[Csnd] offline fft
| Date | 2017-10-19 23:15 | |||||||||||||||
| From | Iain McCurdy | |||||||||||||||
| Subject | Re: [Csnd] offline fft | |||||||||||||||
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You can perform the analysis within a k-rate loop and write the file using pvsfwrite. This will create the .pvx file more or less instantly.
Sfile = "SoundFile.wav" kcnt = 0while kcnt<(filelen:i(Sfile)*kr) do asig diskin Sfile fsig pvsanal asig,2048,512,2048,1 pvsfwrite fsig,"analysis.pvx" kcnt += 1 od turnoff
From: A discussion list for users of Csound <CSOUND@LISTSERV.HEANET.IE> on behalf of Peter Burgess <pete.soundtechnician@GMAIL.COM>
Sent: 19 October 2017 21:28 To: CSOUND@LISTSERV.HEANET.IE Subject: Re: [Csnd] offline fft That's fair enough, Csound is a realtime audio language. If anyone can
point me in the right direction that would be great, otherwise, I might have found a way to do it in c++ using fftw and libsndfile. That could be adventagious anyway because there's some c++ magic I want to do to the resulting spectral data before I perform the real Csound action. On Thu, Oct 19, 2017 at 9:58 PM, Jeanette C. <julien@mail.upb.de> wrote: > Oct 19 2017, Peter Burgess has written: > >> I've got my wav file in a function table. But I can't find any pvs >> opcodes that will analyse data from an f-table. Am I missing >> something? Or is this the wrong set of opcodes for offline analysis? > > The pvs opcodes were especially designed for live realtime processing. > Adhoc, I can't suggest an alternative opcode. The pvanal utility can > convert .wav files to phase vocoding formats, but that might not serve > your purposes. > ... > > Best wishes,, > Jeanette > > -------- > * website: http://juliencoder.de - for summer is a state of sound
> * SoundCloud: https://soundcloud.com/jeanette_c > > I thought love was just a tingling of the skin <3 > (Britney Spears) > > Csound mailing list > Csound@listserv.heanet.ie > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
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| Date | 2017-10-19 23:43 | |||||||||||||||
| From | Peter Burgess | |||||||||||||||
| Subject | Re: [Csnd] offline fft | |||||||||||||||
Aha, fantasic. I'll give that a shot too, thanks Iain! On Thu, Oct 19, 2017 at 11:15 PM, Iain McCurdy <i_mccurdy@hotmail.com> wrote:
-- | ||||||||||||||||
| Date | 2017-10-20 22:23 | |||||||||||||||
| From | Albert Graef | |||||||||||||||
| Subject | Re: [Csnd] offline fft | |||||||||||||||
Very useful, thanks. But is there a way to grab the data from the pvx file in textual format so that it can be plotted, e.g., in gnuplot? TIA,On Fri, Oct 20, 2017 at 12:15 AM, Iain McCurdy <i_mccurdy@hotmail.com> wrote:
-- Dr. Albert Gr"af Computer Music Research Group, JGU Mainz, Germany Email: aggraef@gmail.com WWW: https://plus.google.com/+AlbertGraef | ||||||||||||||||