When connecting external devices that can output multichannel PCM directly to a TV supporting eARC, the TV’s HDMI input ports should be set to bitstream and the Digital Output Audio should be set to Passthrough, not PCM.
Setting the output to PCM will down mix all incoming signals to PCM 2.0 for output. Input source devices will be communicated the info and limit their settings accordingly. LG TVs must also have eARC Support enabled or signal output will be bandwidth limited to the ARC spec and result in a down mix of multichannel PCM signals from an input source device.
Using Dolby Atmos for Home Theater setting with an optical cable limits signal output to Dolby Digital 5.1 and multichannel PCM will be off the table. If using HDMI for connection to a TV and eARC out to a device such as the Flex HT, select 7.1 uncompressed sound output in the input source device. Device settings and capabilities will vary of course.
Setting the output to PCM will down mix all incoming signals to PCM 2.0 for output. Input source devices will be communicated the info and limit their settings accordingly. LG TVs must also have eARC Support enabled or signal output will be bandwidth limited to the ARC spec and result in a down mix of multichannel PCM signals from an input source device.
Using Dolby Atmos for Home Theater setting with an optical cable limits signal output to Dolby Digital 5.1 and multichannel PCM will be off the table. If using HDMI for connection to a TV and eARC out to a device such as the Flex HT, select 7.1 uncompressed sound output in the input source device. Device settings and capabilities will vary of course.