On Mon, Nov 12, 2012 at 02:39:17PM -0800, Len Ovens wrote: > To change things to 48k you would have to do that outside of ardour. I > would suggest against doing that except as a final step after mixdown as > any time differences from track to track in the resample would be > magnified by such a long track. Even in shorter cases stereo imaging could > be affected. You must be using a *really* crap resampling app if you get that sort of effects. If you import the tracks in Ardour with resampling, or if you use sndfile-resample, the work is done by Erik's libsamplerate. This uses (double precision) floating point to maintain the filter phase, and that will indeed lead to accumulating roundoff errors. But in practice these are *absolutely insignificant*. I actually did the test, checking the timing after 10 hours of resampling from 44.1 to 48 kHz. Within the precision of the test (around 1 millionth of a sample, 25 picoseconds) there was *zero* error. And if you use zresample the problem doesn't exist by design, as it uses only rational arithmetic (i.e. all integers) to do the same calculations. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
