That PICO appears to be of a usable size.
Would this be able to play back sounds other than beeps/buzzes such as a .wav file (or one converted to a usable format) ? (if it can be connected to a small speaker of some kind of course)
As for the 'speed' perhaps that isnt the right term. I want it so that if the device moves quickly it plays sound #1, if it moves slowly it plays sound #2. (as an example)