Colin Greenwood on BBC 6 Music

Jonny and Colin Greenwood join Adam Buxton on BBC 6 Music's Sunday Service to play the records that might go on in the back lounge of a Radiohead tour bus, with engine noise underneath, until they own up to sitting in Colin's house outside Oxford. The real thing, Colin says, is fake wood veneer and rope lighting, like an out-of-town disco, and they have had drivers called the Exterminator and Heavy Duty. A hit with “Creep” in America meant the band skipped the van and went straight onto buses.

Jonny brings Squarepusher, which Thom Yorke gave him, and a Lebanese singer he emailed round the band in his excitement. Colin's picks include Glenn Brown's reggae cover of Isaac Hayes's “Do Your Thing”, found in the collection of Duncan, who looks after Jonny's guitars. Asked for a time when Yorke poured scorn on their taste, one of them remembers playing a mash-up of Celine Dion and Sigur Rós on the tour bus: “that was a tricky moment”.

Magazine's “Shot by Both Sides” was their older sister's record, and Radiohead have covered it. When Magazine re-formed they asked Jonny to join, and he said no, as he did to wandering past the back of a party scene in Curb Your Enthusiasm. Playing with another band makes him feel a fraud. “I'm fully convinced that someone will watch what I'm doing and go, oh, that's kind of all he does,” he says. His own job in Radiohead, Jonny says, is to supply all the wrong chords for Thom's songs, and he has convinced Yorke they are there on purpose. For The King of Limbs he spent ages writing his own recording software, and then someone told him “all you've done is build a really wonky rubbish version of Live”, the Ableton program that does it anyway. The one time they drank vodka before a show, in Pittsburgh early on, “your fingers remember what to play but your feet don't,” one of them says.

In a later Sunday Service Colin plays only South African records, after a trip there in January for the Children's Radio Foundation. He has loved playing records on these shows that break the recording rules of Radiohead's producer, Nigel Godrich: no saxophone, no Hammond organ and sometimes no bass. Jeremy Vine, once the BBC's Africa correspondent, joins him to remember a perfect grid of grannies dancing in step at Thabo Mbeki's inauguration in Pretoria in 1999.