Does the current wavpack codec offer support for dsd files? I recently tried to convert some dsf files, but ended up with files the exact same size. I'm not sure if that was because of lack of support or just wrong settings.
I did manage to compress the files using wavepack 5.1 and did get a savings of ~50% so if your current codec doesn't support dsd, I think it would be a valuable addition.
Cheers