> This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ---------------------- multipart/alternative attachment The program that Ric Brekne mentioned, called WaveGen, can do the multiple sine waves at once. But it can't (apparently) do tenths-of-a-cycle per second. So whereas the C3E3 major third should beat at 5.2 (not counting inharmonicity), it can produce a 5.0. Ric's .wav files illustrate 1 bps through 10 bps, but they're all at 440 and 441, 440/442, etc through 440/450. I experimented today with making the beats sound more real by creating them with the frequency of the 4th partial of the upper and the 5t= h partial of the lower, and the wave is nice and accurate. Then I experimente= d with adding the fundamental as well ... sounded awful. But for now, I can report that this shareware program is capable of doing what you are asking for, and creating nice .wav files with two, three and possibly more sine waves at once. Stay tuned (so to speak)... .......... . jason kanter . jkanter@rollingball.com . jason.kanter@wamu.net . manager . learning & performance development . consumer loan servicing . washington mutual bank . office 206 490 6708 . cell 425 830 1561 . home (bellevue): 425 562 4127 . fax 425 562 4132 . 14847 ne 14th st . bellevue wa 98007 . (orcas): 360 376 2799 . 136 perch tree lane . eastsound wa 98245 ............................... From: "Richard Moody" <remoody@midstatesd.net> Reply-To: Pianotech <pianotech@ptg.org> Date: Sat, 4 Jan 2003 22:45:54 -0600 To: "Pianotech" <pianotech@ptg.org> Subject: Re: Excel beeps 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 ----- Original Message ----- From: Bill Ballard <yardbird@vermontel.net> To: Pianotech <pianotech@ptg.org> Sent: Friday, January 03, 2003 12:07 AM Subject: Re: Excel beeps > At 9:04 PM -0800 1/2/03, Jason Kanter wrote: > >Please give it a try... > >........... > >.. jason kanter . jason.kanter@wamu.net . jkanter@rollingball.com > > > >> At 4:06 PM -0800 1/1/03, Jason Kanter wrote: > >> >Anyone know how to program Visual Basic in Excel to produce x beeps > >> >per second? > >> > >> I could write it as a loop in my database. > >> > >> Bill Ballard RPT > >> NH Chapter, P.T.G. > >> > >> "Trust me, you've got all the equipment, You just need to read the manual" > >> ...........Reese Witherspoon in "Legally Blonde" > >> +++++++++++++++++++++ > >> > > What it would involve is a unit of sound (.wav or .aaif) say 1/30 > long. Then set up a "counter" variable to cycle things through the > correct number of loops, and one for the number of bps desired (not > nec . a whole number). One you've set the number of bps you want t > hear, that deterimnes a timed loop, in which the period is the > inverse of the bps. Whatever the period of the beat rate (and that > could even be input as +/- =A2 with an anchor frequency), the time > consumed by the 0.033 second sine wave .wav would remain constant. > For 2.5 pbs, it would be 8.25% of the 0.4 sec period. > > That's how I would do it. I have no idea whether the database app's > connection to the OS would have its own inefficiency. 'Puter > telephone dialing involves a delay of 4 sec between execution and the > internal modem dialing out. It's not just my database, it's the Palm > Desktop's phone dialer behaving that way too. > > Whether or not I could do it might or might not be useful to you. I'm > sure you don't have the Mac OS, and even if if polished up the > beat-rate generator real swell, it would still be just a database > file required the app to run it. The cross-platform version of this > database does exist, but the value of such a eat-rate generator would > probably be far less than the price to you of the database to run it. > (Although for $50, I could register a run-time file distributed only > by the database's web site.) > > I agree it would be a fun project. Say, you wouldn't need this this > to be learning arual tuning by any chance? <g> > > Mr. Bill Ballard RPT > NH Chapter, P.T.G. > > "I gotta go ta woik...." > ...........Ian Shoales, Duck's Breath Mystery Theater > +++++++++++++++++++++ > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/ed/86/9e/90/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC