Minuet and Trio This song for piano is in 3/4 time and has a key and time change in the middle returning to 3/4 at the end. The song gives experience in changing from the key of G to C and back to G. The time changes from a minuet to a 4/4 trio and back to a minuet. This is a perfect song to introduce classical music to your students. The varying time signatures and key signatures makes this an interesting piano piece to talk about minuets and songs with more than one movement. Enjoy