DTS music playback from WavPack (.wv) files

Have several DTS music albums with tracks in WavPack format for tagging convenience. Yesterday noticed that they are not playing properly, all I hear is hiss…Frown

This was surely working OK in Jarvis and probably in early Krypton betas too. Currently using beta 7. Tried reinstalling previous betas (down to beta 3) to no avail, still just hiss.

Anybody else having the same problem?