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fft - FFTW audio artifacts when modifying magnitudes in ...
https://dsp.stackexchange.com/questions/70287/fftw-audio-artifacts-when-modifying-magnitudes-in-frequency-domain
Signal Processing Stack Exchange is a question and answer site for practitioners of the art and science of signal, image and video processing. It only takes a minute to sign up. ... FFTW audio artifacts when modifying magnitudes in frequency domain. Ask Question Asked 1 year, 4 months ago. Active 1 year, 4 months ago.
c - Convolution Using FFTW3 and PortAudio - Stack …
https://stackoverflow.com/questions/28989631/convolution-using-fftw3-and-portaudio
The overall process is as follows: Audio signal buffer x has length lenX. Impulse response buffer h has length lenH. Convolved signal has length nOut = lenX + lenH - 1. Frequency domain complex buffers X and H each have length nOut. Create and execute two separate real-to-complex plans (one each for x -> X and h -> H ), each of length nOut.
FFTW Home Page
An audio interview of the FFTW authors is available from the RCE podcast program. Downloading Versions 3.3.10 and 2.1.5 of FFTW may be downloaded from this site. Feel free to post FFTW on your own site, but be sure to tell us so that we can link to your page and notify you of updates to the software. Literature. BibTeX file of FFTW references.
FFT Links - FFTW Home Page
http://www.fftw.org/links.html
The Scientist's and Engineer's Guide to Digital Signal Processing is an entire DSP book free online by Steven W. Smith. Another book online: Mathematics of the Discrete Fourier Transform (DFT)—With Music and Audio Applications, by Julius O. Smith III.
Short Time Fourier Transform with FFTW3 - DSP
https://ofdsp.blogspot.com/2011/08/short-time-fourier-transform-with-fftw3.html
The basic process is as follows: 1) Slice out a chunk of the signal. 2) 'window' the chunk*. 3) Compute the DFT/FFT of the chunk. 4) Store the DFT/FFT output somewhere. 5) Slice the next chunk out of the signal**. 6) Keep repeating until you hit the end of the signal.
Audio FFT Filter, noisy clicks
https://www.dsprelated.com/thread/4255/audio-fft-filter-noisy-clicks
Audio FFT Filter, noisy clicks. Well, not a filter exactly, just an FFT in-out test. - The sound output is crackly and with regular clicks, rather loud. Louder than one would expect from just fp precision noise errors. - Tried again using the double precision version of fftw, same results. - Tried again at N=512 an even 256 to check if it was a ...
Comparison of FFT Implementations for .NET - CodeProject
https://www.codeproject.com/articles/1095473/comparison-of-fft-implementations-for-net
FFTW is a popular, native FFT implementation. It is probably the fastest open source implementation one can find on the internet, so comparison with the managed code is a bit unfair. ... (audio processing). The following interface is used for all tests. If you have your own FFT implementation, ... The generated signal is a simple sine wave with ...
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