upslp - upsampling lowpass filter analysis. Demonstrate 11025/22050/44100 to 88200 upsampling filter design using interp() and two lowpass filter design methods. ups.m focuses on the signal. This function focuses on lowpass filter design. The following parameters can be changed in the code: R - upsample factor, selects the sound source sample rate bSnd - play sound flag, 1 or 0 yy,fs - source signal and sample rate (optional, see wavread() in code) See also: ups.m, upstest.m