Research: Tempi Changes on the Blüthner Piano

Here is the Chopin Prelude in C minor (Op 28 no. 20) on the Bl Digital Model One. Included is the tempi map of this sequence (done on Apple's Logic 8). The tempi changes on ever quarter note of this sequence. The tempo map was inspired by Alain Planes recording of Chopins Preludes Op 28 (Harmonia Mundi).

Here is the recording in mp3 form.

Here is a movie where you can see the tempo changes (in Apple's Logic 8) and hear the piano performance.

This is a closeup view perspective

Here is a screenshot of the tempo map in Logic - here you can see the overall tempi changes.