The shortest comma pumps I've ever found

Hi there.

The ordinary comma pumps which are characteristic for meantone are made of 4 chords per pump. In contrast, the following ones are made of three chords per pump -- I'm not sure if any other three-chord pumps can be made at all (i.e. in other 2D temperaments).

After a short introductory melody, the chords take care of everything.

https://dl.dropboxusercontent.com/u/8497979/pp_2d_bp_pumps.mp3

Petr