Cadence Shuffle

This idea is similar in purpose to another idea in this category, which I found during my pre-post search for prior art, but very different in technology and implementation. I think it stands apart and is an improvement over the other idea, but that's not my call as the poster to make, is it? Any MFD experts in the room?

Anyway, here it is:

Pedometers work by sensing movement. Shake them, and they count it. Some advanced pedometers even come with Mp3 players built in, and handlebar-mounted cycling computers can even measure and record cadence.

My idea is for a pedometer or cycling computer that measures cadence to select an appropriate song to match your speed at any given time. Given that people generally walk and run with heavier or lighter steps depending on mood, a sensitive-enough pedometer with the right software should therefor be able to detect moods with a certain degree of accuracy, and use that information combined with the user's cadence to select songs of not only the right tempo, but mood as well.

This could also probably be implemented in the form of a smartphone application using the device's built-in accelerometer, for those who prefer to use their phone for everything. See the Velocomputer app (linked to in the Wiki link I posted) for if you have doubts about a smartphone's accelerometer capabilities. I just downloaded it to my phone to test it, and it friggin' works! Even counts cadence and tells you with a weird voice if your cadence changes, saying 'cadence low' or 'cadence normal' or 'cadence high'.