I have a product that a person can skate on wearing hockey skates or running shoes. (www.stridedeck.ca)
I wish to add electronics. The only practical solution, since the foot begins and ends at different locations and speed, is to use a contact microphone to capture the vibration of the stride.

I would like to take this vibration from the piezo (contact microphone) and convert it into musical notes and the skater can hear the music while skating. This way, the user can actually make notes (music) with the exercise of the leg. The amount of force will give the individual notes A, B, C, etc. and the length of the stride will give the note’s length (an eight, quarter, half, whole note).

I look forward to your response.