Fix Nvidia Shield Pro not sending Dolby Atmos over HDMI
Dolby Atmos can sound fantastic when it works, but it often disappears, drops out, or shows up as plain “PCM” instead of Atmos on the front panel. Between TV apps, streaming boxes, consoles, and receivers, there are a lot of moving parts (and this combination fails more often than most people expect). This guide walks you through the common points where Atmos gets lost and how to restore it.
Start with the basics
- Confirm you are playing Atmos content
Not every movie or show provides an Atmos track. In Netflix, Disney+, and other apps, look for the Dolby Atmos badge on the title. - Check the audio output of the source
Set your streaming box, console, or TV to output bitstream Dolby Atmos or “Dolby Digital Plus with Atmos” instead of stereo PCM. - Verify the HDMI path
Make sure every device in the chain—TV, receiver, soundbar—supports Atmos over the connection you are using (eARC is usually required for TV apps).
Walk through the audio chain
- Source device settings
On an Apple TV, enable “Match Content” and set audio to Dolby Atmos. On an Xbox or PS5, choose bitstream Dolby Atmos in the audio menu. Restart the device after changing settings. - TV audio settings
For Atmos from TV apps, set sound output to eARC or “Auto (eARC)” instead of TV speakers. Some sets also have a “Digital audio format” option—choose “Pass‑through” or “Bitstream,” not PCM. - Receiver or soundbar input mode
Make sure the Nvidia device is not locked to a stereo or up‑mix mode. Use the “Info” or “Display” button to see what audio format it is actually receiving. - Cables and ports
Use a high‑speed HDMI cable for all links. If possible, avoid HDMI splitters and older switches while testing.
Expert tip: watch the format indicator while switching sources
Tip: When troubleshooting Atmos, keep the Info/Display screen open on your Nvidia device while you start content. You should see the format jump from PCM or Dolby Digital to Dolby Atmos or Dolby TrueHD as playback begins. If it never does, the Atmos flag is being stripped somewhere upstream, and you can work backward from there.
Scenario example
Scenario example: You play an Atmos‑branded movie in a TV app and your Nvidia device only shows “Dolby Digital+.” After changing the TV’s digital audio output from “PCM” to “Passthrough” and enabling eARC, the front panel updates to “Dolby Atmos” as soon as you restart the app.
Common problem patterns
- Atmos works from discs but not from streaming apps – Many TVs require eARC and the right digital‑audio setting for Atmos over apps, even though a Blu‑ray player works fine through the same receiver.
- Atmos works on one HDMI port but not another – Some TVs only pass Atmos from specific inputs. Check whether the port is labeled eARC or ARC and move the cable accordingly.
- Atmos only fails after sleep or input changes – Try fully power‑cycling the TV and Nvidia device, or disable quick‑start and energy‑saving modes that keep HDMI chips in a half‑awake state.
When to seek updates or support
If you have verified content, source settings, TV output modes, and the Nvidia device input format yet Atmos still refuses to show up, check firmware updates for all devices in the chain. HDMI‑eARC and Atmos bugs are routinely fixed in updates. When contacting support for Nvidia or your TV manufacturer, include which apps and sources fail, which HDMI ports you are using, and what the receiver or soundbar reports on its info screen—that detail dramatically speeds up the process.