A short, punchy chant is one of the key features of any protest march. Now Auckland jazz musician Callum Passells explores these rhythmic and repetitive chants in his new work LCR - short for Left, Centre, Right. The recent Black Lives Matter marches that he took part in were what got him thinking about protest chants as a music motif. Callum's premiering LCR at the Wellington Jazz Festival this Queen's Birthday weekend. It involves three musical trios on stage who'll collaborate and occasionally compete during the performance. Lynn Freeman talks with Callum about protest chants, and the appeal of his chosen instrument, the saxophone.