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发表于 2013-11-7 10:11
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使用wavread
* p" z: @; f1 `- G- _7 p4 QCreate a WAV file from the example file handel.mat,
% a2 ~/ ], |2 L2 sand read portions of the file back into MATLAB.% Create WAV file in current folder.8 J- ]) w" b( P$ a$ Z+ ]
load handel.mat
; i0 ^" m2 e& T4 S
4 o" M; @' a& [% f/ Zhfile = 'handel.wav';' K4 W' N3 C. j" F+ \
wavwrite(y, Fs, hfile): c+ H: u* H1 e5 N: \6 F
clear y Fs) U8 A* r1 D) `& e3 i1 S
2 x7 a- {" ^! z5 u. E% Read the data back into MATLAB, and listen to audio.( o8 u; ?( ]& b0 [' g! f
[y, Fs, nbits, readinfo] = wavread(hfile);! h8 \1 G* _: A6 c7 S$ f
sound(y, Fs);# w5 n+ I# R: w! j. \
/ B q2 l. ^/ O# \& ~. G! k% Pause before next read and playback operation.
* v, W9 j& K( ? Zduration = numel(y) / Fs;
* {. R* O& z; N9 ]# H9 F0 Rpause(duration + 2)4 t: {, H3 r, B" }
- w' w5 V- O- s, H, o% Read and play only the first 2 seconds.' X* r9 m" X+ S F4 w2 ]' `) g
nsamples = 2 * Fs;- J3 I" S0 s$ R4 S- p6 b
[y2, Fs] = wavread(hfile, nsamples);1 P/ _# E7 a, x5 b
sound(y2, Fs);9 O$ c- i* M' V9 Y8 Q+ X% \
pause(4)
% d0 Z6 w9 o; v) o; ^ / B" F, G$ r0 `% i5 n! l+ ]
% Read and play the middle third of the file./ j( m) y* B+ d2 s. ]
sizeinfo = wavread(hfile, 'size');3 R6 U6 g1 G) T; R' U, N3 {' X
, @3 F! u( _8 Vtot_samples = sizeinfo(1);0 k6 l( Q' P, ^4 H2 F. t2 F' D* n
startpos = tot_samples / 3;# y. _+ L7 o9 ?- Y4 C
endpos = 2 * startpos;4 c4 H: I' ^8 F% m9 h0 ]
3 a& Y: v9 _) G/ n4 `- R( v" ]
[y3, Fs] = wavread(hfile, [startpos endpos]);
* U# z& ~" D# e0 ]8 F2 w& y8 Fsound(y3, Fs); |
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发表于 2013-11-6 21:05
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