Upon turning 61, a close friend told me I was entering my 7th decade!

Whilst the shock of being the same age as old people has slowly faded; I thought it was time for a piece that celebrated the number: 7.

Enter the 7th Dimension uses a proliferation of 7th chords, 7 bar phrases and 7 note motifs. It is entirely original but is cast in the mould of a frontier march into the future. Equally, it could be the soundtrack to a blockbuster video game.

In Christian and Jewish traditions, 7 rep...