Starting in the early 1950s, the sculptor François Baschet and his engineer brother Bernard built a range of “structures sonores” – a term variously translated as sound structures or sonorous sculptures. Among their creations was the poetically named Voice Leaf, a glossy metallic shield that transformed the performer’s voice into an unearthly keening wail. Most famously there was the Cristal Baschet, a glittering array of glass rods that produced piercing drone-tones when rubbed by the performer. Teaming up with the composer-musician Jacques Lasry and his organ-playing wife Yvonne as the ensemble Lasry-Baschet, they performed concerts and made records like Chronophagie. This TV program appears to date from the late Fifties and unless you understand French, your best bet is to skip to about six minutes in, when Monsieur Lasry appears looking a bit like a Gallic Keith Moon. Duetting with his wife, Lasry showcases the shimmering sight-and-sound of the Cristal in operation, his fingers periodically dipping into a bowl of water to keep his tips lubricated. If you are of a puerile, Viz-reading mentality, you might well find all this stroking of perpendicular rods suggestive and snigger-worthy, despite the angelic purity of the tones generated by the frotting fingers of the Frenchman. Among the many Baschet-related videos on YouTube, look out for a recent, full-colour clip of the Hope Ensemble performing Erik Satie’s Gnossienne no. 1.

• Simon Reynolds