Peter Maxwell Davies on his Tenth Symphony
31 January 2014 Last updated at 17:20 GMT
Celebrated composer, Sir Peter Maxwell Davies has created his tenth symphony.
The piece is based on architectural proportions, inspired by the 17th Century architect Francesco Borromini.
People can hear the world premiere live on Radio 3 on Sunday evening at 19:30 GMT. Click here for further details:
The BBC's Arts Editor Will Gompertz spoke to him during rehearsals.