I think this one is a midi file. I think when playing this piece at this pace, there would be more 'bite' and 'bounce' to the bow - try listening to this rendition of the same piece to hear what I mean and compare to Sam's work:
Man I hate it when engineers make audience mics out of phase thinking that is sounds like Dolby surround. It's not your fault though Sam. It's actually not 180 degrees out, but probably run through a plug-in that alters the phase of random frequencies.