Ville: It’s really very simple. I asked what the maximum log rate was, and I got an answer from James himself:
moosh.im/f/topic/measuring-watt-hours/#post-15307 (including the entire link causes an ugly big graphic to cover up the rest of the message – trying a truncated link instead….)
If you set the buffer depth to 32 and sample rate to 4000Hz, then leave it to log, you’ll see a sample rate of just under 125Hz in the log. Is that what you’re looking for?

I’ve tested it, and so far, I am unable to reproduce that rate, so I am reporting this discrepancy. I am only trying to reproduce HALF that rate, by the way, so I’m even being nice. ;^)