From: robs <aq...@ya...> - 2009-01-21 16:45:49
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--- On Wed, 21/1/09, Klaus Schulz <kls...@go...> wrote: > I tried dither and dither -s when going from 96k to 44.1k > last night. Gave > me heavy noise on the output. > Best result I had actually without dither. > > Do I have to play with the > bitdepth of dither? No, this is probably because the input signal level is too high to allow dither to be added (and, as mentioned in the post below, this is not currently handled well). See FAQ #5: http://sox.sourceforge.net/Docs/FAQ for how to deal with this. Cheers, Rob > > Noise shaped dither was requested only days before SoX > 14.2.0 was due to be > > released so it was a bit of a rushed job. > Nevertheless, it turned out fairly > > well. Clipping detection/handling is not good though; > this has been fixed > > for the next release. The Shibata filter (the default > with dither -s) is > > pretty good, not quite as good in absolute terms as > Alexey Lukin's Extrabit, > > however I suspect that Extrabit is overkill for all > but very special > > situations. |