Just what I needed.

The BPM lock function is just what I needed for pace-based exercise.
Also, being able to adjust the song speed is very useful for ballroom dancing.
The only other useful thing I can think of would be the ability to set in and out points on songs to eliminate long intros, etc., to blend the next song right into the dancing part of the song.

fundypan about Tempo Magic, v1.3.6