The CX31993 features an impedance-sensing auto-gain mechanism that can limit power output for low-impedance headphones. To "fix" this and unlock full power, connect a high-impedance adapter or leave the 3.5mm plug empty when first plugging the USB-C end into your device, then plug in your headphones.
You must explicitly write 0x1F to register 0x02 during the boot sequence to force the clock multiplier into high-stability mode. Without this manual override, the chip suffers from severe clock jitter and intermittent audio dropouts. 2. Jack Detection Debounce (0x15) Cx31993 Datasheet Fix
: Many standard music players (Spotify, Deezer, Poweramp) do not support direct audio output to a USB DAC. To fix this, you need to use a player that supports USB Exclusive Mode . Apps like Poweramp or HiBy Music allow you to enable this feature in their settings. Once enabled, these apps bypass the phone's internal audio processing and send the bit-perfect audio directly to the CX31993. Without this manual override, the chip suffers from