matlab怎么提取音频

﹏便是晴天ヾ

matlab怎么提取音频

陌上，烟雨遥

madio

使用wavread
Create a WAV file from the example file handel.mat,
# B) j/ a' @. h$ Zand read portions of the file back into MATLAB.% Create WAV file in current folder.
load handel.mat
* M! R) F3 m- {9 {. B/ b
hfile = 'handel.wav';
1 b0 @2 A5 b+ m0 H9 V/ H- }( |wavwrite(y, Fs, hfile)
clear y Fs

% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
5 f! ^5 q4 q  e- wsound(y, Fs);

$ {/ ^4 L% w% v1 U% Pause before next read and playback operation.
) d( y" u6 ^/ ]duration = numel(y) / Fs;
0 t3 t3 K; L+ {/ q: tpause(duration + 2)

% Read and play only the first 2 seconds.
8 E7 q6 J4 |' Z; b' insamples = 2 * Fs;
0 }6 ^. T( `& t7 |. u+ r[y2, Fs] = wavread(hfile, nsamples);
6 t# o/ U# Q2 isound(y2, Fs);
pause(4)
9 a) z( R+ E* G; |
% Read and play the middle third of the file.
1 I0 R, K$ ]* O& [! G& d$ v7 Csizeinfo = wavread(hfile, 'size');

tot_samples = sizeinfo(1);
startpos = tot_samples / 3;
endpos = 2 * startpos;
4 a9 P. a% E1 x% @2 }
[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);