtual world, being copresent as avatars with the Kaon'CPT & friends. At the border of the software forest, your browser is here, regardless the shape of your vehicle be it a smartphone, a tablet, a computer or VR headset.

Comprovisators are facing the challenge of travelling along several time layers, the first one is built through a reasonably low latency streaming software offering tempo synchronization, enabling mutual listening while the following a score that includes improvisation, sonic experimentation, avatar choreography. The second layer is the result of a careful audiovisual realization feeds of live content streamed to several live diffusion platforms (, Finally, the virtual world itself is the place where your behaviour will contribute to the scape with the Kaon'CPT, chat with others, see realized feeds and experience the shifting spatializations offered by navigation from the location to location.

Duration :: 15 min.

Creators bios

The Kaon'CPTs is an ephemeral band dedicated to flip along several time realities. Undecided, their action oscillates, alternates from physical to virtual, hesitates between now, before and later. Previous activities include synchronized network music, implementing timecode-based behaviours and listening to buffer underflows in interactive cyberworlds. Actually, nothing periodically unusual can affect Kaon'CPT's conservation of entropy.

The core members, mostly research crew members of [SAT]Metalab, have been operating music together at previous occasions, including collaborations with scientists (The Melatab, at Network Music Festival in 2013) and unmanaged kids (Gaping Fools, since 2007 in garages, caves and living-rooms). Despite some fruitful solo carers, the Kaon'CPTs are inviting friends. The energy is bounded from below.

Kaon'CPT members, (GMT-4) are Michal Seta (concept/charge conjugation), Nicolas Bouillot (concept/time reversal), Bennett Smith (dispersion), Emmanuel Durand (graphical memory), Nina Ripoll (action) and Zack Settel (entropy). Other friends have been determined in a near future, including Stuart McLeod (GMT-7), Hiroya Miura (GMT+9), D. Andrew Stewart (GMT-7), Dirk Stromberg (GMT+8) and Michael Edwards (GMT+1).