I’ve experienced that the Aeros interprets my initial guitar pattern in what I, as a musician, would consider double time. I mean, if I played with a drummer who thought that that was the beat, I would not be playing with that drummer very long… I have the aeros hooked up to a Roland TR-6S. I never actually checked what BPM the Aeros thought we were doing, but I’ll have a look-see next time it happens.