Plus Minus is a music group that formed in 2003 specializing in contemporary classical music.

There are eight members in the ensemble:

• Mark Knoop
  Mark Knoop
  Mark Knoop is an Australian pianist.Knoop was born in Hobart, Tasmania. He studied piano at the Victorian College of the Arts and later in Europe with Stephen McIntyre, Herbert Henck, James Avery and Peter Feuchtwanger, as well as conducting with Robert Rosen...
  
   -- conductor/piano/accordion
• Vicky Wright --clarinet(s)
• Roderick Chadwick
  Roderick Chadwick
  Roderick Chadwick is a England classical pianist.- Biography and career :Chadwick was born in Manchester, England, and studied music at ’s School of Music, St Catharine’s College, Cambridge, and the Royal Academy of Music, where he studied with Hamish Milne...
  
   -- piano
• Tom Pauwels -- (electric) guitar
• Marcus Barcham-Stevens -- violin
• Alex Waterman -- cello
• Joanna Bailie & Matthew Shlomowitz
  Matthew Shlomowitz
  Matthew Shlomowitz is a composer of contemporary classical music.He was raised in Adelaide, Australia and studied with Bozidar Kos at the Sydney Conservatorium of Music and with Brian Ferneyhough at Stanford University...
  
   -- auxiliary instruments.

Plus Minus's programming features a mixture of avant-garde and experimental traditions, focussing particularly on open-instrumentation pieces such as Stockhausen's Plus Minus, Andriessen

Louis Andriessen

Louis Andriessen is a Dutch composer and pianist based in Amsterdam. He teaches composition at the Royal Conservatory of The Hague...

's Worker's Union and Cardew

Cornelius Cardew

Cornelius Cardew was an English experimental music composer, and founder of the Scratch Orchestra, an experimental performing ensemble. He later rejected the avant-garde in favour of a politically motivated "people's liberation music".-Biography:Cardew was born in Winchcombe, Gloucestershire...

's Treatise. They have done profile concerts of Peter Ablinger, Michael Finnissy

Michael Finnissy

Michael Finnissy is an English composer and pianist. His music is characterised by the range of extremes often found in his work; opposing binary structures are found commonly, often seen as juxtaposing textures, register and tempi...

, Christopher Fox, Bryn Harrison and Phil Niblock, and have premiered works by Laurence Crane

Laurence Crane

Laurence Crane is a composer of contemporary classical music.He studied at Nottingham University with Peter Nelson and Nigel Osborne....

, David Helbich, Damien Ricketson

Damien Ricketson

Damien Ricketson is an Australian composer of contemporary classical music. He grew up in Wollongong, New South Wales and performed early on in the world folk ensemble Sea Gypsies....

, Oyvind Torvund

Oyvind Torvund

Øyvind Torvund is a Norwegian composer.He studied composition at the Norwegian Academy of Music and Universität der Künste ; equally important is his background as a guitarist in rock and improvising groups...

, Erik Ulman, James Saunders, and Stefan Van Eyken.