Hi William and all,
I thought there would some relevant things in your library. I'll look into your suggestions later. I don't have a patch that other people can look at, but I can try to explain the context a bit better:
I noticed your objects work in real time. As the analysis is to be done before the performance, I guess I'll either let the sound play throughout to get the analysis data, or then I'll divide the fragments through x analysis patches, to make it run x times faster.
In this case it is spoken voice, but I guess it could by anything else.
Best,
João
Hi João,
A measure that would give something near 1.0 for white noise and near 0 for a sine wave would be "spectral flatness", which is in the timbreID library. >But if you're looking to see how well a spectrum's partials line up harmonically, you won't find that in timbreID yet. One quick option would be to use >sigmund~ to get the current pitch, then search the spectrum for the amount of energy in bin ranges related to the expected set of harmonics. Compare >that with energy in non-harmonic bins. But then, for things like gongs that sound "pitchy" but have inharmonic spectra, that won't be much help. Depends >a lot on what you're trying to do.
You *might* find specSpread~ useful, which measures how widely or tightly energy is concentrated around the spectrum's center of gravity. It's in units >of Hz though.
On Thu, Jan 2, 2014 at 12:38 PM, João Pais jmmmpais@googlemail.com wrote:
Hello,
I wanted to ask if there are any suggestions for spectral "weight" analysis. With "weight" I mean a factor which would measure the harmonicity of a sound - e.g. white noise being 1, and a sinus/silence 0. Surely it exists a >>propper word for this already, but I don't know one.
Is there any external or patch around that does something similar?
Thanks,
jmmmp
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
--William Brent www.williambrent.com
“Great minds flock together” Conflations: conversational idiom for the 21st century
www.conflations.com