create a chorus-effect

I've been trying to create a chorus effect in matlab. But there's something that doesn't work. I want to use this: y(n)=a*x(n) + b(x(n-t))

t= t0 + Asin(2*pi*f*n)

t0 is the delay

This is my attempt:

[x,fs]=wavread('filename.wav');
f=0.25;
delay_in_sampels=0.05*fs;%50 ms delay
index=1:length(x);
sincurve = 1*sin(2*pi*index*f);
y = zeros(length(x):1);
y(1:delay_in_sampels)=x(1:delay_in_sampels);
a=1;
b=5;

for i =(delay_in_sampels+1):length(x)
    sink=abs(sincurve(i));
    delay=(delay_in_sampels+sink);

      o=ceil(i-delay);
      y(i)=(a*x(i)) + b*(x(o)); 
  end
  soundsc(y,fs)

What's wrong? cause it doesn't sound like a chorus effect imo.

[MatlabPro]

have you tried adding more delay?

[Erik]

well ye, it sounds, then, like an echo. But if you look at my code, do you see anything that might be wrong? or does it seem to be right?

[Aravinth Ananth]

can anyone tell the solution for this corus effect please....

[Vincent Abraham]

Were you able to resolve this error ?

Answer 1

[Aravinth Ananth]

hello cany any one give a correct code for chorus effect in math lab please?