On Wed, Sep 27, 2006 at 11:16:27 +0100, James Courtier-Dutton wrote: > Hi, > > I was wondering if there are any tools out there to test audio > resampling quality. I am particularly interested in 44.1kHz to 48kHz > resampling due to the fact that most sound cards prefer 48kHz. > > At least with up sampling (low rate to higher rate) one does not get > aliasing. > > I really just want to find some algorithm that I can use to compare > 44.1kHz audio signal with an 48kHz audio signal, and to see if there has > been any lose of quality during the up sample.
I'm not sure if it's a good technique, but to test my dithering algorithms I took high precision FFTs of the input (sine wave IIRC) and output signals and looked for extranous peaks. You can see the test code in the tarball: http://plugin.org.uk/libgdither/libgdither-0.6.tar.gz c.f. http://plugin.org.uk/libgdither/TESTING - Steve
