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发表于 2013-11-7 10:11
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使用wavread: X& M! ?# ^4 u, X) p+ t0 e3 ?* U( ]
Create a WAV file from the example file handel.mat,
; Y( D2 @# c" _7 Band read portions of the file back into MATLAB.% Create WAV file in current folder.! U# l$ e8 v' H0 m9 b
load handel.mat E+ Q" X2 p& E1 U9 v7 S' q4 S
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hfile = 'handel.wav';
2 v6 J8 {' E. c, Awavwrite(y, Fs, hfile) D" f2 a+ q5 P: p" y n9 {
clear y Fs( {2 Y) E! v6 y: ^: X! d
! a; d! I6 r( I8 v4 V$ n/ ?7 Y4 t% Read the data back into MATLAB, and listen to audio.
3 _5 s. ]: I' V2 ~3 ?[y, Fs, nbits, readinfo] = wavread(hfile);& ?* O' x9 I/ K6 c- S4 C
sound(y, Fs);4 G, C i( T- \8 l3 r# P) M
5 n; A3 R/ b" W% I1 t# ?% Pause before next read and playback operation.3 W5 ]. X) S) q
duration = numel(y) / Fs;
/ G; P! n& a O- X1 \" I' qpause(duration + 2)6 s1 l( y' o) Y) X
* ]. ]- S6 E5 E% Read and play only the first 2 seconds.: K: t( t, O2 |7 Q. j, F
nsamples = 2 * Fs;9 ?% i4 v$ S4 Z/ E4 `; ?& ~ F0 t
[y2, Fs] = wavread(hfile, nsamples);
% d3 T# d3 c, {# l6 `7 dsound(y2, Fs);
- O4 V/ W2 m- y! T9 Ypause(4)% n. d' M8 L: v, W# \0 W& G
8 R/ w. \9 v- U" l4 J0 O% W% Read and play the middle third of the file.
+ ?- L6 G9 b9 p! A8 B3 c4 Gsizeinfo = wavread(hfile, 'size');, s: k5 P4 H+ m# d! Y' n/ {
% G$ j) t1 Y$ U5 H2 o( a. I0 Itot_samples = sizeinfo(1);
* V" y2 q, C2 I$ ?startpos = tot_samples / 3;* B0 x% O1 y; _
endpos = 2 * startpos;) U1 W& X1 L o# i7 @" _
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[y3, Fs] = wavread(hfile, [startpos endpos]);
1 h8 i4 }% X |1 @0 `sound(y3, Fs); |
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