The exhibition - Dartmoor Water and Light- also marks the release of Mark's first CD album, Sea of Grass, which features 12 tracks of multi-instrumental music inspired by the moor.

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He has offered a refund and a free copy of the child-friendly CD to anyone who bought the album on Sunday.

BBC: Comedian Jay Foreman swearing CD sold at kids show

An original song called "Stranded (Haiti Mon Amour), " which was performed by Bono, The Edge, Jay-Z and Rihanna during the Haiti concert is now the most downloaded song on iTunes and a CD version of the concert is the biggest one-day album pre-order in iTunes history.

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At times they could be outright avant-garde, like releasing an album on four CD's which were all supposed to be played at the same time.

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The seven-song Meanwhile in the Park will be available on CD beginning Sept. 23, an appropriate fall date for a rainy-day album.

NPR: Ed Laurie: 'Meanwhile In The Park"

The most improbable move for Premier Cru was Katsiris' decision to make the first album an old-fashioned vinyl record, instead of a CD.

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Earlier this week, it was revealed the group's greatest hits album, Gold, was the UK's biggest selling CD - boosted by the hit musical Mamma Mia!

BBC: Abba museum to open in Stockholm

The survey's findings oppose the music industry's long-standing argument that internet downloading is responsible for a slump in CD sales, with album sales falling 5% in the last year.

BBC: File swappers 'buy more music'