Lluís Callejo i Creus

Visual Score for Callejo's piece Structures 6502

Lluís Callejo i Creus (Vilafranca del Penedès, 1930 - Barcelona, 1987) was a Spanish composer of electroacoustic music.

He completed industrial engineering studies in Barcelona, ​​specializing in electronics. He was self-taught in the field of musical composition, and between 1948 and 1955 his musical activity mainly focused in the direction of choral formations, while dedicating himself to his professional activity, participating in projects like the installation of the Vandellòs nuclear power plant, Tarragona.

Side view of the Stokos IV, at the Museum of Music of Barcelona

Detail of the internal plates, in the Museum of Music of Barcelona

Front view of the Stokos IV, at the Museum of Music of Barcelona

In 1968 he attended a concert of electroacoustic music with Josep Maria Mestres Quadreny and resumed his interest in music, deciding to apply his knowledge of electronic engineering to the field of electronic sound production. Mestres Quadreny became his teacher in the field of contemporary music and more specifically in electroacoustics. Along with Andrés Lewin-Richter they founded, in 1974, the Phonos Laboratory of Electroacoustic Music, where Callejo designed and built various instruments for sound synthesis (the first of which was a random sound synthesizer called Stokos 4) and composed several works for magnetic tape and musical instruments.

He was subsequently named professor of Information Theory and System Dynamics at the Autonomous University of Barcelona (UAB), and at the Polytechnic University of Catalonia (UPC) and since 1979 he has been devoted to the Phonos Foundation for Research in Digital Sound Generation and Computer-assisted Composition.

In 1974 he participated in the International Contemporary Music Course of Darmstadt (Germany) and in 1982 and 1984 at the international conferences of Music and Computing in Venice and Paris. From 1976 to 1986, he presented his works at numerous music festivals.

Stokos IV

Among other things, Callejo designed filters, mixers, stochastic sound generators , such as Stokos IV. He achieved sound generation by computer using an AIM 65 microprocessor from Rocwell (1980), with programs developed by Vicente Larios and Conrdado Dubé, as a final thesis under Callejo's supervision.

Works

• Sonorous space (1976), for oboe and clarinet (4 ')
• Triptych (1977), for flute, clarinet and magnetic tape (10 ')
• Textiles (1984), for clarinet and magnetic tape (4 ')
• Drawings (1981), for percussion and magnetic tape (8 ')
• Structures 6502 (1982) Created with the Rockwell Aim 6502 and Sintetizadores RSFU, for magnetic tape (7'29)
• Landscapes (1983) (11'87)
• Trio (1984), for flute, oboe and clarinet (3 ')
• A Pitàgores (1985) (in Do) (5'07)

Text adapted from the Catalan wikipedia.