The bass clef, an enduring hallmark of musical notation, sits proudly at the front of every staff it adorns, guiding performers toward the lower reaches of the sonic spectrum. Often called the “F clef ...

A flourish of gaily coloured audio tapes adorns the mantelpiece of an upstairs kitchen in Hackney. I pick out the only spine written in English. And there, in impeccable Letraset, reads the rather ...