Made me smile Martin, thanks mate I've had a shocking day. Bung your sop in the middle of your gob like Rasaan Roland Kirk and it would be complete. (note to myself: be more open to classical pieces)
Can I ask how you recorded it, both in terms of the equipment used and also the order of recording and how you kept the rhythm going and kept together ?
I noticed that, too. I can hear differences between the repeats but whatever is being measured there looks the same down to quite small details.I'm fascinated how in the soundcloud visual representation you can see the structure of the piece so clearly.