Hi @jussi_laako !
Updated from 4.3.1 DesktopMac to 4.6.0 Desktop Mac - many, many problems. With 4.3.1 HQP was running without any fault or issue, total unimpressed by a lot of switches between fileformats (flac, DSD, MQA, mp3), sample rates or filters.
Witrh 4.6.0 a switch from even one sample rate (44.1) to another (96.0) causes white noise and distorsion. Also switching between fileformats causes this problem. One album (same sample rate and format) is playing flawless, but the switch to another album causes the error.
Sometimes it is possible to reset this by playing a DSD file, but mostly the white noise/distorsion does not disappear by switch to DSD file. Only HQP restart solves the problem.
I downgraded to 4.3.1 again because this version is without issues for me.