Youtube Music

Listen/watch music stream and now they go through my avr and then onto a smart tv. I listen to these vids in stereo mode, and they sound good.

I have a youtube vanced apk analogue stereo preamp.  Any creative way to have the music flow thru this preamp to tak advantage of preamp benefits, or is this strictly a digital signal, although it becomes analogue before it leaves avr to reach speakers. 
I have a standalone dac but no hdmi port. Only usb.