saatwik
Newbie level 3
I'm fairly new to MATLAB, so please excuse me for any mistakes or ignorance.
I'm having to use the (very old) hpeq toolbox for this because we don't have the post 2006 variant of MATLAB in our college lab (which incorporates the parameq option in the FDATool).
With hpeq, what I have is:
[B,A,Bh,Ah] = hpeq(N,G0,G,GB,w0,Dw);
where
B and A are rows are the numerator and denominator 4th order section coefficients of the equalizer and Bh and Ah are the rows are the numerator and denominator 2nd order coefficients of the lowpass shelving filter.
I can use these to generate a graph for what response I'll get for different values of the parameters used in the function, but what I can't understand is how to apply these values on an audio file. I know that for, say, a Butterworth filter, this can be done by using filtfilt as:
fl = 200 / (fsample/2);
[b,a] = butter(10, fl, 'low');
sampleLow = filtfilt(b, a, sample);
but this isn't working with the hpeq function. What can I do?
Thanks.
I'm having to use the (very old) hpeq toolbox for this because we don't have the post 2006 variant of MATLAB in our college lab (which incorporates the parameq option in the FDATool).
With hpeq, what I have is:
[B,A,Bh,Ah] = hpeq(N,G0,G,GB,w0,Dw);
where
B and A are rows are the numerator and denominator 4th order section coefficients of the equalizer and Bh and Ah are the rows are the numerator and denominator 2nd order coefficients of the lowpass shelving filter.
I can use these to generate a graph for what response I'll get for different values of the parameters used in the function, but what I can't understand is how to apply these values on an audio file. I know that for, say, a Butterworth filter, this can be done by using filtfilt as:
fl = 200 / (fsample/2);
[b,a] = butter(10, fl, 'low');
sampleLow = filtfilt(b, a, sample);
but this isn't working with the hpeq function. What can I do?
Thanks.
Last edited:
