As an acoustician with a degree in acoustics I think I'm fairly qualified to answer this one.

There is no way that the accelerometers are a) sensitive enough to detect sound pressure waves over any meaningful frequency band and b) the accelerometers are in any way accurate enough to rely on correct measurements.

Also, there is no way that you can sample a stereo signal akin to the signal we pick up via our ears. You would need a setup like this to sample stereo airborne sound: http://www.bksv.com/products/telecom...type4128c.aspx

I do use accelerometers of a higher gade with signal processing equipment to measure ground-borne vibration. The in-built ones can be used for crude measurements but I think there's some software already out there much like the sound level meter software that uses the mic.

Sorry to put the idea down as I think these forums are what makes the os and the n900 so unique, but fact is fact.

Regards, James.