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Index › Programming Questions & Help › Sound,  Music Libraries › Minim FFT getAvg() size

russdot YaBB Newbies Offline Posts: 17	Minim FFT getAvg() size? Jan 2nd, 2009, 8:32am   Does anyone know the actual upper bound for the size returned by FFT.getAvg(i)? Seems odd not to use 0.0 to 1.0 as the range... Thanks!

maku YaBB Newbies Offline Posts: 2	Re: Minim FFT getAvg() size? Reply #1 - Feb 17th, 2009, 11:35pm   Knock! I'll try to do some experiments to figure this out. I'll either find out or maybe even blow out my eardrums trying!

maku YaBB Newbies Offline Posts: 2	Re: Minim FFT getAvg() size? Reply #2 - Feb 17th, 2009, 11:49pm   My eardrums are fine... I created a simple audio source with a sine wave and modulated the freq and amp. It seems as if the upper bound changes based on the frequency. Is this because different frequencies carry different amounts of energy and the values are not normalized?

russdot YaBB Newbies Offline Posts: 17	Re: Minim FFT getAvg() size? Reply #3 - Feb 18th, 2009, 12:30am   Glad to hear your ear drums are fine I think that is a reasonable assumption... It's just too bad that a) the values are not normalized or b) there are no methods to extract the current 'upper bound' to be able to use in a variety of applications. Thanks for the reply!

ddf Full Member Offline Posts: 241	Re: Minim FFT getAvg() size? Reply #4 - Feb 24th, 2009, 3:19am   That function returns the value of the i<sup>th</sup> average band. The number of average bands is set directly by calling linAverages, or indirectly by calling logAverages. You can find out how many average bands there are by calling avgSize(). Does that answer it for you?
	http://www.compartmental.net

russdot YaBB Newbies Offline Posts: 17	Re: Minim FFT getAvg() size? Reply #5 - Feb 24th, 2009, 4:07am   ddf, I realize that it returns the ith average band (from 0 to avgSize()) However, my question was initially why getAvg(i) does not seem to be normalized at all (returning a float between 0 and 1.0, for example).

jaaq YaBB Newbies Offline Posts: 2	Re: Minim FFT getAvg() size? Reply #6 - Mar 20th, 2009, 10:22pm   what I do is keep an array that holds the highest value of every getAvg, and then map my getAvg from 0 to array[] and 0 to 1. the longer the music the plays, the more accurate it gets