Fortunately I am not a synaesthete. If I were and keys were seen as colours, I would be having a nervous breakdown, or would live in psychadelic world a shifting shades or multiple swirling colours.

On the radio is Bright Blue Music by Michael Torke, who does see colours with keys. This piece is in D major, his bright blue key. A lively piece which managed not to shift from the chosen key, either for the musicians (as intended) or for me (as not considered). Can I assume that Torke’s music is so true to its colourful key that even my wobbly key sense lost its wobble? I doubt it, D is not one of the major shifters in my key cupboard.

For me D major in lively mood is a burnished Brown colour – wood or brass. Poetic not synaesthetic. But real nonetheless. This is probably why it is less shifty than some other keys.

That said, Saint Saens’ 1st Piano Concerto (D major) which I have only got to know since being given the Jean-Philippe set last year is in E flat to my new hearing. So perhaps Mr Torke’s writing palate does capture something of the key’s true character when it is in high spirits.

What colour would the slow 2nd movement of Mozart’s Clarinet Quintet be for Mr Torke, I wonder?