matlab怎么提取音频

﹏便是晴天ヾ

matlab怎么提取音频

madio

使用wavread
Create a WAV file from the example file handel.mat,
and read portions of the file back into MATLAB.% Create WAV file in current folder.
load handel.mat

hfile = 'handel.wav';
7 Q3 a) G2 b4 u8 Q5 w. d. xwavwrite(y, Fs, hfile)
clear y Fs

+ g. Y4 b$ n2 x3 ^9 S% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
sound(y, Fs);

- Y8 a) r4 ^9 d5 R% Pause before next read and playback operation.
& K' C: R2 H* b, Q$ cduration = numel(y) / Fs;
% i. c1 b# Z" \9 h% a. r$ mpause(duration + 2)

% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
3 D. ~# o0 f3 j8 v9 b. A: f[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
pause(4)

7 b& X& @. [6 K8 d3 m# A% Read and play the middle third of the file.
) C+ z, P! `' J; x3 o, w! N) ?+ ysizeinfo = wavread(hfile, 'size');
2 M( r8 _+ Z8 Y
tot_samples = sizeinfo(1);
startpos = tot_samples / 3;
endpos = 2 * startpos;
2 v4 Q7 W. L4 J' p
[y3, Fs] = wavread(hfile, [startpos endpos]);
6 e5 `+ @7 J' {  Nsound(y3, Fs);

陌上，烟雨遥