Radiohead can see how their last album ''alienated'' people.

The 'Nude' group released 'The King of Limbs' with no prior promotion and only one week's notice last year, and singer Thom Yorke acknowledges it was difficult record for many of their fans to digest.

He told Rolling Stone magazine: ''I can see why it's alienated people. I didn't realise it was on its own planet.

''It was amazing just to put the record out like that. But then it didn't feel like it really existed.

''But that was the consequence of what we chose to do. You can either get upset about it, or say, 'well, that's not good enough.'''

Guitarist Johnny Greenwood added the band had hit ''brick walls'' during the making of the record.

He added: ''The brick walls we tended to hit were when we knew something was great, like 'Bloom', but not finished.

''We knew the song was nearly something. Then Colin [Greenwood] had that bass line and Thom started singing.

''Those things made it a hundred times better. The other stuff was just waiting for the right thing.''

Radiohead are playing in the US throughout May and June before heading to Europe in July.