Chipmunk voices or no sowftare volume control when using player built-in audio transform filter

[bojkonil]

Hi, I'm using potplayer and lav filters, but when I speed-up playback for slow-running shows it results in chipmunk voices. Ticking the option to use the built-in audio transform filter fixes the chipmunk voice issue but somehow causes windows and player volume controls not having any effect on audio volume.

[Nevcairiel]

This is not a LAV issue, it neither does the transform nor control volume.