I have a Philips TV (32pfl4507f7) and Sonos Beam. No optical audio out on the TV so I've connected audio coax out to a converter (coax to optical) into Sonos Beam optical to hdmi provided and then to the Beam. Sound is fine. Volume control only available by Alexa on the Beam. No volume control on the Philips remote or Firestick remote. How can I get volume control on my remotes (Philips TV and/or Firestick)?