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LG 65C12LA and sound output device (eARC)
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By chris7ben
The sound and picture are out of sync when screen mirroring from my iPhone 16 Pro to my LGQNED70A6A TV, using the internal speaker. I have tried all the recommended tips in the settings to cure the issue with no success. However, when I isolate the TV from the mains supply for 60 seconds and restart it, the syncing issue is cured but degrades after a day or so. My iPhone software is up to date and there is no firmware upgrade available for the TV. My LinkSys router has a full fibre connection. The only connection into the TV is the mains supply. Any help much appreciated. Thanks in advance.
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By hjetschko
Hi, I have a feature request for the sound out setting. I often connect my Bluetooth headphones to the TV. We don't use the internal speaker of the TV, we use the optical sound out setting whenever I don't use Bluetooth. It would make our lives a lot easier if the TV can remember the last sound out setting before connecting to Bluetooth and default back to this setting when the Bluetooth device gets disconnected. At the moment, each time I disconnect the headphones I have to go back into settings and change the sound out setting from internal speaker to optical again.
Thanks and regards
Hubert
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By John Peet
TV is a week old and the internal speaker has stopped working when in HDMI ARC + internal speaker sound output mode. The internal speaker itself works fine when in “internal speaker” sound output mode. I’ve checked all the settings that I can and can’t find anything that would correct this issue.
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By News Reporter
Debuting at CES 2026, LG’s Modular LG Sound Suite With Dolby Atmos
FlexConnect Makes Home Audio Simple and Flexible
SEOUL, Dec. 18, 2025 — At CES® 2026, LG Electronics (LG) is transforming home entertainment with LG Sound Suite, a home audio system that gives consumers unprecedented flexibility. At its core is the H7 soundbar – the world’s first with Dolby Atmos® FlexConnectTM – delivering immersive Dolby Atmos sound that adapts to a room’s layout without complicated setup.
LG Sound Suite works seamlessly with LG’s premium TVs, allowing users to pair any of its wireless components – including the M7 and M5 surround speakers, and the W7 subwoofer – with or without the H7 soundbar for 27 possible configurations. This flexibility means consumers can create the perfect setup for their space, whether starting small or building a full 13.1.7-channel home theater. And when the H7 soundbar serves as the lead device, Dolby Atmos FlexConnect works with any TV via HDMI, giving consumers the freedom to meet their entertainment needs. LG is also bringing Dolby Atmos FlexConnect to its 2026 premium TV lineup and select 2025 models* through a future software update, unlocking even more ways to enjoy Dolby Atmos.
Dolby Atmos FlexConnect delivers the simplest and most flexible way to bring immersive Dolby Atmos sound to your favorite big screen. Enjoy astonishing audio that makes every explosion more intense, every song more life-like, every game day more electrifying and every moment more memorable. Setup has never been easier – it’s flexible and intelligently tuned for your personal listening environment.
Audio is reclaiming its place in the living room as streaming has replaced physical media. Leading platforms now deliver movies, shows, and sports in Dolby Atmos and other advanced formats, making cinematic sound widely accessible. This shift has revived home theater, with consumers seeking immersive audio to match the stunning TV visuals. LG Sound Suite answers this demand with wireless convenience, simplicity and performance, bringing true surround sound back to the heart of the home. With Bluetooth and Wi-Fi connectivity, LG Sound Suite offers seamless pairing for streaming and device integration, making setup as simple as enjoying the sound.
In this regard, LG adds its own layer of innovation to elevate the experience. Sound Follow leverages ultra-wideband (UWB) technology to adjust the listening sweet spot based on the user’s location. When combined with Dolby Atmos FlexConnect, this ensures personalized immersion – so any seat feels like the best seat. Additionally, Room Calibration Pro analyzes acoustic characteristics and applies AI processing to refine the sound for a balanced, room-filling audio experience.
Powering the H7 soundbar is LG’s most advanced processor, the α (Alpha) 11 AI Processor Gen 3 – the same chip that drives LG’s flagship OLED TVs. Bringing this proven technology to audio delivers added performance and intelligence. The processor uses deep learning and its Neural Processing Unit to create sound with remarkable precision. With AI Sound Pro+, stereo audio can be up-mixed into multi-channel surround sound, while AI-powered object separation ensures voices, music and sound effects are clear and balanced. The system also adapts audio based on content type for optimized sound across different genres.
Every component in the LG Sound Suite features Peerless speaker units, a name synonymous with audio excellence for over a century and renowned for high-performance craftsmanship in premium speaker systems. By pairing the simplicity and flexibility of Dolby Atmos FlexConnect with the high-caliber acoustic performance of Peerless speakers, LG Sound Suite ushers in a new era of immersive Dolby Atmos sound.
“Together with Dolby, we’ve made immersive audio flexible for every home, LG Sound Suite is a testament to our shared focus on audio innovation,” said Lee Jeong-seok, head of the LG Media Entertainment Solution Company’s Audio Business Division. “LG Sound Suite combines Dolby Atmos FlexConnect with its wireless modular design and AI-driven tuning, so consumers can create the system they want and enjoy cinematic sound from any seat.”
“Dolby and LG are unlocking a new level of audio flexibility for anyone who wants to enjoy better sound with Dolby Atmos,” said John Couling, Senior Vice President of Entertainment at Dolby Laboratories. “Whether your speakers sit on a shelf or are tucked into a corner, Dolby Atmos FlexConnect fits naturally into any home without the complexity of traditional systems. We’re excited for consumers to experience this new level of audio flexibility and performance.”
LG Sound Suite will be on show during CES 2026 from January 6-9 at LG’s booth. To stay up to date with all of LG’s latest innovations and products for ultimate home entertainment experience, please visit the
link hidden, please login to view. # # #
* 2025 Models: G5, C5, CS5 and QNED9M.
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By Pranay Mokida
Issue
Whenever I start any video—whether it’s streaming apps, HDMI input, or a USB movie—the SC9S plays for a minute or two, then suddenly loses connection. Audio instantly falls back to the TV’s internal speakers, and the TV acts like the soundbar no longer exists on the eARC port. The soundbar display still shows “eARC” (sometimes flips to “OPT/ARC” for a second), but no sound.
Temporary Fix
The only thing that gets audio back is power-cycling the TV (standby isn’t enough; full reboot required). After that, the bar reconnects… until the next random dropout. This can happen multiple times during a single movie, which is a great way to kill the vibe.
What I’ve Tried
New HDMI 2.1-certified cable (same result, so original cable seems fine).
Disabled Quick Start+ and Simplink in the TV settings, then re-enabled.
Factory-reset both TV and soundbar.
Tested ARC instead of eARC—works, but no Atmos and same occasional dropout.
Plugged the soundbar into a different power outlet (in case of power spike).
Observed Patterns
Dropouts happen sooner with Dolby Atmos or DTS content, but even stereo YouTube videos eventually cut out.
No obvious heat buildup; bar is in open air, front facing.
Happens whether soundbar is wall-mounted or on its stand.
Questions for the Hive Mind
Anyone else seeing eARC instability with the SC9S on the UP77 series?
Could this be a handshake timing bug on the TV’s HDMI board?
Any hidden service-menu tweaks or firmware betas worth trying?
Should I just RMA the bar, or is the TV the real diva here?
Appreciate any insight—my couch and I thank you in advance!
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Question
Aliaksandr Baranouski
Hey guys,
While I have Sonos Beam gen2 connected to my LG 65C12LA via HDMI (eARC) I can’t select any other output device e.g. bluetooth headphones. I can technically select it in TV menu for like 5 seconds, and then output switched back to HDMI (eARC). Is it a bug or feature?
Thanks in advance!
2 answers to this question
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