Music made by your brainwaves
31 August 2013 Last updated at 00:11 BST
If your thoughts could power music, what sound would they make?
The BBC met programmer Adam Williams who, along with team members Robert Wollner and Alex Wakeman, created a program which uses a brainwave-sensing headset to power a musical composition.
The Soul Filter was on show at Art Hack, an event organised by 3beards, a company which specialises in organising gatherings of east London's start-up community.
Mr Williams' father offered up his brainwaves to give the technology a try.
Video produced by Dave Lee and Nastaran Tavakoli-Far