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发表于 2013-11-7 10:11
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使用wavread
" I2 }% T( H8 t+ Y; ?/ f: G$ vCreate a WAV file from the example file handel.mat,
" ~7 |" {& d/ D9 S) ~% r. X3 Land read portions of the file back into MATLAB.% Create WAV file in current folder.
# |- p$ }4 t% h" F! lload handel.mat
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9 Q7 P9 x [; T1 p* @! ahfile = 'handel.wav'; N2 r' B/ K4 T6 @% n5 f0 d7 X
wavwrite(y, Fs, hfile)9 B/ S9 X _& e" j( F- e
clear y Fs
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% Read the data back into MATLAB, and listen to audio.2 `' d2 D9 ^6 X8 O" A1 t c
[y, Fs, nbits, readinfo] = wavread(hfile);
# L( Z( M) p3 wsound(y, Fs);. a' F; C1 i1 y2 i& n7 L) I' v
$ x2 B) {# Z6 F X1 S( Y4 Y7 x% Pause before next read and playback operation.
: [) g3 w0 D( |" u3 c. z; N, F' Qduration = numel(y) / Fs;
- D5 C0 K. [5 r- C1 O5 B0 k$ zpause(duration + 2)
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[& b* `/ n; V; A0 J2 y" u$ G% Read and play only the first 2 seconds.
$ J5 S+ `- Z" N' E4 g1 V- ?' nnsamples = 2 * Fs;3 P3 B* K. ~9 Y0 H0 r$ \3 Q& Q
[y2, Fs] = wavread(hfile, nsamples);
# }7 Q0 j7 z* u3 k+ {sound(y2, Fs);" s9 O3 @0 j+ X1 E% R
pause(4)9 A' q5 _8 c i' k8 m" P
/ K ?% u! o7 Y4 ^; j( @& o7 R7 S% Read and play the middle third of the file.
* t5 i- t5 g; d5 f, Vsizeinfo = wavread(hfile, 'size');
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tot_samples = sizeinfo(1);
$ k+ I3 C( Y9 S& Fstartpos = tot_samples / 3;
- y' I' R5 Z+ ?8 a, t1 tendpos = 2 * startpos;
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[y3, Fs] = wavread(hfile, [startpos endpos]);
) ] y: g, c; g. _& n6 `( B" Gsound(y3, Fs); |
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发表于 2013-11-6 21:05
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