Hi all,
I'm dealing with a persistent audio issue on my TCL 65C849 (2024, C845X2/T653T01 platform) and looking for ideas before reaching out to TCL support.
**The issue:**
During musical scenes (movie score, opening/closing credits...), the audio pulses rapidly in volume — kind of a "pumping" effect. It's audible across multiple sources: at least Canal+ and Disney+. The problem seems intermittent: if I rewind and replay the exact same scene, it can play normally the second time. Simply pausing and resuming during an episode of pulsing also stops it immediately.
**Setup:**
\- TCL 65C849, 2024, C845X2/T653T01 platform
\- Direct sound through internal speakers (no soundbar, no eARC)
\- Wall-mounted with a bracket giving 37 mm of clearance (above TCL's recommended minimum)
\- Firmware: recently updated from V655 to V667, no improvement on this specific issue
**What I've already tested/ruled out:**
\- AVL (Auto Volume Leveling): already disabled
\- Digital audio output: already set to PCM (no active Bitstream/Auto option)
\- No DTS or DRC option visible in the menus (audio menu is very limited on this model)
\- Wall clearance: 37 mm, above the recommended 2 cm, so the rear-mounted subwoofer doesn't seem obstructed
\- Firmware update V655 → V667: no change on this specific issue (V667 fixed other audio complaints for some users on the TCL Telegram channel, but not this one for me)
Has anyone run into this kind of volume pulsing on a TCL (or another brand with a similar chipset, Pentonic)? The fact that it stops just by pausing makes me think it's more of a decoding/buffering glitch than a hardware limiter, but I'm open to any leads or experiences