matlab怎么提取音频

﹏便是晴天ヾ

matlab怎么提取音频

陌上，烟雨遥

madio

使用wavread
3 \/ i% [" f$ F) u( e! ACreate 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
$ |+ O3 T) c0 ^1 p) o. A9 g
/ }" N* E5 x; uhfile = 'handel.wav';
wavwrite(y, Fs, hfile)
clear y Fs
( V7 O' k7 K. c
- r4 }( W) R' ]4 d7 w/ x% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
sound(y, Fs);
( v) L/ q5 R( C. G
% Pause before next read and playback operation.
3 v8 R4 F3 K: j; O) N/ z; [7 fduration = numel(y) / Fs;
pause(duration + 2)
1 I" m' j; p# E) Z$ x' ?1 W
& {: Q5 a* L5 ?0 ?4 y: X4 z% Read and play only the first 2 seconds.
; f, X4 }) g. c' znsamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
% S/ k$ t% t7 [' ^0 Isound(y2, Fs);
& K4 c0 C  H5 ~pause(4)
" I. D" z7 W2 D
% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');

tot_samples = sizeinfo(1);
startpos = tot_samples / 3;
3 [8 U- u8 @( F2 f1 [endpos = 2 * startpos;

, ^) f6 ]: z  P% k7 y: u[y3, Fs] = wavread(hfile, [startpos endpos]);
sound(y3, Fs);