matlab怎么提取音频

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matlab怎么提取音频

madio

使用wavread
% j0 c8 G7 V4 A: A4 _& Y* f' I8 XCreate a WAV file from the example file handel.mat,
and read portions of the file back into MATLAB.% Create WAV file in current folder.
3 c  ^" n  c6 W+ T1 e& u( @load handel.mat

hfile = 'handel.wav';
) B( z! S8 D( Pwavwrite(y, Fs, hfile)
6 R+ P' i4 u/ u( t0 [clear y Fs

$ p% S/ d7 K+ n, i) ]% Read the data back into MATLAB, and listen to audio.
' Q1 s/ Y; c5 ?; |[y, Fs, nbits, readinfo] = wavread(hfile);
5 H% G" u! \* F& a5 esound(y, Fs);
5 M8 B& O5 X& k# u) ]4 A0 c2 y
% Pause before next read and playback operation.
duration = numel(y) / Fs;
pause(duration + 2)
% A* V) v! K; A2 b+ n
% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
# D  A/ j& x$ u; I- R: I[y2, Fs] = wavread(hfile, nsamples);
" @% ~5 u' i' x  \0 }sound(y2, Fs);
% V# Y  o# l: H0 B0 Tpause(4)

% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');

tot_samples = sizeinfo(1);
startpos = tot_samples / 3;
8 b( T$ o; r7 qendpos = 2 * startpos;

3 g( W1 U% ]! y: G2 q[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);

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