As far as I know the Vero 4K+ is able to passthrough all audio streams.
There was a problem with Dolby Digital Plus - EAC3 audio recently, which has been fixed in a recent ‘staging release’, and will probably be in the next stable release. This scenario might be a problem for you, if you have a stable release installed.
** Enable all passthrough options in your audio settings and set the audio to 7.1
This Audio How To might help as well.