Discontinued
Forward audio layer
The Forward Audio channel is a second independent S/PDIF audio stream not related to the Embedded Audio. A separate S/PDIF matrix switch manages Stereo PCM, 5.1 Dolby Digital and DTS, and various other formats.
Return audio layer
Return Audio Layer creates the ability to send two different multichannel audio streams, one from source to display and another, a return channel in the opposite direction. Audio Return Channel (ARC) was introduced by the HDMI 1.4.standard. This S/PDIF signal is sent in the opposite direction to the video signals. Usually displays send ARC to source devices ‑ typically TV sound to audio receivers, or microphone sound from headsets to computers.
Forward audio layer
The Forward Audio channel is a second independent S/PDIF audio stream not related to the Embedded Audio. A separate S/PDIF matrix switch manages Stereo PCM, 5.1 Dolby Digital and DTS, and various other formats.