Audio Signal Processing & DHT Is there any matlab (default) function for Discrete Hartley Transform? And is it applicable for audio signal? I want to apply it instead of DWT or FFT.
There is no in-build MATLAB function for DHT, but you can implement it very easily using the fft function:

function H=dht(x)
    X = fft(x);
    H = real(X) - imag(X);
end