Crude spectrum analysis with FFT

Crude spectrum analysis with FFT

Date	2015-08-30 15:41
From	"F. Silvain"
Subject	Crude spectrum analysis with FFT
	Hey hey everyone, I wonder, is there already a UDO, that does spectrum analysis with textual output? My use case: I have mixed a song and would now like to see, if I have "wholes" in the frequency spectrum. My idea: use FFT and analyse the separate bins for amplitude peaks and write that to the console or a textfile. Is the idea feasable, is there existing code I could start from? If not, wht pitfall should I avoid in this approach? i.e. analyse too many bands, too few? Which methods are most adequate? I suppose mean and peak values. Anything else, that would yield practical information? Thank you for staying with me. Any help is very much appreciated! Ta-ta ---- Ffanci * Homepage: https://freeshell.de/~silvain * Twitter: http://twitter.com/ffanci_silvain * GitHub: https://github.com/fsilvain ------------------------------------------------------------------------------ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-08-30 19:50
From	Victor Lazzarini
Subject	Re: Crude spectrum analysis with FFT
	What kind of “wholes” are you looking for. It is it likely that the magnitudes of the spectral analysis will give you plenty of wholes, in between the peaks. Maybe you are thinking more in terms of the spectral envelope, which is a smooth line connecting the peaks? ======================== Dr Victor Lazzarini Dean of Arts, Celtic Studies and Philosophy, Maynooth University, Maynooth, Co Kildare, Ireland Tel: 00 353 7086936 Fax: 00 353 1 7086952 > On 30 Aug 2015, at 15:41, F. Silvain wrote: > > Hey hey everyone, > I wonder, is there already a UDO, that does spectrum analysis with textual > output? > > My use case: I have mixed a song and would now like to see, if I have "wholes" > in the frequency spectrum. > > My idea: use FFT and analyse the separate bins for amplitude peaks and write > that to the console or a textfile. > > Is the idea feasable, is there existing code I could start from? If not, wht > pitfall should I avoid in this approach? i.e. analyse too many bands, too few? > Which methods are most adequate? I suppose mean and peak values. Anything > else, that would yield practical information? > > Thank you for staying with me. Any help is very much appreciated! > > Ta-ta > ---- > Ffanci > * Homepage: https://freeshell.de/~silvain > * Twitter: http://twitter.com/ffanci_silvain > * GitHub: https://github.com/fsilvain > > ------------------------------------------------------------------------------ > _______________________________________________ > Csound-users mailing list > Csound-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-users > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here ------------------------------------------------------------------------------ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-08-30 19:59
From	Victor Lazzarini
Subject	Re: Crude spectrum analysis with FFT
	Ops, but is it a hole you are looking for? ======================== Dr Victor Lazzarini Dean of Arts, Celtic Studies and Philosophy, Maynooth University, Maynooth, Co Kildare, Ireland Tel: 00 353 7086936 Fax: 00 353 1 7086952 > On 30 Aug 2015, at 19:50, Victor Lazzarini wrote: > > What kind of “wholes” are you looking for. It is it likely that the magnitudes of the spectral > analysis will give you plenty of wholes, in between the peaks. > Maybe you are thinking more in terms of the spectral envelope, which is a smooth line > connecting the peaks? > > ======================== > Dr Victor Lazzarini > Dean of Arts, Celtic Studies and Philosophy, > Maynooth University, > Maynooth, Co Kildare, Ireland > Tel: 00 353 7086936 > Fax: 00 353 1 7086952 > >> On 30 Aug 2015, at 15:41, F. Silvain wrote: >> >> Hey hey everyone, >> I wonder, is there already a UDO, that does spectrum analysis with textual >> output? >> >> My use case: I have mixed a song and would now like to see, if I have "wholes" >> in the frequency spectrum. >> >> My idea: use FFT and analyse the separate bins for amplitude peaks and write >> that to the console or a textfile. >> >> Is the idea feasable, is there existing code I could start from? If not, wht >> pitfall should I avoid in this approach? i.e. analyse too many bands, too few? >> Which methods are most adequate? I suppose mean and peak values. Anything >> else, that would yield practical information? >> >> Thank you for staying with me. Any help is very much appreciated! >> >> Ta-ta >> ---- >> Ffanci >> * Homepage: https://freeshell.de/~silvain >> * Twitter: http://twitter.com/ffanci_silvain >> * GitHub: https://github.com/fsilvain >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Csound-users mailing list >> Csound-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/csound-users >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here > > > ------------------------------------------------------------------------------ > _______________________________________________ > Csound-users mailing list > Csound-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-users > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here ------------------------------------------------------------------------------ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-08-31 12:17
From	"F. Silvain"
Subject	Re: Crude spectrum analysis with FFT
	Victor Lazzarini, Aug 30 2015: > Ops, but is it a hole you are looking for? Oh yes, of course it was. One of my favourite mistakes even at school. :) I'm looking for frequency bands, which could do with a little extra. Making use of unexplored headroom... ... Ta-ta ---- Ffanci * Homepage: https://freeshell.de/~silvain * Twitter: http://twitter.com/ffanci_silvain * GitHub: https://github.com/fsilvain ------------------------------------------------------------------------------ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-08-31 12:26
From	Victor Lazzarini
Subject	Re: Crude spectrum analysis with FFT
	If you are looking for magnitudes below a certain threshold, you could use pvsanal & pvsftr, then read the table to check it. ======================== Dr Victor Lazzarini Dean of Arts, Celtic Studies and Philosophy, Maynooth University, Maynooth, Co Kildare, Ireland Tel: 00 353 7086936 Fax: 00 353 1 7086952 > On 31 Aug 2015, at 12:17, F. Silvain wrote: > > Victor Lazzarini, Aug 30 2015: > >> Ops, but is it a hole you are looking for? > Oh yes, of course it was. One of my favourite mistakes even at school. :) > > I'm looking for frequency bands, which could do with a little extra. Making use of unexplored headroom... > ... > > Ta-ta > ---- > Ffanci > * Homepage: https://freeshell.de/~silvain > * Twitter: http://twitter.com/ffanci_silvain > * GitHub: https://github.com/fsilvain > > ------------------------------------------------------------------------------ > _______________________________________________ > Csound-users mailing list > Csound-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-users > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here ------------------------------------------------------------------------------ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-08-31 12:30
From	Victor Lazzarini
Subject	Re: Crude spectrum analysis with FFT
	I meant pvsanal & pvsftw ======================== Dr Victor Lazzarini Dean of Arts, Celtic Studies and Philosophy, Maynooth University, Maynooth, Co Kildare, Ireland Tel: 00 353 7086936 Fax: 00 353 1 7086952 > On 31 Aug 2015, at 12:26, Victor Lazzarini wrote: > > If you are looking for magnitudes below a certain threshold, you could > use pvsanal & pvsftr, then read the table to check it. > > ======================== > Dr Victor Lazzarini > Dean of Arts, Celtic Studies and Philosophy, > Maynooth University, > Maynooth, Co Kildare, Ireland > Tel: 00 353 7086936 > Fax: 00 353 1 7086952 > >> On 31 Aug 2015, at 12:17, F. Silvain wrote: >> >> Victor Lazzarini, Aug 30 2015: >> >>> Ops, but is it a hole you are looking for? >> Oh yes, of course it was. One of my favourite mistakes even at school. :) >> >> I'm looking for frequency bands, which could do with a little extra. Making use of unexplored headroom... >> ... >> >> Ta-ta >> ---- >> Ffanci >> * Homepage: https://freeshell.de/~silvain >> * Twitter: http://twitter.com/ffanci_silvain >> * GitHub: https://github.com/fsilvain >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Csound-users mailing list >> Csound-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/csound-users >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here > > > ------------------------------------------------------------------------------ > _______________________________________________ > Csound-users mailing list > Csound-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-users > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here ------------------------------------------------------------------------------ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-08-31 13:17
From	"F. Silvain"
Subject	Re: Crude spectrum analysis with FFT
	Victor Lazzarini, Aug 31 2015: > I meant pvsanal & pvsftw Thank you, I will give this a go. Would anyone have practical hints for the analysis? A factor or term to multiply somewhere to get more human readable results? Or anything of that sort? Thank you. ... Ta-ta ---- Ffanci * Homepage: https://freeshell.de/~silvain * Twitter: http://twitter.com/ffanci_silvain * GitHub: https://github.com/fsilvain ------------------------------------------------------------------------------ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here