Why would you want to go to the trouble of doing all this when all you need is a simple wave generator. Download WavGen21 at http://www.netstudio.com.au/cyberhome/download.htm and you will be able to do all the things you mention below with ease. You can put as many sign signals together as you want, each at their own frequency, and each at their own individual volume. You can simulate all kinds of beating effects this way. Not pretty sounding things, but you can hear beating effects as clearly as is possible. Sign signals made audible will result in audible overtones, but they are very quite compared to what we get out of pianostrings. RicB Richard Moody wrote: > > I have wondered if a data base can be used to call up two or four > sounds at once. If I remember right old BASIC used to have four > sounds. > If there is a data base that allows sounds that would be a head > start. If there were a data base of sounds that would be even > better. > > If it is possible for a data base to call up 16 sine sounds at > once I would be interested in that!! > > For creating beat rates I don't know why it can't be done by > using the actual frequencies. Of course they would have to have > the right partials, ie , for 3rds each tone would have to have the > 4th and 5th partial. > So the question returns to, if two pure sine sounds are played > together, will beats result? Pure "sine sounds" means absence > of upper partials. > Or would the loudspeaker diaphragm or headphone speakers vibrate > in partials also? ---rm > > tinfo/pianotech -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html
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