What to use for graphing sounds of instruments

330s

Hello,

For my physics EEI I am wanting to look at sound frequencies. What I plan to do is to get a guitar and play a note, lets say a "c natural". Then I want to play a "c sharp" and then compare the two notes. I want to be able to find the amount "beats" over a duration of say 1-2 seconds and then compare to something that is more pleasant sounding. ie. a "c" and a "g" . And find how many beats there are over 1-2 seconds. I want to find if more beats are better or less beats.

Now my problem is that I have a program, Datastudio which can pick up me playing my instrument through my computers microphone. However I can not figure how to use the program or if there is a program function that allows me to go | F2 - F1 | = Fb F being frequency, 2 and 1 being different notes of different frequencies.

Any other programs out there that can do what I am requiring please tell me about. But if there is a way to work Datastudio please help, I can't work it out.

Thanks, Will

schip666!

You don't need any thing but a calculator and this chart:
http://www.seventhstring.com/resourc...equencies.html
just subtract the frequencies of the two notes .... it's not so much the number of beats but the integer ratios. Also, the western tempered scale fudges all the notes such that they don't quite match up anyway, compare it with "Just Intonation".

But you may be interested in an audio spectrum analyzer. I don't remember if Audacity has one, but a quick search might find some free candidates.

diazona

Assuming that Data Studio records the waveform of the sound and stores it as a data run (which is probably what it does), you can use the calculator dialog to define a calculated value which is the difference between your two recorded sound waves. The Calculator button is up at the top, toward the center of the toolbar, if I remember correctly.

MATLABdude

Audacity is an open source program that you can use to capture and modify / manipulate sounds. It also lets you do a frequency analysis:
http://audacity.sourceforge.net/about/features