Addressing Deficiencies in the CX31993 Datasheet: A Case for a Complete Public Technical Reference
The Cx31993 is a Conexant (now part of Synaptics) product. Conexant is notoriously restrictive with their documentation. They do not publish datasheets publicly on their website; they require an NDA (Non-Disclosure Agreement) and a business relationship to access technical manuals. cx31993 datasheet fix better
The CX31993 is infamous for stuttering on ARM SBCs (Single Board Computers). The typical error is snd_pcm_recover underrun occurred . : Create an ALSA configuration file ( /etc/asound.conf or ~/.asoundrc ) to increase the buffer size significantly. Adding pcm.!default type hw card DAC and ctl.!default type hw card DAC can also force the system to use the correct audio parameters. If the issue persists, disable the onboard audio entirely in the BIOS or raspi-config to free up DMA channels for the USB DAC. Addressing Deficiencies in the CX31993 Datasheet: A Case