TCL TVs with eARC support can pass Dolby Atmos audio to compatible soundbars, but the feature often fails due to incorrect audio settings. The TV processes audio internally instead of passing it through untouched, which strips the Atmos metadata that soundbars need.
Quick Answer
- Set Audio Output to HDMI eARC
- Set S/PDIF and ARC to Auto (not PCM)
- Turn Dolby Audio Processing to OFF
- Use Ultra High Speed HDMI cable in HDMI 3 port
- Verify soundbar supports eARC (not just ARC)
Symptoms
- Soundbar shows "Dolby Digital" instead of "Dolby Atmos"
- No sound from overhead speakers during Atmos content
- Audio cuts out when playing Atmos movies
- Soundbar displays PCM instead of Dolby formats
- Height channels remain silent during action scenes
Quick Checks
- Confirm HDMI cable connects to HDMI 3 (eARC port) on TCL
- Check soundbar display shows eARC connection active
- Test with known Atmos content (Netflix's "Our Planet" or Disney+ Marvel movies)
- Verify streaming app shows Atmos badge on content
- Look for "eARC" indicator on soundbar's display panel
Step-by-Step Fix
-
Press Home button on TCL remote and navigate to Settings
-
Go to Audio settings:
- Settings → Audio → Audio Output
- Select "HDMI eARC"
-
Configure passthrough mode:
- Stay in Audio menu
- Find "S/PDIF and ARC" setting
- Change from PCM to "Auto"
-
Disable audio processing:
- Go to "Dolby Audio Processing"
- Set to "OFF" (critical for passthrough)
-
Check HDMI connection:
- Use Ultra High Speed HDMI cable
- Connect to HDMI 3 port (labeled eARC/ARC)
- Connect other end to soundbar's eARC port
-
Test Atmos content:
- Open Netflix or Disney+
- Play content with Atmos badge
- Check soundbar display for "Dolby Atmos"
If TCL eARC Dolby Atmos Still Not Working
Try different streaming apps. Some apps output Dolby Digital Plus with Atmos while others use TrueHD. Netflix and Disney+ work most reliably.
Power cycle both devices. Unplug TCL and soundbar for 30 seconds. Plug in soundbar first, then TV.
Check for firmware updates. Go to Settings → System → System Update on your TCL. Update soundbar firmware through its companion app.
Verify cable specifications. Standard HDMI cables lack bandwidth for eARC. You need Ultra High Speed HDMI Cable (paid link) rated for 48Gbps.
Test with different HDMI port. Some TCL 6-Series units have eARC issues with HDMI 3. Try HDMI 4 if available.
For broader eARC connection issues, see our guide on TCL TV eARC/ARC not working with soundbar.
Paid link: GadgetGuiders may earn a commission at no extra cost to you.
FAQ
Why does my TCL show Atmos in the app but soundbar shows Dolby Digital? The TV's Dolby Audio Processing is ON, which converts Atmos to regular Dolby Digital. Turn this setting OFF to pass the original audio untouched.
What's the difference between ARC and eARC for Atmos? Regular ARC lacks bandwidth for lossless Atmos audio. eARC provides the full 37Mbps needed for uncompressed Dolby Atmos from streaming apps.
Do I need a special HDMI cable for TCL eARC Atmos? Yes. Ultra High Speed HDMI cables support the 48Gbps bandwidth that eARC requires. Older HDMI cables will cause dropouts or force the connection to regular ARC mode.
Why does Atmos work on some apps but not others? Streaming services encode Atmos differently. Netflix uses Dolby Digital Plus with Atmos, while some apps use other formats. Your TCL's Auto setting should handle most variations, but individual apps may have compatibility quirks.