How to extract semi-precise frequencies from a WAV file using Fourier Transforms

Posted by Seisatsu on Stack Overflow See other posts from Stack Overflow or by Seisatsu
Published on 2010-05-21T11:25:30Z Indexed on 2010/05/21 16:20 UTC
Read the original article Hit count: 342

Filed under:

Let us say that I have a WAV file. In this file, is a series of sine tones at precise 1 second intervals. I want to use the FFTW library to extract these tones in sequence. Is this particularly hard to do? How would I go about this?

Also, what is the bast way to write tones of this kind into a WAV file? I assume I would only need a simple audio library for the output.

My language of choice is C

Related posts about fftw

fftw in Visual Studio?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to link my project with fftw and so far, I've gotten it to compile, but not link. As the site said, I generated all the .lib files (even though I'm only using double precision), and copied them to C:\Program Files\Microsoft Visual Studio 9.0\VC\lib, the .h file to C:\Program Files\Microsoft… >>> More
How to extract frequency information from samples from PortAudio using FFTW in C

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi all, I want to make a program that would record audio data using PortAudio (I have this part done) and then display the frequency information of that recorded audio (for now, I'd like to display the average frequency of each of the group of samples as they come in). From some research I've done… >>> More
How do I get a .so file from a .la file?

as seen on Stack Overflow - Search for 'Stack Overflow'
FFTW 2.x builds a .la file (under fftw/.libs directory). I think I need a .so file to link to. (I am not sure, because I am a gcc newbie). >>> More
How to extract semi-precise frequencies from a WAV file using Fourier Transforms

as seen on Stack Overflow - Search for 'Stack Overflow'
Let us say that I have a WAV file. In this file, is a series of sine tones at precise 1 second intervals. I want to use the FFTW library to extract these tones in sequence. Is this particularly hard to do? How would I go about this? Also, what is the bast way to write tones of this kind into a WAV… >>> More
Confusion testing fftw3 - poisson equation 2d test

as seen on Stack Overflow - Search for 'Stack Overflow'
I am having trouble explaining/understanding the following phenomenon: To test fftw3 i am using the 2d poisson test case: laplacian(f(x,y)) = - g(x,y) with periodic boundary conditions. After applying the fourier transform to the equation we obtain : F(kx,ky) = G(kx,ky) /(kx² + ky²) (1) if… >>> More

Developer IT

How to extract semi-precise frequencies from a WAV file using Fourier Transforms - Developer IT

How to extract semi-precise frequencies from a WAV file using Fourier Transforms

c

fftw

wav

audio

Related posts about c

Related posts about fftw

fftw in Visual Studio?

How to extract frequency information from samples from PortAudio using FFTW in C

How do I get a .so file from a .la file?

How to extract semi-precise frequencies from a WAV file using Fourier Transforms

Confusion testing fftw3 - poisson equation 2d test

Categories cloud