please help me in fix this error of Attempt to reference field of non-structure array.

my code is,

filename = 's5.wav';

au= audioread(filename);

y1=au.signal; % getting error in this line

fs=au.fs;

a=0.95;
y2 = filter([1, -a], 1, y1);

time=(1:length(y1))/fs;

au2=au;

au2.signal=y2;

audiowrite(au2, 's5_preEmphasis.wav');

[Claudio Stucki]

filename = 's5.wav';

[y1,fs]= audioread(filename);

a=0.95;

y2 = filter([1, -a], 1, y1);

time=(1:length(y1))/fs;

au2=y2;

audiowrite('s5_preEmphasis.wav',au2,fs );

Answer 1

[Geoff Hayes]

Pooja - see the documentation for this function at audioread. It returns the sampled data and sample rate as

 [y1,Fs] = audioread(filename);

and not as a structure (like you are assuming with your code).