Picasso's Guitars

Somewhere, once, i read someone quote Jean Cocteau about wanting to hear Picasso's guitars. At the time i wasn't aware of Picasso's paintings of guitars, so to me it was a completely ethereal idea. The concept of cubism applied directly to the sound of a guitar, was my understanding, not wanting to hear the instruments themselves. So i thought to myself:

What about Jean Cocteau's guitars?