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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
2020-9-12 · I'm currently working with FFT (FFTW3) that I'm using to apply treatments on audio files frequencies. The Forward/Backward test is passed, since I can get the exact same soundfile when processing IFFT. So I assume my implementation is clean. The thing for which I'm not an expert is to treat data then.
Audio FFT Filter, noisy clicks - dsprelated.com
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 ...
FFTW Home Page
2021-9-15 · 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.
c++ - Filtering hit-hat beat from an audio with FFT ...
https://stackoverflow.com/questions/65110174/filtering-hit-hat-beat-from-an-audio-with-fft
· What you do now is you filter frequencies in an audible range, but you should filter then in an inaudible range, where the beat range lines. I.e. not "give me frequencies less than 300 Hz (less than 300 cycles per second)", but "filter the frequencies between 40 cycles per minute to, say, 200 cycles per minute , which is from 0.6 Hz to 3.3 Hz ...
FFTW - Tutorial
http://fftw.org/fftw2_doc/fftw_2.html
2003-11-26 · fftw_export_wisdom_to_file writes the wisdom to output_file, which must be a file open for writing. fftw_import_wisdom_from_file reads the wisdom from input_file, which must be a file open for reading, and returns FFTW_SUCCESS if successful and FFTW_FAILURE otherwise. In both cases, the file is left open and must be closed by the caller.
FFTW3学习笔记2：FFTW（快速傅里叶变换）中文参考 - 爱国 ...
https://www.cnblogs.com/aiguona/p/9407425.html
2018-8-2 · FFTW3学习笔记2：FFTW（快速傅里叶变换）中文参考. 据说 FFTW （Fastest Fourier Transform in the West）是世界上最快的FFT。. 为了详细了解FFTW以及为编程方便，特将 用户手册 看了一下，并结合手册制作了以下FFTW中文参考。. 其中大部分是原文重点内容的翻译，并加入 …
C++中调用FFTW - 知乎
https://zhuanlan.zhihu.com/p/44482186
2018-9-13 · FFTW是一个可以进行可变长度一维或多维DFT的开源C程序库，是目前最快的FFT算法实现。本文简述了在Windows平台上，如何在C++中调用FFTW，所使用 …
FFTW Frequently Asked Questions with Answers
2014-3-16 · Q5.2. The MPI transforms in FFTW 1.2 give incorrect results/leak memory. Q5.3. The test programs in FFTW 1.2.1 fail when I change FFTW to use single precision. Q5.4. The test program in FFTW 1.2.1 fails for n > 46340. Q5.5. The threaded code fails on Linux Redhat 5.0; Q5.6. FFTW 2.0's rfftwnd fails for rank > 1 transforms with a final dimension ...
FFTW的使用_cyh706510441的专栏-CSDN博客_fftw使用
https://blog.csdn.net/cyh706510441/article/details/46676123
2015-6-29 · fftw是MIT开源的一个快速傅里叶变换库，用C写成。但本次对源码的分析是在2.15版本上进行的，原因是最新的版本为了提升效率增加了很大的复杂性。但fftw库的主要代码结构可以通过之前的版本很好的表达出来
Comparison of FFT Implementations for .NET - CodeProject
https://www.codeproject.com/articles/1095473/comparison-of-fft-implementations-for-net
2016-5-15 · 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. ... Here are the results of calculating the 4096-point FFT of a set of lowpass FIR filter ...
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