PhatDac Software Audio Control

Hi All,

A real beginner, so forgive any stupid questions…

I’ve just added a PhatDac to my ZeroW so that I can turn some speakers in to a bluetooth receiver, used this guide: https://www.raspberrypi.org/forums/viewtopic.php?t=235519

Everything works well and sounds great, the only issue I have is that I can only control the audio volume from the speakers themselves and neither the Pi or the device that’s transmitting the audio (In this case a Samsung S10+ via Spotify)

The audio control is muted and when I go to preferences > Audio Device Settings, I get the attached screenshot.

Error

Thank you in advance!

Alex.