File talk:Byrd Mass for Four Voices score.jpg

This simply won't do. The work is not 'written in 4/2 time' (though some modern editions give it thus) / There is no evidence that it was performed in Elizabeth's private chapel, and in view of its background in clandestine Catholic celebrations it is highly unlikely that it would have been. In his discussion of transposition the author seems to assume the existence of an unvarying pitch-standard, whereas in reality unaccompanied vocal groups simply pitched a work at any suitable level and in 'transposing' the Mass setting a modern editor simply does what sixteenth-century singers also did.