Alexander Colour Theory Spectrum SequencerThe Colour Theory. Each step in its sequence is a new pathway to adventure, each new colour is part of a palette of mystery. Every moment brings a new surprise, as the patterns cycle and interact. The Colour Theory combines a versatile eight step sequencer with a powerful effects processor, creating rhythmic combinations seldom heard outside of a rack of synths. Its small but mighty, utilizing our Neo Series technology in a completely new way.