Spectrum has been played on NTS over 30 times, featured on 31 episodes and was first played on 22 November 2013.

Spectrum is a project of Peter Kember, a British musician more usually known as Sonic Boom, and founding member of the band Spacemen 3. Sonic Boom's first solo album, Spectrum, was recorded in 1989 while Spacemen 3 were still together, and featured the other members of the group. However, when Spacemen 3 disbanded in 1991, Kember recruited new musicians for the group Spectrum.

Initial Spectrum releases carried on from the sound of late-period Spacemen 3, featuring conventional songs and a regular band. First single "How…