matlab怎么提取音频

﹏便是晴天ヾ

matlab怎么提取音频

madio

使用wavread
& o2 m+ ]" r( S& s/ k! b+ ?: ECreate a WAV file from the example file handel.mat,
: N, _2 q9 ^2 g/ |) Wand read portions of the file back into MATLAB.% Create WAV file in current folder.
load handel.mat

$ \3 q7 [9 j# Khfile = 'handel.wav';
wavwrite(y, Fs, hfile)
* R/ G. U- C. {clear y Fs
- ~9 d; j# W. ^) J* v5 ^4 m+ }* i
% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
sound(y, Fs);

% Pause before next read and playback operation.
( n- M3 b1 B  l* p+ p' cduration = numel(y) / Fs;
1 w# ?4 h2 e/ R' ypause(duration + 2)
' }2 |# J& B8 c$ ~$ {+ s% `
% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
pause(4)

; m+ l. Y3 g- U# n9 u% Read and play the middle third of the file.
( G6 D8 x- {2 ^2 l$ `$ C. {sizeinfo = wavread(hfile, 'size');
+ c+ y8 P) c! Y
tot_samples = sizeinfo(1);
startpos = tot_samples / 3;
endpos = 2 * startpos;

9 D( R1 j: c. V, p[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);

陌上，烟雨遥