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,
2 l4 k2 |9 h* `6 d' c9 t. mand read portions of the file back into MATLAB.% Create WAV file in current folder.
) x6 z; l3 I. ]/ Vload handel.mat

hfile = 'handel.wav';
. T5 u: c& N0 [% \wavwrite(y, Fs, hfile)
clear y Fs

% Read the data back into MATLAB, and listen to audio.
9 P% x0 A' N& R* V1 {- K[y, Fs, nbits, readinfo] = wavread(hfile);
1 Z+ j. [2 E3 V+ xsound(y, Fs);

# W$ g$ k( W! f7 ]& E0 Z% Pause before next read and playback operation.
# n( @0 n3 M2 U% S" B0 tduration = numel(y) / Fs;
% q* R4 Q0 q" }" n4 kpause(duration + 2)
* q, |$ H* x  ~  F, E& Z
; W' W4 C+ z) S7 @% Read and play only the first 2 seconds.
7 d0 q# C" q5 I, w9 Ansamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
' |! d% }) C" U7 O8 u' I( t( K2 ?: i1 L- ypause(4)
2 m. P% y' W* Q
) j  w3 h* u2 j6 d' N) g, i- k: s% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');

tot_samples = sizeinfo(1);
0 l8 D8 H; q& t: O: @2 e( d9 u9 ustartpos = tot_samples / 3;
4 t, z. v) ~) v; E, i7 Cendpos = 2 * startpos;
. y* S4 k7 t5 u9 e
( y6 [4 r" s! T[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);

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