Sound Quartet is expanding the field of chamber music with electroacoustic research, composition and performance. The main ensemble 2017/2018 is Hara Alonso (SE/ES), Thomas Bjelkeborn(SE) and Paul Pignon (SE). Sound Quartet is also involved in music projects with Nadia Ratsimandrecy (FR), Emma Lloyd (UK) and Emilie Girard-Charest (C). Thomas Bjelkeborn is involved in research and artistic work to further develop the music of Sound Quartet at Sound and Physical Interaction research group Alto University Helsinki with Dr Koray Tahiroglu (Fi). Philippe Moenne-Loccoz (FR) is one of the founders of Sound Quartet and is often part of activities in France and Sweden as musician and curator.
Hara Alonso is a pianist and composer now resident in Stockholm. Coming from a classical background she is currently working in the integration of new technologies in music though composition, performance and multimedia. She is active as soloist and as member of different ensembles all around Europe.
Thomas Bjelkeborn is a sound artist, electronic musician and electroacoustic composer living in Sweden. He is also a curator at Fylkingen Stockholm and for the PUSH festival Gävle. He has performed compositions at electroacoustic and soundart festivals on all continents since 1988.
Paul Pignon has been playing and composing music of almost every kind for nearly 60 years, he has a physics degree and is a pioneer in EAM. His first foray into non-idiomatic improvisation was in Oxford 1962. He has lived about equally in the UK, Yugoslavia and Sweden.

Current live productions:
• Sound Quartet is the resident ensemble for Fridays PUSH concert series at Fylkingen Stockholm. Core ensemble is Thomas Bjelkeborn (SE), Paul Pignon (SE) and Hara Alonso (SE/ES). Regularly with extensions of both musicians and visual artist, coming projects: 27th sept Fylkingen with Emma Lloyd (UK) Violin, 24th nov Fylkingen with Emilie Girard-Charest (C) Cello.
• At Five, Sound Quartet concert tour in France 2017/2018. Ensemble is Thomas Bjelkeborn (SE), Philippe Moenne-Loccoz (FR), Paul Pignon (SE), Nadia Ratsimandrecy (FR) and Raquel Meyers (ES/SE).

CD production:
• Sound Quartet At5. Recorded at Abbatoirs Bourgoin-Jallieu during residencies in France 2016/2017, ensemble is Thomas Bjelkeborn(SE), Philippe Moenne-Loccoz (FR), Paul Pignon (SE), Nadia Ratsimandrecy (FR) and Raquel Meyers (ES/SE)

The following composers and musicians have collaborated with Sound Quartet for new music and concerts: Viv Corringham(US), Blanca Regina(ES), Andrew Woodhead(UK), Emma Lloyd(UK), Jess Aslan(UK), Lisa Ullén (SE), Frøya Dahlø(NO), Josep Lluise Galiana(ES), Johan Sundberg(SE), Olle Åberg(SE), Edith Alonso(ES), Julian Bonequi(MX), Nina de Heney(SE), Gregorio Jimenez(ES), Anthony Maubert(FR), Mark Pilkington(UK) and Per Ålund(SE). The following have appeared as visual artists: Viktor Zeidner (SE), Blanca Regina(ES) and Michael Larsson(SE). The first initiative for SQ was in 1992 by Thomas Bjelkeborn and Philippe Moenne-Loccoz out of experimental research at EMS Stockholm and MIA Annecy.

Picture of SQ at Audio Art Festival 2014. In the past Sound Quartet often toured as a trio with a duo setting on stage extended with visuals including Thomas Bjelkeborn, Paul Pignon and Viktor Zeidner often extended abroad by local artists.