Jacob Cats was born in 1922 and studied music with Ernest Mulder. Among the works which he has realised at the Utrecht studio since 1967, the most notable is perhaps the tiptych "Lux", "Prediction I" and "Prediction II". The last of the 3 pieces also calls for a capella chorus and a soloist.

LUX (1968) is symmetrical composition. The first section, recapitulated at the end of the work, makes use of drawn-out sounds, to which filtering and reverberation give a soft, blurred colouring. The middle section, by contrast, is rhythmic and lively.

Alireza Mashayeki was born in Tehran in 1940. After studying music in his own country and in Viennam he went on to study electronic music in Cologne and then at the Utrecht studio, where he composed, among other works, "Autonom III" (1967).

SHUR (1968) combines electronic sounds with motives from Persion folk-music played on the cello. In their relationship to these motives, the various electronic sounds act sometimes as a contrasting elecment, sometimes as an estension, On the one hand short impulses constrast with the continuous nature of Persian music; on the other, the melodic oscillations which characterise the music are underlined and prolonged by a kind of electronic aureole.

Luctor Ponse was born in Geneva, and studied music there and in Valenciennes. He has won awards at several international composition contests, notably the Queen Elizabeth of Belgium contest, at which his Symphony (1953) and later his Violin Concerto (1965) won distinction. Since 1964, Luctor Ponse has been a regular collaborator in the activities of the Utrecht studio where he has realised among other works, a Concerto for piano and electronic sounds and the series of "Radiophonies".

RADIOPHONIE 1a (1968) is a rhythmic work based on the play of regular and irregular pulsations, which at times develop in continuous trajectories. The overall direction of the work is determined at one and the same time by acceleration, broadening of the tessiture, and dynamic expansion.

Jos Kunst was born in 1936 studied composition with Joep Straesser and Ton de Leeuw and elcetronic music at the Utrecht studio. The Music Weeks of the Gaudeamus Foundation have brought him several prizes and also the first public performance of 'Expulson' in September 1969.

EXPULSION is a series of seven variations, some of which join without transition while others overlap. The work often explores the intermediary sound fringe between the discontinuous and the continuous. This fringe appears when the acceleration of a series of beats changes them from the punctuated state to that of a compact mass.

Gottfried Michael Koenig was born in Magdeburg in 1926. He studied composition in Brunswick and Cologne and information theory at the University of Bonn. From 1954 to 1964 he was a permanent member of the electrnic studio in Cologne, where he composed 'Klangfiguren'. In 1964 Koenig took over the artistic direction of the Utrecht studio, where he does important work both as a composer and as a professor.

FUNKTION BLAU is one of a series of colour studies called 'Functions' each of which sets out a variant of one experimental principle. This principle brings in a computer to determine variations of from and colour according to statistical laws. In this line of research, the 'Functions' are methodical experiments rather than compositions in the strictly aesthetic sense of the word.