The setup and the execution of the electroacoustic part of this work requires a Computer Music Designer (Max expert).

Performance date: Jan. 20, 2021 - First performance

Documentation date: Jan. 22, 2021

Version state


Validation date: Nov. 5, 2021

Executions dates of this version

  • Jan. 20, 2021, Studio de la Philharmonie

Version documentalist

  • lemouton (
  • jean_millot (

Version realisation

  • Sébastien Naves (Computer Music Designer)
  • Adrien LaMarca (Performer)


Tape part played by Christophe Desjardins.

No other version available

Detailed staff

  • viola
(Detailed staff comes from Brahms, send mail to for correction.)

Channel details

  • Number of output channel: 7

Electronic equipment list

Computer Music Equipment

  • 1 MacBook Pro - Apple Laptops (Apple)
  • 1 Max 8 - Max (Cycling74)
  • 1 Footswitch / Sustain Pedal - Footswitch / Sustain Pedal

Audio Equipment

  • 6 Loudspeaker - Loudspeakers
  • 1 ear-monitor - Headphones


  • Jan. 23, 2021, France, Paris, Philharmonie


  • Universal Edition


  • Sébastien Naves

Work length

  • 8 mn about
Download all files
File Author(s) Comment
Download [31.6 MB] Score score Pierre Boulez Universal Edition
Download [783.1 MB] Patch patch and sounds Sebastien Naves


Messagesquisse is originally written for 7 cellos.

Christophe Desjardins has realized a version where the solo viola played along with a prerecorded tape.
Synchronization with the tape is realised using a clicktrack that the musician should follow.

Loudspeaker setup

The six first tracks of the audio file are sent to loudspeakers located at the postition of the virtual musicians.
Track number 7 is the clicktrack to be sent to the musician ear monitor only.
Stage plan

Midi Setup

The tape can be triggered by the soloist using a footswitch pedal on stage or by the sound enginer at the mixing desk using the computer keyboard.

Software manual

The standalone application (built with Max) can be used by the instrumentalist to practice the piece at home, before the rehearsals in the concert hall.



In concert mode there is only two cues to trigger :

  • to start the piece
  • to start the tape after the cadenza (number 10 of the score)

Keyboard shortcuts

  • space bar start the sound
  • s to stop the sound

Rehearsal mode

In rehearsal situation, you can start the tape at each score section of the piece using the patch menu. Unlike in the “concert” mode, In “rehearsal” mode, each section should be triggered individually

Initialization routine checklist

  • Start
  • Audio ON
  • Performance Mode
  • Stereo Mode Off

Concert recording

exerpt accessible at

Version documentation creation date: Jan. 22, 2021, 2:52 p.m., update date: Nov. 5, 2021, 9:10 a.m.