On 2010-08-18 at 16:35:34 [+0200], Stephan Assmus <superstippi@xxxxxx> wrote: > Am 18.08.2010 15:02, schrieb pulkomandy: > > Some days ago I introduced a new resampler that uses interpolation in > > the media kit. I'm still not happy with it, so I'm going to write > > another resampler, this time using a Lanczos filter, which should give > > much better results. > > I would guess something is wrong with your filter, but some months ago > (years?) I also wrote an uncommited resampling version and was also > wondering why it didn't seem to have any affect on the quality. I did > not trust my implementation though, just curious that you also seem to > be unhappy with your resampling. In theory, it should already have > enough quality. One problem with simple interpolation is that it introduces high frequency noise, so it has to be followed by a low-pass filter. I haven't looked at the code, but if you haven't done that, it would explain the poor quality. A quick look at Wikipedia suggests that the Lanczos filter is a low-pass filter, so I guess better quality can be expected when using it. CU, Ingo