even more smoother stepping when djay is used on the crosstrainer ;-)

Why not using gyroscope or other sensors in iOS Device for selecting faster or slower music when user is more active. Perhaps also as a feature of Autoplay.
Or it would be nice to alter BMP / speed of a track when there’s more activity.
This would make me a much smoother stepping when I use it on the crosstrainer - or doing other workout or sports.