The “Fix” (available as a markdown document on several audio DIY forums) cross-references real-world logic analyzer captures, manufacturer reference schematics, and successful open-source firmware implementations. It also adds a recommended register initialization sequence that stabilizes the chip’s internal DC offset calibration – a known cause of the “pop on plug-in” complaint.
The chip is efficient but not a powerhouse. For high-impedance headphones (300 Ohms+), it may struggle. The "fix" here is using a dedicated external amp or choosing a different chip like the ES9281C Pro if you need more volume headroom. Conclusion Cx31993 Datasheet Fix
Ensure USB OTG (On-The-Go) is enabled in your phone's developer settings if the DAC doesn't power on immediately. Technical Reference (Hardware Specs) Conexant (CX-Pro) CX31993 USB-C Amp/DAC Review The “Fix” (available as a markdown document on