Pitch Control is a fully-playable instrument/art installation that invites the public to explore audiovisual possibilities. A keyboard controls a projected choir of 25 singers and each note on the keyboard - replaced by recorded singing - causes a different singer's image to appear projected in the room. A dynamic visual composition is built up as the instrument is played. The singers' faces are projected onto a group of identical shapes, to form a ghostly disembodied choir.

Pich Control was first seen at The Science Museum’s Dana Centre as part of Takeaway Festival May 19th-30th 2009.

Marcus Lyall is a director and artist, who has worked extensively with video in live music settings. He has designed and directed video content for concert tours, working with groups including The Chemical Brothers, U2, The Rolling Stones and Bon Jovi. This work has included animation, live action film and interactive design.
His video installation 'Slow Service' was shown at galleries including the ICA and FACT in the UK, the Seoul Museum of Modern Art and the Australian Centre for the Moving Image.
Marcus is currently developing a number of interactive art projects that explore the relationships between performance, music and the moving image.