Sylvia Hallett has been played on NTS shows including Confused Temporalities , with Sea Of Vapours first played on 10 March 2016.

Sylvia Hallett studied music at Dartington, and then spent two years studying composition with Max Deutsch in Paris. She now works both as a composer and as an improviser, and has had pieces performed in Britain and Europe.

She has played in many international festivals since the late 1970s, working with several well-known and respected musicians, including Lol Coxhill, Maggie Nicols, Phil Minton, Evan Parker, and the groups Accordions Go Crazy, LaXula, British Summer Time Ends, The London Improvisers Orchestra, and the London Hardingfelelag. She also performs solo, (did a solo tour of Italy), and in duo with Clive Bell..

Projects with various theatre and dance companies include collaborations with the dancer/choreographers Miranda Tufnell, Emilyn Claid, From Here to Maturity, and Eva Karczag, and the live art puppeteers DooCot. Recently worked with Wonderful Beast. She has performed in a world tour with the Young Vic's highly accalaimed "Grimm Tales", and she has performed in and musically directed the music of Adrian Lee in The Royal Shakespeare Company's productions of "Comedy of Errors" , "Tales from Ovid" and "Canterbury Tales".

Sylvia has released three solo CDs, two on the MASH label, which contain songs, improvisations, and tape collage pieces derived from her compositions for theatre and dance. Her 3rd solo release, White Fog on the EMANEM label features the bowed bicycle wheel.

Commissions include incidental music for several BBC Radio Plays, most recently Two Men From Delft. Her work on Virginia Woolf's Kew Gardens received favorable reviews for its innovative use of voice and sound manipulation.