Ah, you guys are great. I'd got stuck going down the "this is sound" track, whereas you've clearly pointed out to me that I want to do was graph something.
The (non-linux) suggestion of wolfram alpha was also great - using it, I can see what I want to do, it reminds me of the formula so I can plug that into the graphing solution (and actually plays the sound so does more than I need). i've plugged the formulae into a spreadsheet and can see how it all fits. The results aren't quite what I expected (which was why I was doing it) but now I understand what I wanted to: some of the physics behind a "ringing chord". Now to download Octave so I don't get stuck again... Kerry. On Thu, Jan 10, 2013 at 5:48 PM, Eliot Blennerhassett <[email protected]>wrote: > On 10/01/13 17:22, Eliot Blennerhassett wrote: > > On 10/01/13 16:55, Mayes, Kerry wrote: > >> Hi all > >> > >> I'm looking for some software that will display up to four sine waves > >> added together. My trouble is I don't really know what search terms to > use! > >> > >> What I am trying to demonstrate is the difference between > >> equal temperament and just intonation - two ways of tuning in music. > >> For example, the note A is generally 440Hz, 880Hz, ... A just tuned > >> 3rd (Db) is 550Hz whereas the equal tempered 3rd is 554.37Hz (440 * > >> 2^(4/12)). > > > Or using wxmaxima... > > f1:440; > f2:550; > w : 2 * %pi; > plot2d(sin(w * f1 * t) + sin(w * f2 * t), [t, 0, 0.1]); > > > > _______________________________________________ > Linux-users mailing list > [email protected] > http://lists.canterbury.ac.nz/mailman/listinfo/linux-users > -- *Kerry Mayes*, Principal Consultant Mayes & Associates Financial modelling for better decisions *www.mayes.co.nz*
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