Cx31993 Datasheet Fix Better -

Maximizing Your Mobile Audio: The CX31993 DAC "Fix" and Beyond

Users often report that the CX31993 can sound overly bright or "thin" with certain headphones. cx31993 datasheet fix better

5. I2C and SPI specifics

The Cx31993 is a very popular audio codec (ADC/DAC) used in many Linux-based devices, notably Pine64 products like the PinePhone and PineBook Pro. Maximizing Your Mobile Audio: The CX31993 DAC "Fix"

Verdict: A properly fixed CX31993 beats the Apple dongle for high-res listening because the Apple dongle is hardware-capped to 48kHz on Android/Windows unless you use expensive apps. I2C and SPI specifics

The reverse-engineered specs (community aggregated):

• DAC Architecture: 32-bit Sigma-Delta
• SNR (Signal-to-Noise Ratio): 118dB (claimed) / ~115dB (measured)
• Output Power: 1Vrms (standard) / 2Vrms (some implementations with separate amp)
• THD+N: -95dB typical
• Pinout: USB controller + DAC + AMP in single QFN-20 package.