Hey everyone, hoping someone here has run into this or can confirm if it's a hardware limitation.
I recently picked up a Find X9 Ultra, and overall, the hardware is incredible. However, I’m running into a frustrating wall with the Bluetooth audio stack.
I’m pairing it natively with a set of Sennheiser HDB 630s, which fully support aptX Adaptive at 24-bit/96kHz. But ColorOS refuses to push anything higher than 48kHz.
Here is where it gets weird:
- If I go into Developer Options and manually switch the Bluetooth Audio Sample Rate to 96.0 kHz, the audio completely drops out.
- It stays dead silent for about 10 seconds.
- Then, the OS seemingly panics, fails the handshake, and silently reverts the setting back to 48.0 kHz, and the audio comes back.
I already know I can bypass this by plugging in the Sennheiser BTD 700 USB-C dongle. I tested it with Tidal and it pushes the full 96kHz to the headphones perfectly, but the phone by itself is just stuck at 48kHz max. I bought a flagship phone to use natively, not to hang dongles out of the bottom port.
Has anyone else experienced this exact audio drop-out when forcing 96kHz in Dev Options? Does the Find X9 Ultra simply lack the premium Qualcomm "Snapdragon Sound" license required to encode a 96kHz stream, or is this just a known ColorOS handshake bug?
Any insight would be hugely appreciated!