Muddy Waters doing Mannish Boy resounds down Princes Street,

as they test the barrage of PAs for the Festival parade.

Passing each stack in turn, I hurry towards Lothian Road.

The blues is consumed by a burst of Basement Jaxx -

(Don't worry! Don't Panic!)

- which degenerates into Cher's big vocoder hit.

The mic-check

ricochets off Burger King...