Simultaneous browser and mopidy audio?

I feel like I’m missing something obvious. I’m using mopidy-spotify and ncmcpp to play spotify. That all works fine. However when I try to play anything within my chrome browser it will not play, just buffer. As soon as i either:

sudo pkill mopidy
or
sudo service mopidy stop

the video and audio in browser will play. I think its general ignorance about how it works but I’m guessing my browsers stream is being routed to mopidy in some way and will not play natively in the browser. Is there any way to separate them out?

Cheers

[EDIT} seemed to have found a fix here, issues with pulseaudio.
https://docs.mopidy.com/en/latest/service/#configure-pulseaudio