Does this even make sense? WavPack is lossless, so the only effect of different switches would to be to change the packing efficiency, not to change the audio content.
Ah, now I understand.If you are using it lossy then is there any advantage to leaving it as 24/96?
other codecs like AAC or WMA-Professional simply discard everything above 20 kHz
So do your ears
If you're not doing anything with those 24/96 files other than simple playback and you want smaller file-size, have you considered resampling and dithering down to 44.1/16? The bonus of doing that is that you can easily burn them to CD as well. You're not going to hear the difference if all you're doing is playing them back.
Hello guys.I´ve did a search for this but I found no answer. I´m using WavPack a lot recently on high definition files (24/96) and I have a question. I would like to know why WavPack disables the dynamic noise shaping when used with sampling rates above 64 kHz?Will I get a benefit when I use the switch --use-dns? When using WaveLab´s frequency analysis on files that were processed without any switch I´m getting dynamic high frequency content over 20 kHz which I assume is quantization noise. When I´m forcing the -dns switch this noise is much lower but I think it is still there. Where is it? Is it masked in the lower frequency regions (20-20.000 Hz)?Thanks in advance for an answer. BTW, great codec!
In a very simplified description, the dynamic noise shaping feature attempts to move the quantization noise toward where the signal is. At normal sampling rates (where all frequencies represented are potentially audible) this can reduce the audibility of the quantization noise because it is masked by the signal.However, in the case of higher sampling rates where the top octave (and sometimes more) are beyond the range of human hearing, it might make more sense to bias the quantization noise in that direction, which can dramatically reduce the noise in the audible range. That's the reason that the dynamic noise shaping is disabled for high sampling rates; instead the noise shaping is equivalent to -s1.0 to force the noise up in frequency at 6 dB / octave. If you force the dynamic shaping on with the –use-dns switch then the noise will be permanently shifted toward lower frequencies because that's where the signal is.I discuss this some in this thread and included some spectrum analysis showing the noise distribution. I did not do the same thing with DNS, but the noise in the audible range would be much higher.BTW, thanks! edit: added sentence for clarity