fft

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Find audio sample in audio file (spectrogram already exists)

I am trying to achieve the following: Using Skype, call my mailbox (works) Enter password and tell the mailbox that I want to record a new welcome message (works)[详细]

2023-03-02 13:22 分类：问答
FFT/Guitar Tuner on iOS [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.[详细]

2023-03-02 11:52 分类：问答
Get iPhone mp3 frequency from AvassetReader and vDSP_FFT

I\'m trying to get frequency from iPhone / iPod music library for a spectrum app on iPod library, helping myself with reading-audio-samples-via-avassetreader to get audio samples and then with using-t[详细]

2023-03-02 10:45 分类：问答
HOW to get MFCC from an FFT on a signal?

SHORT AND SIMPLE: What are the steps that are involved to get an MFCC from an FFT. DETAILED: I\'m working on a drum application to classify sounds. Its a matching application for the iPhone with the o[详细]

2023-03-02 04:55 分类：问答
computing fft and ifft with fftw.h in C

Hi all I am using the fftw C libraries to compute the frequency spectrum for some signal processing applications on embedded systems. However, in my project I have run into a slight hinderence.[详细]

2023-03-01 12:32 分类：问答
Android audio FFT to retrieve specific frequency magnitude using audiorecord

I am currently trying to implement some code using Android to detect when a number of specific audio frequency ranges are played through the phone\'s microphone. I have set up the class using the Audi[详细]

2023-02-28 17:03 分类：问答
Convolution with FFT, how does this work?

I know that in time domain convolution is a pretty expensive operation between two matrices and you can perform it in frequency domain by transforming them in the complex plane and use multiplication[详细]

2023-02-27 12:31 分类：问答
Calculating the DFT with Jtransform's DoubleFFT_1D() for android

I have been searching everywhere to find a reliable method to calculate the FFT of an audio byte stream received by a native function in android SDK (through eclips开发者_StackOverflow社区e IDE). I ha[详细]

2023-02-27 08:21 分类：问答
converting matlab FFT to CUDA FFT

I am currently using the following matlab function: function out = fft_2d(in) out = fftshift(fft2(ifftshift(in)));[详细]

2023-02-26 21:10 分类：问答
What is wrong with this fourier transform implementation

I\'m trying to implement a discrete fourier transform, but it\'s not working. I\'m prob开发者_JS百科ably have written a bug somewhere, but I haven\'t found it yet.[详细]

2023-02-26 15:43 分类：问答