I watched Gattaca last night, a 90s sci-fi film about genetic engineering. At one point, the main characters attend a piano concert and find out the pianist has six fingers. “It’s the only way he can play this song” says one character to the other. I know how that feels…

On a music sheet there is a number to help you know which finger to use when playing a note. The numbers run from 1 to 5 with 1 being your thumb and each number, a finger. So far so simple. If the music sheet shows a C and 1 then you know where to place your hand.

The only problem with this numbering is that 5 can mean not just the fifth note but the sixth note too. For a pianist, 5 can also mean 6 and the only way to know this is to read the note and spot whether it’s a G (5) or A (also 5 but really a 6).

Why not just call it 6? We may not have 6 fingers but at least we’d then be able to move our hands, or stretch a wee pinky to reach it. Calling two notes the same number (5) just leads to confusion. Let’s just call it 6.

Other than that, I’m starting to understand how read sheet music and can now recognise a handful of simple notes and how to play them.