Volumio + HiFiBerry DAC+ + Tuneblade: No sound

Running the Volumio image on a PI3, with HiFiBerry DAC+ Std. Works ok playing mp3 from USB disks.
But I want the PC audio (YouTube, movies etc.), and have been messing with Tuneblade for 2 days, I think I’ve tried each and every combination of settings in the Tuneblade’s Audio Capture settings. The closest I’ve got is a connection, and Volumio shows the running timer and “System Audio Tuneblade”,
but there is no audio out of the DAC and no green light on it.

Any ideas?