matlab怎么提取音频

﹏便是晴天ヾ

matlab怎么提取音频

madio

使用wavread
3 g1 C  q" y  C0 |# S# _Create a WAV file from the example file handel.mat,
" \" G$ k) V* U+ m' \# O  k4 q* vand read portions of the file back into MATLAB.% Create WAV file in current folder.
& D% |1 P8 C! ?4 B9 X" F- Y5 Hload handel.mat
  S4 ]$ z4 J" t# S! z; E: v( U, G" k
hfile = 'handel.wav';
wavwrite(y, Fs, hfile)
clear y Fs
- s$ s1 v# B- }! H5 {2 V
% Read the data back into MATLAB, and listen to audio.
[y, Fs, nbits, readinfo] = wavread(hfile);
sound(y, Fs);
+ r( I( K; M5 Q6 A
% Pause before next read and playback operation.
7 R4 N+ j0 n* s" R! q& f# A" pduration = numel(y) / Fs;
+ d& _- ]' |" [8 h6 X7 g. kpause(duration + 2)
1 {- f2 ]' ^& k
9 O2 N3 P2 b# ]1 P% Read and play only the first 2 seconds.
nsamples = 2 * Fs;
[y2, Fs] = wavread(hfile, nsamples);
sound(y2, Fs);
4 y3 @) d. Z) wpause(4)
( r8 u2 P( K5 e! w( p
% Read and play the middle third of the file.
sizeinfo = wavread(hfile, 'size');

  X+ Q+ m& q5 {* h( n7 I  e+ b, utot_samples = sizeinfo(1);
startpos = tot_samples / 3;
0 g$ _. r0 E* x7 O, M& t: ^endpos = 2 * startpos;
- W9 R5 h/ k6 }0 L$ O
[y3, Fs] = wavread(hfile, [startpos endpos]);
! G6 ~5 G- C# P  j7 Rsound(y3, Fs);

陌上，烟雨遥