Visual Music is an art form that can enhance the emotional impact of music performance through the simultaneous projection of mood-congruent visual imagery. I illustrate the transcendence of the art by reference to two of my pieces. In Abîme des oiseaux, it was Olivier Messiaen’s ability to accurately transmute a wide range of celestial colours into audible sound combinations that enabled me to hear ‘the colours that moved with his music’ and, thereby, see what was in his mind’s eye. Visual mental imagery during music listening plays a pivotal role for the majority of listeners. In creating my own visual responses to music, I seek to modulate listeners’ emotional response by implanting my own form of visual expression in their minds. This is both the challenge and delight of making Visual Music. In my latest work Passeggiata, based on Luciano Berio’s Sequenza IXa for solo clarinet, I’ve used patterns and images gleaned from Deep Dream artificial intelligence to give an impression of an other-worldly ‘passeggiata’ in and around a mountain village in Liguria – the province of Italy where Berio was born and lived.