On Thu 10 Jan 2013 16:55:54 NZDT +1300, 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)). > > So adding the just intonation sinewaves should give a regular looking > pattern whereas the equal tempered will be a bit "messy". > > If anyone knows of anything like this, I'd be keen to hear.
This is a no-brainer: octave! Free from your local distro-server. Largely matlab compatible, though due to the exorbitant license fees of the latter, compatibility remains untested. You will need to work through some beginners tutorial, but octave is the sort of tool you won't ever want to be without. Just like bash. It's a matrix-oriented methodology. Create a sequence of numbers, stuff them into the argument of a sine function for the sine of each number, add, plot. About 7 lines total for 4 sine waves. Let me know if you get stuck and I'll cobble up some octave statements for you. Volker > *Kerry Mayes*, Principal Consultant > Mayes & Associates > Financial modelling for better decisions You might find octave fitting the bill here too. -- Volker Kuhlmann http://volker.dnsalias.net/ Please do not CC list postings to me. _______________________________________________ Linux-users mailing list [email protected] http://lists.canterbury.ac.nz/mailman/listinfo/linux-users
