HiFiBerry Digi+ trans

Volumio Information

Volumio Version: 2.834
Hardware: Pi3
DAC: HifiBerry Digi+ trans

Hi Guys,

What is the right settings for the HifiBerry Digi+ trans., connected to HiFi by optical cable (Toshlink)?
It is playing but the sound is bit fast - so I think that in the Audio Resampling (or Bitrate or similar is set wrong)
Can somebody give some help for right settings?