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Raucous cheering and stamping accompanied Eric Whitacre’s entrance and he looked every bit the part of rock star as he charismatically took to the mic to introduce this evening’s concert. Never before, he told us, had he been to a choral concert that made him seriously consider stagediving.

It isn't often you hear six members of the Estonian Television Girls Choir join forces with the Holst Singers and Imogen Heap to perform a live a cappella soundtrack to a 1920s French surrealist film about a libidinous priest. But I am delighted to have seized the opportunity last night, when this bizarre setup hit the Camden Roundhouse as part of this year's genre-baiting Reverb festival.

I thought it best, given the sub-zero temperatures, to get out of the house and save on heating bills, and so I consulted www.bachtrack.com to see what might be on, and was pleasantly surprised to see that Sibelius 2nd was to be performed in a local church.