Roku Ultra is a 4K60 player, so the original Arcana is normally enough. One setting decides everything: Auto (passthrough).
This streaming solution is often used for Netflix, Disney+, Apple TV+, Prime Video and other apps. Correct HDMI and audio settings prevent Dolby Atmos from being reduced to stereo or compressed audio.
Arcana extracts audio from the HDMI signal before a TV or projector can restrict it. A compatible soundbar or receiver can therefore receive the best available soundtrack while the video signal continues to the display.
Both models work. Arcana 2 mainly provides more connection options.
Cable order: Roku Ultra → Arcana HDMI IN → HDMI OUT to TV/projector + eARC to soundbar
Use this route when 4K60 is sufficient and you need one video output.
Cable order: Roku Ultra → Arcana 2 HDMI IN → TX0 to TV/projector + eARC to soundbar
Use TX1/HDMI audio when a second display or HDMI receiver is required.
Both models work. Arcana 2 mainly provides more connection options.
Only use EDID, scaling or lip-sync corrections afterwards when the standard route demonstrably does not work.
The settings above are the starting point. These are the things that most often go wrong on this specific device.
Roku offers Auto and Auto (passthrough). Only the passthrough option sends the original bitstream on; plain Auto lets the Roku decode. For Atmos through an Arcana you want passthrough.
Still not right? Work through the troubleshooting pages — no Atmos, eARC falling back, lip sync and a black screen at 4K120 are covered there step by step.
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