Born in Silesia in 1951, he graduated with honours in composition under Józef Świder from the State Higher School of Music in Katowice. In 1984 and 1988 he attended International Summer Courses for New Music in Darmstadt.
In the 1970s he made himself known as a pianist-improviser (being awarded a prize at the Fourth Piano Improvisation Competition in Gdańsk, 1972) but eventually devoted himself to composition and conducting. His honours include the Beethoven Prize of the City of Bonn in 1980 (for Symphony No. 2 'Concertante'). His Symphony No. 1 was placed first at the International Composers' Rostrum in Paris in 1980, and the String Quartet No. 2 and Concerto festivo were recommended at the same contest in 1988 and 1997 respectively. In 1985 he received the 'Silesian Polyhymnia Prize' for the Chamber Music cycle and Three Songs to words by Kazimiera Iłłakowicz, and a year later the Stanisław Wyspiański Young Artists' Prize (First Degree) for his achievements. His honours also include awards of the Silesian cities of Mikołów (1999), Bytom (2000) and Tarnowskie Góry (2001). From 1987-1989 Aleksander Lasoń was a recipient of Witold Lutosławski's grant.
Currently he lectures at the Karol Szymanowski Academy of Music in Katowice and at the Cieszyn Branch of the Silesian University (with a title of professor from 2000).
From 1996 he is a conductor of the New Music Orchestra, founded at the Music Academy in Katowice on his initiative.

Selected works (since 1980): Mountains for symphony orchestra (1979-80), String Quartet No. 1 (1980), Wind Quintet 'Spring' (1980), Chamber music No. 5 'The Four Seasons' for clarinet, trombone, piano and strings (1981-84), Three Songs to words by K. Iłłakowicz for alto, oboe, violin, cello and piano (1983), Sonata for Solo Violin No. 2 (1984), Concerto 'Pablo Casals in memoriam', for cello and orchestra (1985), Concertino in two Movements for violin and piano (1986), String Quartet No. 2 (1987), Cathedral for symphony orchestra (1987-89), Chamber Music No. 3, second version (1990-91), String Quartet No. 3 (1992-93), Concerto festivo for violin and orchestra (1993-95), Relief for Andrzej for string quartet (1995), '2 plus 2' for Witold for violin, cello and two pianos (1997), Symphony No. 3 '1999' for choir and orchestra (1996-97), Credo for symphony orchestra (1997), Musica Sacra - Sanctus for four male voices, organ and string orchestra (1998), 20 for 4 for string quartet (1998), Concerto 'Harmonium' for accordion and orchestra (1995-2000), Fanfares '50' for wind ensemble and percussion (1999-2000), Chamber music No. 6 'Saxophonium' for string quartet and percussion (2000), String Quartet No. 4 'Tarnogórski', (2000), A Little Book for Clarinet and Strings (2000-2001), Canto - 'Dharma' for cello and strings (2001; version for cello and piano - 2002), Suibusium felix for two violins and string orchestra (2002).

The piece Chamber Music No. 5 'The Four Seasons' was written in 1981, on the initiative of Zygmunt Krauze, with a view of a first performance in Paris in January 1982. The plan did not materialize due to the imposition of martial law in Poland in December 1981. In 1981-84 I introduced minor alterations to the piece. It was premiered in its new shape after quite a while, on 1 April 1989, by the 'Encores Chamber Orchestra' under Wojciech Michniewski at the 'Poznań Spring' Festival. The work's individual sections (Spring, Summer, Autumn, Winter) are in stark contrast to each other. They were written in the corresponding seasons of the year and are a reflection of my emotional and spiritual state rather than a musical illustration. The musical material was subjected here and there to a fairly strict treatment. By and large no rigours were applied in relation to metre or rhythm. This gives the performers a sense of freedom, which in effect should produce an expected consistency.
The piece is dedicated to Krzysztof Droba.
Aleksander Lasoń