A new sound work by Mark Vernon commissioned by Pixel Palace for BASIC.fm – a radio station hosting Broadcast Art, Sound & Independent Culture as a series of monthly audio streams. This piece kicks off the launch of a series of monthly commissions that will be hosted for a month on continuous play. Each piece responds to the brief of work that acts in a similar way to hold music or radio and television test signals. Test Signal consists of microphone tests collated from Mark’s personal archive of found recordings and interviews and can be heard throughout the month of November.