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Wavpack - Something you missed ?

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JunoAudio:
Hi,

When using the format converter with DSD files and converting to the Wavpack format, there should have been an option to keep data DSD but compressed thus saving a lot of space !

Cheers.

Awesome Donkey:
It's worth noting that if you're converting DSD (e.g. from SACD ISOs, DFF or DSF files, etc.) to WavPack it's likely going through a PCM conversion stage in the middle unfortunately, as all DSD conversions in MC do. So it may not be the best option for doing those sort of conversions if that's a concern of yours.

dtc:
At least one source says that the Wavpack DSD compression is lossless and reversible.  They compare it to dff compression, which is lossless.  There is no reason that DSD cannot be losslessly compression. It just takes an algorithm tailored to the format.

" it now possible to losslessly compress (ie. the compression is reversible without any loss) DSF and DFF files for free by up to 60% depending on source file and compression rate used"
"
https://diyaudioheaven.wordpress.com/digital/pc-software/compressing-dsd-files-with-wavpack-5/

This seems to be confirmed on the Wavpack website

"The hybrid mode is not usable with DSD audio files; those are always lossless and attempting hybrid compression with them will generate an error."

I have not tried this compression of DSD file, but it seems like it may well be lossless.

dtc:
Here is a report that someone tried the Wavpack losses compression of DSD and indeed the compressed then decompressed file was identical to the original.

Seems like the Wavpack DSD compression is indeed lossless.

https://thepenguin.eu/2018-01-02-losslessly-compressing-dsd-files-with-wavpack/

Awesome Donkey:
Indeed, but I meant if you're doing the conversions within Media Center itself, it's probably going through a PCM conversion stage in the middle as I don't think Media Center is currently setup to do a "conversion" this way. Media Center doesn't "repackage" DSD from one format to another, it always goes through PCM in the middle when there's a conversion, so it's something to consider. And if that's indeed the case, you might have to do your DSD to WavPack "repackaging" with compression outside of Media Center and re-import the files.

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