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,
! [) L: M- b+ M0 k# Pand read portions of the file back into MATLAB.% Create WAV file in current folder.
load handel.mat
5 M' _0 z7 U: G, J" ]1 b; k
hfile = 'handel.wav';
wavwrite(y, Fs, hfile)
, H# R2 t9 k+ M2 H9 xclear y Fs

% Read the data back into MATLAB, and listen to audio.
4 n2 ?3 q  |) t6 l& Y) m9 h[y, Fs, nbits, readinfo] = wavread(hfile);
% D0 Z% s6 f% J. G* `sound(y, Fs);

7 h8 J; t) y# n. N% Pause before next read and playback operation.
duration = numel(y) / Fs;
4 E9 x1 G. I+ b/ dpause(duration + 2)
, y$ u: d3 I1 i- U
3 \- u0 n6 R& n) `( F  G+ P% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
5 J9 _+ L  p  |# n4 v: Q[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
8 Y  O$ w# \, q' \& e- `( A5 |8 rpause(4)

: R$ q  V) d' {) ]0 ?% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');

9 T9 A1 x+ d. \5 htot_samples = sizeinfo(1);
startpos = tot_samples / 3;
% r: D9 K, C9 kendpos = 2 * startpos;
# I7 b5 E& m8 M$ ~9 h. P1 P
7 ]2 d, i$ P5 e7 {6 {[y3, Fs] = wavread(hfile, [startpos endpos]);
/ m" I6 v8 u! D- }: psound(y3, Fs);

陌上，烟雨遥