I mentioned this last year, think re the Gt Snipe. I can remember reading that some survey workers play a short burst of song to locate breeding birds. A short burst usually results in an answer, if no further tape is played the bird considers it has seen off a rival, which strengthens its territorial behaviour. If more tape is played there is a chance the bird could consider the rival stronger and desert.
However this is not for the casual birder/photographer as a licence would be required, in theory to disturb almost any species in this way, not just Schedule 1 species.
Out of the breeding season however dont think there is any harm in attracting some species with a tape, ringers often do it.
As I said not sure where I read it but think it could have been a RSPB publication.
John