Bill Unruh wrote: > I definitely agree that you want to avoid this . You might look at the > tests I did with the SOX rate conversion routines. Note that if you are > willing to take a long time, that rate conversion can be good. But it takes > a lot of processing and time-- doing a good job in real time is hard. And > linear interpolation, which is fast, is also terrible > > www.theory.physics.ubc.ca/soundcard/resample.html
Nice page. Fwiw, you can greatly speed up polyphase resampling using partial Fourier transforms, to do good quality in real time. I'm pretty sure Sox does not do this. But I vaguely remember there may be a patent involved if you need it with low delay and low processing cost at the same time. -- Jamie ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
