Aleksander Kolkowski (born 1959 in London) is a British musician and composer whose work combines instruments and machines from the pioneering era of sound recording and reproduction (Stroh violins, wind-up Gramophones, shellac discs and wax-phonograph cylinders) to make live mechanical-acoustic music. He lives and works in London, England.

Kolkowski studied music at the University of London, Goldsmiths College, violin with Clarence Myerscough at the Royal Academy of Music. Taught by John Tilbury, Hugh Davies and in 1982 participated in seminars and performances directed by John Cage. In the late 1970s, Kolkowski played on the then burgeoning punk rock scene in London, featuring on the records of Henry Badowski, an early member of The Damned, a British multi-instrumentalist, songwriter, and composer, who was a member of several punk rock bands in the 1970s. Kolkowski played violins on Badowski's post punk album, Life Is a Grand..., alongside sometime Generation X (band) guitarist, James Stevenson (musician) and Dave Berk, drummer with Johnny Moped, an early Stiff Records punk rock band from the late 70s' first wave of punk in England.

Over the past 25 years he has worked internationally as an improvising violinist, interpreter, solo performer and composer for dance, theatre and film (Sasha Waltz, Performance artist Rose English, Corinna Harfouch and Butoh dancer Anzu Furukawa amongst others). He created several mixed-media projects in the UK and in Germany together with artists, film-makers and choreographers. From 1996 to 2003 he was resident in Berlin.

His latest work combines instruments and machines from the pioneering era of sound recording and reproduction (Stroh instruments, wind-up Gramophones, shellac discs and wax-cylinder Phonographs) to make live mechanical-acoustic music. Since 1999, he has actively explored the potential of pre-electronic sound reproduction technology in live performance. This work has been shown in Germany, Holland, Poland, Italy, Austria and the US, and featured on WDR and Deutschlandradio radio stations.

In 2002 he founded Recording Angels, a series that examines our relationships to recorded sound using antiquated home-recording devices such as Phonographs and acetate record cutters in performances and installations. Projects include "Voices and Etchings" for 6 singers and Gramophones (Staatsbankberlin, 2003) and "Mechanical Landscape with Bird" (MaerzMusik, Berlin 2004), featuring live singing canaries, wax cylinder Phonograph recordings and a rotating horned string quartet. Collaborations with artists include: Martin Riches, Apartment House, Kairos Quartett, Ute Wassermann, Anna Clementi, Aki Takase, Tony Buck, Hayley Newman, Phil Minton, Tristan Honsinger, Tony Oxley, Evan Parker, Sainkho Namchylak, Louis Moholo, Jon Rose, Matt Wand, Richard Barrett, Phill Niblock, Christian Wolff, Claus van Bebber, Boris Hegenbart, and many, many others.

Since 2013 Kolkowski is a collaborator in The X-Ray Audio Project by The Real Tuesday Weld frontman Stephen Coates. In 2015 Kolkowski was selected for a residency with the British Library Sound Archive.