In 1967, credited as "Soma", he played sitar on the Incredible String Band's album The 5000 Spirits or the Layers of the Onion.
In 2002, Rowan Williams, the Archbishop of Canterbury, chose "The Hedgehog's Song" for his appearance on the BBC radio programme Desert Island Discs.
5000 metres | The Onion | Powerman 5000 | onion | Formula 5000 | 5000 | ''The House of the Spirits'' | Southern Wine & Spirits | Pennsylvania 6-5000 | Origin: Spirits of the Past | Onion | Juliet of the Spirits | Final Fantasy: The Spirits Within | Athletics at the 2008 Summer Olympics – Men's 5000 metres | 5000 Volts | Wines & Spirits | Wilshire 5000 | When Spirits Are Calling My Name | Travel Air 5000 | The 5000 Spirits or the Layers of the Onion | Spirits of Rhythm | Spirits in prison | Spirits Having Flown | Purple Onion | pearl onion | Onion News Network | Onion Futures Act | .onion | Nikon Coolpix 5000 | Ken Onion |