LG S60 soundbar suddenly makes voices sound like they're coming through a microphone/tunnel. Nothing fixes it.

Title: LG S60 soundbar suddenly makes voices sound like they're coming through a microphone/tunnel. Nothing fixes it.

Hey everyone,

I have an LG S60 soundbar connected to a TCL Google TV, and out of nowhere the dialogue started sounding really strange—almost like people are talking through a microphone, megaphone, or from inside a tunnel. Music and sound effects seem mostly okay, but voices sound awful.

Things I've already tried:

• Factory reset of the soundbar
• Unplugging everything for several minutes
• Switching between all sound modes (Standard, AI Sound Pro, Cinema, etc.)
• Turning off Dolby Atmos and other audio enhancements
• Setting the TV's digital audio output to PCM
• Testing multiple apps (Netflix, YouTube, regular TV)
• Testing with the TV speakers only

The TV speakers sound completely normal. The issue only happens through the LG S60.

Before I assume it's a hardware failure, has anyone experienced this with an LG S60 or similar LG soundbar? Could the center channel or audio processing board be failing, or is there another setting I should check?

Any advice would be greatly appreciated. Thanks!