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Hey my friends. Inquiring on some settings help. My setup is currently an LG TV with a Firestick 4K (using YouTube tv/Netflix/etc.) I have a Beam (gen 2) with 2 One SL’s as my surround. ARC is established. 

My questions are on both the tv and Firestick settings:  everything connected via HDMI  

LG TV Settings:

Sound Out: HDMI ARC

Question 1: Digital Sound Out…..options are Auto, PCM, or Auto??

Question 2: HDMI Input Audio Format (HDMI 1 = Firestick). Bitstream or PCM?

Question 3: HDMI Input Audio Format (HDMI 2 = Beam into ARC input). Bitstream or PCM?

Firestick Settings:

Question 4: Surround Sound setting: Best Available, PCM, or Dolby Digital, Dolby Digital Plus?

Much appreciated for the support my friends!  

For Fire TV Sound - choose either ‘Best Available’ or ‘Dolby Digital Plus’. I tend to use ‘Best Available’

For the LG TV:

Digital Sound Out - Choose ‘Auto’ (however, see if this setting has ‘Pass-Through’ (If ‘Pass-Through’ is available, then select that instead of ‘Auto’)

Set both the HDMI ports mentioned to ‘Bitstream’

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