I posted a screen shot of the tempo map (Logic 8) of a Blüthner Digital Model One rendition of Chopin's Prelude in C minor (Op 28 no. 20) as well as a movie http://www.proaudiovault.com/Chopin_...c_TempoMap.mp4
The classical variable pedal patch with 45% dynamic range was chosen for BDMO.

As you can see and hear the tempi values changes with ever quartner note of this sequence. This is meant to accurately emulate the tempo changes of a world class classical pianist. These changes clearly add to the interpretation. There are many classical midi files of this work - give them a listen and compare ...

Ernest Cholakis
Numerical Sound/ProAudioVault