U2 have said in an interview with the Irish Times that they are under more pressure to record a good album now since they recorded 'Achtung Baby' 20 years ago. 

Their iconic frontman, Bono, said that they need to see if they can play "small music" anymore and if they can find a reason to make a new album:

"...We can play the big music in big places. But whether we can play the small music, meaning for the small speakers of the radio or clubs, where people are living, remains to be seen. I think we have to go to that place again if we're to survive...There are so many U2 albums out there. We need a reason for another one. The whole point of being in U2 is that we're not here to be an art-house band. Our job, as we see it, is to bring the art house to the mainstream; our job is to puncture the mainstream".

The Irish star also defends the sales of their 2009 album, 'No Line On The Horizon', which reached about five million:

"...It's been an amazing success for an album which is quite a complex piece of work and doesn't have one single pop song on it...People say 'Get On Your Boots' was the wrong single, but it's great live. Unfortunately in the last few weeks of finishing the album, we didn't have the objectivity. We figured out 'Get On Your Boots' later, when we were on the road and it became a much better song. I think 'Unknown Caller' is a classic, as is 'Moment Of Surrender'."

The 20th Anniversary edition of 'Achtung Baby' is to be released on October 31.

Check out U2's live performance of 'Get On Your Boots' and 'Moment Of Surrender':