On Android (like, 4.2 or something) with Firefox, the page and the CSV just displays `null` for alpha, beta and gamma. And the calculated rate is 9.1 samples per second, which seems way too low to extract any speech details even if the data were valid.
This is distinct from the "No device motion data" message presented on my desktop though. So it seems to me that the page sees that a gyroscope is present, and requests data from it, but Firefox is just feeding it null values?
I haven't tried the apk yet.
But it's impossible to filter a signal in the time domain without introducing a phase shift (i.e. a delay). As a result, you cannot remove that extra frequency information before sending the data to an application without making sacrifices on latency.
