Question

我正在尝试编译我在互联网上找到的Vibrato音效代码。代码有一个函数调用wavread，在这个函数中matlab显示错误，我搜索其他代码来执行此操作，每个代码都使用此函数打开de wav文件，有人发生了什么？以下代码：

Vibrato脚本：

clear all;
close all;
clc;

infile = 'musica.wav';

% read in wav sample
[ x, Fs, N ] = wavread(infile);


%set Parameters for vibrato
% Change these to experiment with vibrato

Modfreq = 10; %10 Khz
Width = 0.0008; % 0.8 Milliseconds

% Do vibrato

yvib = vibrato(x, Fs, Modfreq, Width);

% write output wav files
wavwrite(yvib, Fs,  'out_vibrato.wav');

% plot the original and equalised waveforms

figure(1)
hold on
plot(x(1:500),'r');
plot(yvib(1:500),'b');
title('Vibrato First 500 Samples');

颤音功能：

% Vibrato 
function y=vibrato(x,SAMPLERATE,Modfreq,Width)
ya_alt=0;
Delay=Width; % basic delay of input sample in sec
DELAY=round(Delay*SAMPLERATE); % basic delay in # samples
WIDTH=round(Width*SAMPLERATE); % modulation width in # samples
if WIDTH>DELAY 
  error('delay greater than basic delay !!!');
  return;
end
MODFREQ=Modfreq/SAMPLERATE; % modulation frequency in # samples
LEN=length(x);        % # of samples in WAV-file
L=2+DELAY+WIDTH*2;    % length of the entire delay  
Delayline=zeros(L,1); % memory allocation for delay
y=zeros(size(x));     % memory allocation for output vector

for n=1:(LEN-1)
   M=MODFREQ;
   MOD=sin(M*2*pi*n);
   ZEIGER=1+DELAY+WIDTH*MOD;
   i=floor(ZEIGER);
   frac=ZEIGER-i;
   Delayline=[x(n);Delayline(1:L-1)]; 
   %---Linear Interpolation-----------------------------
   y(n,1)=Delayline(i+1)*frac+Delayline(i)*(1-frac); 

   %---Allpass Interpolation------------------------------
   %y(n,1)=(Delayline(i+1)+(1-frac)*Delayline(i)-(1-frac)*ya_alt);  
   %ya_alt=ya(n,1);
end

出现的错误：

Undefined function or variable 'wavread'。

在行中：

[ x, Fs, N ] = wavread(infile);

Answer 1

从Matlab R2015b开始，函数wavread是not supported。

此功能已被audioread取代，并且原型略有更改。

请将故障线替换为

% read in wav sample
[x, Fs] = audioread(infile);

然后，wavwrite的情况与之前的audiowrite相同。

您应该将其更改为

% write output wav files
audiowrite('out_vibrato.wav', yvib, Fs);

颤音函数matlab中的wavread错误

1 个答案: