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Wiritng an equation for a recorded sinusoidal noise
Posted: Tue Mar 24, 2009 10:32 pm
by inflames
How would I go about writing an equation for the graph of a sinusoid that is displayed in audacity?
Re: Wiritng an equation for a recorded sinusoidal noise
Posted: Tue Mar 24, 2009 10:35 pm
by kozikowski
This sounds like the description of the first half of a job. What's the rest?
Koz
Re: Wiritng an equation for a recorded sinusoidal noise
Posted: Tue Mar 24, 2009 10:41 pm
by inflames
Well basically the job is to create an instrument for my math class, play 3 notes with it, record on computer, analyze in audacity, and construct an equation for each sinusoid. Doesn't seem like it would be too difficult as I know how to construct equations fairly well but I'm not sure as to the period/amplitude units in audacity.
Re: Wiritng an equation for a recorded sinusoidal noise
Posted: Wed Mar 25, 2009 3:46 am
by steve
Amplitude is on a scale -1.0 to +1.0 (see vertical scale on left side of the track)
In the selection tool bar at the bottom, you can set it to show the length of a selection in a variety of units, for example, "samples" or milliseconds. (Samples will be more accurate, and you can derive the time in seconds from the sample rate).