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,
& P& s/ ]! ]7 H% M9 Uand read portions of the file back into MATLAB.% Create WAV file in current folder.
+ V7 B' q5 G1 X" Pload handel.mat
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hfile = 'handel.wav';
3 [4 y* A( ]0 Swavwrite(y, Fs, hfile)
) @1 v$ _) v) s) j- Wclear y Fs
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. O6 M7 e9 |  s0 r6 W+ T% Read the data back into MATLAB, and listen to audio.
5 ]! R# {. q! r. c; v- K[y, Fs, nbits, readinfo] = wavread(hfile);
( M: ]0 I: q: [& N. @7 J, h* S7 P* Bsound(y, Fs);
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4 C- v6 }  z0 i$ c% Pause before next read and playback operation.
4 G; e9 `, }$ v- x4 rduration = numel(y) / Fs;
pause(duration + 2)

% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
pause(4)

/ D  M8 e7 _& F2 t7 P( t% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');
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tot_samples = sizeinfo(1);
0 ]$ Y8 [' q4 V5 N: s( e3 dstartpos = tot_samples / 3;
, Z) e5 p- ], f! }; N4 L# ?endpos = 2 * startpos;
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1 Y2 f' a+ j$ b[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);

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