Hi all, Yes, this seems to be a terminology bug - I don't really have an audio or dsp background. fwiw the audio analysis could do with some looking at, there are lots of quite easy ways it could be improved eg.
* a configurable number of bands * a way of specifying frequency directly and some gaussian falloff to tune in on particular instruments * beat detection * ... cheers, dave On Fri, 2009-05-22 at 10:46 -0700, Scott wrote: > I think the name Harmonic is what's confusing. My understanding is > that it's just a "frequency band". > > That said - it might be cool to support some alternate ways of binning > the fft data. > > On Fri, May 22, 2009 at 2:30 AM, Janosch Peters <[email protected]> wrote: > > Hi Gabor, > > > >> fluxus sums up the results of the fft calculation in 16 fft > >> bins. as far as i know, it calculates the fft for the buffer size you > >> specify in start-audio, then sums up the neighbouring values > > according > >> to a non-linear mapping table, which specifies for example that the > >> 9thharmonic will be calculated by summing up the bands between 28 and > >> 40. > > > > Ok so that means we have a fixed relation between frequencies and > > harmonics, e.g. a sine pitch of 440hz will always be assigned to the > > very same harmonic. So it might look like this: > > > > frequency(-band) harmonic > > 25...50...75 0 > > 50...100..150 1 > > 100..200..300 2 > > > > Here the fundamental frequency is 50hz. I guess frequencies far away > > from the frequency band center are weighted less? > > > > I recognized that "centering" frequencies within their frequency band > > would mean that the frequncie bands are overlapping, correct? > > > > And whats the purpose of assigning multiple frequncie bands to one > > harmonic? Wouldnt be a 1:1 relation ship (as in the example) enough? > > > > Sorry for asking so many questions, but Im going to give a presentation > > about fluxus, and I'd like to know a bit what Im talking about. :-) > > > > cheers, > > Janosch > > > > -- > > I'm trying a new usenet client for Mac, Nemo OS X, since 0 days. > > You can download it at http://www.malcom-mac.com/nemo > > > >
