Two newspapers with good quality info on music (4,9)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

TIMES + I (two newspapers), G (good), NATURE (quality). Usually two numbers, one over the other, at the beginning of a piece of music or in the course of it, indicating the number of beats per bar and the value of each beat. Despite what I have seen in some dictionaries this has no bearing on the tempo of the piece; that’s covered by words such as Allegro, Adagio etc.