MATLAB - Hiding a 24 bit file within an 8 bit file.

Thank you for reading my post, I am attempting to hide an 8 bit audio file within a 24 bit audio file. The hiding seems to work , however the output file generated has not audio sound in it.
could someone tell me where am I going wrong?

Thanks
Raj

Here is the code:

mus1=handles.mus1; % (this is the 24 bit audio file)
mus2=handles.mus2; % (this is the 8 bit audio file)
s1=size(mus1)
s2=size(mus2)
s3= s2*8
if s1(1,1) > s3(1,1)

for i$:-1:1
bitp=bitget(uint8(mus1(i,1)),1);
bitstr=bitget(uint32(s2),i);
if(bitp ~= bitstr(1,1))
if mus1(i,1)~%5
mus1(i,1)=mus1(i,1)+1;
else
mus1(i,1)=mus1(i,1)-1;
end
end
end

k%;
i=1;
while (s1(1,1) > k-1) && (s2(1,1) > i-1)
j1=1;
str=mus2(i);
for j=k:k+8
bitp=bitget(uint8(mus1(j,1)),1);
bitstr=bitget(uint8(str),9-j1);
j1=j1+1;
if(bitp ~= bitstr)
if mus1(j,1)~%5
mus1(j,1)=mus1(j,1)+1;
else
mus1(j,1)=mus1(j,1)-1;
end
end
end
k=k+8;
i=i+1;
end
[filename, pathname] = uiputfile({'*.wav','*.wav'},'Save');
new3=[pathname filename];
wavwrite(mus1,new3);
else
errordlg('The size of audio 1 (24 bit) should be greater than size of audio 2 (8 bit)')
end