Deleuze on life & sound

The important thing is to understand life, each living individuality, not as a form, or a development of form, but as a complex relation between differential velocities, between deceleration and acceleration of particles. A composition of speeds and slowness on a plane of immanence. In the same way, a musical form will depend on a complex relation between speeds and slowness of sound particles. It is not just a matter of music but of how to live: it is by speed and slowness that one slips in among things, that one connects with something else. One never commences; one never has a tabula rasa; one slips in, enters in the middle; one takes up or lays down rhythms.

— Gilles Deleuze, Spinoza: Practical Philosophy