Hello groups,



I am back here with another wild idea and wonder if/how to make it work.



I have heard piezo-crystal based speakers can be used (2 at once) to

produce a sound where the listener is sitting, by emmiting very high

frequencies and emmiting them so that the diffirence between both is the

hearable sound... or something like that.



Now curiously enough I have noticed that a modern hi-fi will have these

piezo-speakers installed for the higher frequencies (that a normal

tweeter cannot reproduce well).



Now, would it be possible, with some ordinary stereo music coding, to

cause the previously described piezo effect? I guess the main problem

would the the sampling frequency... Will the 44.1 kHz of CD quality

suffice? How about a 96 kHz sampling frequency of a tracker (ok, still

need a better sound card for that)?



Also if it is possible I would like to know what do I need to send to

the speakers to produce a specific sound by the piezo effect.





P.S.: I am also very interested in the other fenomena in sound that can

be utilized to make a song sound better (as for example, the strong

'current' of sound that cannot really be heard untill it bounces off of

something).





Thanx in advance.



			Observer aka DustWolf aka CyberLegend aka Jure Sah



C'ya!



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