C0 note (16,35 Hz) — vibrating on liquid surface

D0 note (18.35 Hz) — vibrating on liquid surface

C0 note (16,35 Hz) — vibrating on liquid surface

F0 note (21.83 Hz) — vibrating on liquid surface

G0 note (24.50 Hz) — vibrating on liquid surface

A0 note (27.50 Hz) — vibrating on liquid surface

Baroni, Claudio F: Perpetuo Motum 



Basic information

  • Title: 
    Perpetuo Motum
  • Subtitle: 
    for string quartet
  • Duration (in minutes): 
  • Year of composition: 
  • First performance (year): 
  • First performance (venue): 
    Orgelpark, Amsterdam
  • First performance (performers): 
    Quartetto Prometeo
  • Keywords: 
  • Conductor: 


  • Program notes: 

    Since 2007 I have been investigating how can I create a soundscape with my music. What is unique for the string quartet “Perpetuo Motum” and became its main idea, was the creation of a soundscape in a meditative perceptual states that should be in permanent movement, generating by itself its own sense of time.
    For this purpose I used a canon -micro and macro form- and two simple and distinct techniques on the strings:
    The first demands that the musician will always play double stops, one with open string and the other glissando (on the next string). By following the natural disposition of the string, the musician is rising up and down the entirely range of the instruments (e.g. IV and III; III and II; II and I; I and II; II and III and so fort).
    The second technique is a constant movement up and down from sul tasto to sul ponticello throughout the all piece, which is played like circular movement of the bow on the strings. I name this playing technique horizontal and vertical action.
    The music obtained created a constant glimmer shifting in the perceptual sense of harmony-hearing: waves that moved around and around in a microscopically polyphony.
    The quartet was written and premiered by the Quartetto Prometeo.



Total number of musicians: 
Musicians1st player2nd player



Content posted to the ISCM website reflects the viewpoint of individual submitters; its appearance herein does not imply official endorsement by the ISCM, its Executive Committee, or the Delegates to its General Assembly.