matlab怎么提取音频

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matlab怎么提取音频

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使用wavread
Create a WAV file from the example file handel.mat,
. E3 d) m! L+ w$ B6 @3 Yand read portions of the file back into MATLAB.% Create WAV file in current folder.
load handel.mat
0 X; \; N$ v9 i3 a
3 E8 N8 J6 `6 x, Dhfile = 'handel.wav';
wavwrite(y, Fs, hfile)
clear y Fs
! h: {  |6 G# `1 s% {6 R( ]; x
% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
sound(y, Fs);
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% Pause before next read and playback operation.
duration = numel(y) / Fs;
" q1 C  v6 y: e( e  ?/ bpause(duration + 2)

% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
3 t, g( B% P7 k- N  Z( _4 K7 U8 |" kpause(4)

% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');

tot_samples = sizeinfo(1);
startpos = tot_samples / 3;
endpos = 2 * startpos;
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" T3 h  h- ~1 _# H4 @) @[y3, Fs] = wavread(hfile, [startpos endpos]);
; D$ j" T# L/ W, C: h5 v" Nsound(y3, Fs);

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