325xi;182227 Wrote: > I would like to hear opinions of knowledgeable people on the proper ways > to do resampling of audio files on pc using different software. By > resampling here I mean either downsampling, as from 96/24 or 88.2/24 > recently discussed in Linn downloads threads; or upsampling, for > example to 96kHz. > > The reason why I would like to discuss it is that yet recently DSP > processing was considered "coarse language" in audio forums, and the > processed files were often audibly different from the original, not in > good way. > > On the other side, I heard that due to dramatic increase of available > computing power on modern computers, DSP algorithms allowed to > themselves to become smarter and more sophisticated, so this is not an > issue anymore. > > So, the questions: > > - do all the resampling software available to home users does the job > properly, or we still have 'em better and worse? > > - what kinds of resampling are always safe, and what are we better to > avoid?
I'm not sure I will pass your test of being knowledgable, but I do have subjective experience with this. Since the SB is capable of 48Kbps only, I have source material that needed to be downsampled for more efficient storage and avoiding the "throw every other bit away" approach to downsampling the SB uses on the fly. I didn't know what DSP algorithm would work best so I first tried PPHS(Default in Foobar2K). I thought the sound was a little hash-brighter than the original(as heard directly through a DAC) -- but wasnt sure. Only when I can compare two streams on the SB directly after each other would the testing be more conclusive. I then used the SRC(Secret Rabbit Code) I had read much about and loaded it in Foobar2K. It took considerably longer to downsample than PPHS(much much more) -- and hoged all my CPU power while doing it. However, upon listening it was completely obvious, SRC sounded much smoother to me -- the grainyness and edginess was reduced -- verified repeatedly by A/B testing. I will never use PPHS again. I was hoping I'd like PPHS better as it was extremely fast....oh well. Just my experience.....YMMV.... -- jt25741 SB3->AR Masters Coax -> PS Audio DLIII -> Coincident CST IC XLR -> Sim Audio P5 -> Cardas Golden Reference XLR -> Sim Audio W5 -> PS Audio Xtreme Plus(Low) AQCV4(mid/hi)-> Magnepan 3.6R ------------------------------------------------------------------------ jt25741's Profile: http://forums.slimdevices.com/member.php?userid=8645 View this thread: http://forums.slimdevices.com/showthread.php?t=32958 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
