To benefit of the Rose’s DAC (RS150B) and a better sound, I have connect both, RCA and HDMI from the Rose to my processor (Marantz AV7705). When I listen to video music from Rosetub, I choose on the processor the RCA input where the Rose is connected , and then I can associate the video input that I want, so I choose HDMI input corresponding on the processor. Note, that once the association audio-video input is set, you don’t have to do it again, until you want to change for an other input.
When you listen only to music from the Rose, let say a track from your collection, the album and info are displayed on the TV screen.
Hope this help a bit, good luck