In addition to the initial introductory vibration formula taken directly from Daphnis et Chloe, 'Vortex' suggested to me harmonic writings focused around the four tones of the diminished seventh chord, a rotational chord par excellence. Treating each of these tones as leading ones, we obtain the possibility of multiple modulations. Of course, we aren't dealing here with the tonal system but rather with considerations of what might still be relevant and innovative in this system. The chord about which I'm speaking is thus a common part of the three previously written spectra and determines other displacements.
The piano used in the work is tuned a quarter tone lower, which changes the sound of the instrument, at the same time facilitating the integration within microintervals, which are essential in this work. In Vortex Temporum the three archetypes described above revolve around one fragment and the other in temporary intervals, differing among themselves as among people (the tempo of speech and breathing), whales (spectral time of sleeping rhythms), and birds or insects (extremely contracted time, whose contours become obliterated). Thanks to this imagined microscope, the notes become sound, a chord becomes a spectral complex, and rhythm transforms into a wave of unexpected duration.
The three portions of the first part, dedicated to Gérard Zinsstag, develop three aspects of the original wave, well known to acoustic engineers: the sinusoidal wave (vibration formula); the square wave (dotted rhythm) and the jagged wave (piano solo). They develop the tempo, which can be defined as 'joyful', the tempo of articulation, rhythm of human breathing. The isolated piano section reaches the boundaries of virtuosity.
The second part, dedicated to Salvatore Sciarrino, approaches the same material in expanded time. Initial Gestalt appears here only once, spreading throughout the entire part. I tried here to create the feeling of the confused speed inside the slow tempo.
Part three, dedicated to Helmut Lachenmann, introduces a long process allowing the creation of interpolation, which appears between the various sequences. Continuity gradually establishes, and expands, finally becoming a kind of widely conceived projection of the events from the first part. The spectra originally developed in the harmonic discourse of part two expand here to an extent degree, enabling the listener to detect the structure and entrance into other time dimension.
Short interludes are planned between the parts of Vortex Temporum. A few breaths, noises and discrete noises colour the awkward silence, and even the discomfort of the musicians and listeners, who hear their own breathing between he parts. Treating waiting time this way, linking the time of the audience with the time of the work, refers to some of my earlier works, for example Dérives, Partiels or Jour, Contrejour. Here, of course, these tiny noises are allied with the morphology of Vortex Temporum.
Overthrowing the material in favor of pure endurance is a dream, which I have been carrying out for many years. Vortex Temporum is perhaps only a history of the arpeggio in time and space - from the point of view of our ears.
Vortex Temporum was commissioned by the French Ministry of Culture, Ministerium für Kunst Baden-Würtemberg and the Westdeutsche Rundfunk Köln, at the special request of 'Ensemble Recherche'.