matlab怎么提取音频

﹏便是晴天ヾ

matlab怎么提取音频

madio

使用wavread
+ m& }5 G' e0 B& L" M; ZCreate a WAV file from the example file handel.mat,
3 w2 m. Q2 k& _! q2 Yand read portions of the file back into MATLAB.% Create WAV file in current folder.
- \2 T' }  ]+ dload handel.mat

* y: t8 r- b' R) j& q' ]hfile = 'handel.wav';
1 _, M# W$ u5 _9 twavwrite(y, Fs, hfile)
clear y Fs

% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
/ B; y! Z# _) c, jsound(y, Fs);

+ X- n. M& v! y  X) ?% Pause before next read and playback operation.
$ C* U: S2 V: k0 Jduration = numel(y) / Fs;
pause(duration + 2)
. P+ c  [" o2 x* {2 o
% Read and play only the first 2 seconds.
& i: u! M0 C* S& p6 C1 g  nnsamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
pause(4)

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

1 n3 z# ~- [- V/ ptot_samples = sizeinfo(1);
startpos = tot_samples / 3;
endpos = 2 * startpos;
: H. B8 M! j5 O" r" f% y( c2 }7 N
[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);

陌上，烟雨遥