Warble tones - and a request for new forum
[XPosted to Software Tools and Everything Else]
What exactly is a warble-tone? Is there a standard definition?
I wrote a little program that generates a WAV file of what I imagined a warble-tone to be. I frequency-modulated the center tone. It seems to work, which is to say, it has the correct center frequency, it warbles at the specified rate, and the RMS amplitude is .707 times peak. However, it sounds different from the warble-tone produced by Speaker Workshop given the same parameters. Mine has a higher perceived variation in frequency. It sounds as though it "warbles wider." One of us is wrong, and I suspect it is I.
I frequently have theoretical questions of the newbie variety. Often I figure the question has been asked and answered, but searching proves time-consuming futile. There is no good place for my questions on the diyaudio forums. I am posting this to "Everything Else," where it will be seen by few and lost among, well, everything else. I would like to see a forum or forums for theoretical, best-practices, and newbie questions. The good answers could be made sticky and locked.
[Added in proof: Maybe Speaker Workshop's spread-parameter is total. I figured that a warble of 1/3 octave means it varies in instantaneous frequency from 3/4 to 1 1/3 times the center frequency. Which brings up a third question. Speaker Workshop is supposedly open-source. Does anyone know a painless way to snarf the source code? I tried to install Turtle CVS, but no joy.]
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Davy Jones
Last edited by Dave Jones; 31st December 2010 at 03:53 AM.
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