Coding noise cancellation in matlab

%This is a program I found online. It's supposed to take an audio file from the folder, add noise and then filter it out. However, ha=dsp.LMSFilter(256,mu); is wrong and how to add the correct arguments to dsp.LMSFilter(), I have no idea. Alos, I don't understand the working of the code. Any help would be appreciated. This is a part of a very important and graded project in my college.

load handel.mat;
d= 'Recording.m4a';
samples = [1,20*Fs];
clear d Fs
[d,Fs] = audioread('Recording.m4a',samples);
sound(d,Fs)
pause(3)
x=awgn(d,20);
sound(x,Fs) 
pause(3)
mu=0.017;%stepsize
ha=dsp.LMSFilter(256,mu); 
[y,e]=filter(ha,x(:,1),d(:,1));
sound(y,Fs)
subplot(4,1,1),plot(d)
grid on
xlabel('iterations')
ylabel('amplitude')
title('original voice signal')
subplot(4,1,2)
plot(x)
grid on
xlabel('iterations')
ylabel('amplitude')
title('signal with AWGN')
subplot(4,1,3)
plot(y)
grid on
title('filtered output')
xlabel('iterations')
ylabel('amplitude')
subplot(4,1,4)
plot(e)
grid on
title('error signal')
xlabel('iterations')
ylabel('amplitude')

[darova]

You didn't attach the data

[Archit Srivastav]

Hi, Thanks for responding. I'm sorry but I don't understand what you mean..what data do I need to attach?

[darova]

[Archit Srivastav]

Thank you for pointing that out. However, I still don't understand. What exactly is missing? Do I need to add parameters to it?

The code runs so far and the audio signal is read. The audio signal is heard and then the audio signal+the added noise. After this, it stops and gives an error in dsp.LMSFilter() saying that more parameters have been added than needed.

Error using matlab.system.SystemProp/parseInputs

dsp.LMSFilter System object constructor

supports only 1 value-only inputs. You have

specified 2 value-only inputs. A common cause

of this error is misspelling a property name.

Error in

matlab.system.SystemProp/setProperties

Error in dsp.LMSFilter

Error in SO (line 12)

ha=dsp.LMSFilter(256,mu);

Answer 1

[Asvin Kumar]

Consider using either of the following syntaxes:

ha=dsp.LMSFilter('Length',256,'StepSize',mu); 
ha=dsp.LMSFilter(256,'StepSize',mu); 

For more details have a look at the following example:

https://www.mathworks.com/help/dsp/ref/dsp.lmsfilter-system-object.html#mw_96bd654b-dba3-4efe-b8ea-cd660ca06370

For more details on the syntax for object creation and object properties refer to:

https://www.mathworks.com/help/dsp/ref/dsp.lmsfilter-system-object.html#d117e306608