Eh, these are bound to be more like Shazam guess-that-tune signatures, with behavior wildly more loose than any cryptographic hash like an MD5. Conside that th

Eh, these are bound to be more like Shazam guess-that-tune signatures, with behavior wildly more loose than any cryptographic hash like an MD5. Conside that the web browser's desktop/laptop microphone and the cellphone/telephone microphone will probably never produce identical audio samples, if not due to the actual transducers, then simply due to proximity to various ambient audio sources like the user's breathing versus fan motors attached to a laptop shell or desktop case.