Cx31993 Datasheet Fix Better -
The "CX31993" datasheet "fix" is a case study in vendor obfuscation. The "better" version of the documentation exists not as a paper manual, but as the collective knowledge base of the Linux audio driver tree. If you have a specific electrical issue with this chip, you may need to trace the schematics of a working device rather than relying on the official documentation.
, to provide a "better" and more powerful driving force for demanding headphones. According to product listings on and specialty retailers like ConceptKart , its core capabilities include: Hi-Res Audio Support : Maximum sampling rate of 32-bit / 384kHz , allowing for high-definition, lossless playback. High Signal-to-Noise Ratio (SNR) : Delivers an impressive -128dB SNR
When users search for "Cx31993 datasheet fix better," they are usually trying to solve one of two problems:
For USB-C iPhones or Android devices, is the main problem. cx31993 datasheet fix better
: A small -2dB or -3dB dip in the 8kHz–10kHz range usually "fixes" the harshness.
: For desktop users, the "secret" to getting the DAC to auto-configure upon plugin is setting hw.snd.default_auto=2 in the system configuration file . Audio Characteristics and Pairing
Download an app like USB Audio Player PRO (UAPP) or Hiby Music. These apps bypass the Android OS resampler (which forces all audio to 48 kHz) and output bit-perfect audio directly to the CX31993 chip. The "CX31993" datasheet "fix" is a case study
| Parameter | Specification | Notes & Confidence | | :--- | :--- | :--- | | | 32-bit | Official Conexant page via WarmSeaIC | | Max PCM Sample Rate | 384 kHz | Official Conexant page; confirmed by independent audio tests | | DSD Support | DSD64/128 (DoP) | Found in most dongle specs (e.g., JCALLY, Celest) | | SNR (Signal-to-Noise Ratio) | >128 dB | Widely cited in product specs / WarmSeaIC summary | | DNR (Dynamic Range) | >120 dB | Cited in many product descriptions | | THD+N (Total Harmonic Distortion + Noise) | <0.0003% | Cited in many product descriptions | | Output Power (Standard) | 65mW @ 16Ω / 30mW @ 32Ω | Cited in many product descriptions | | Supported Headphone Impedance | 16Ω – 600Ω | Cited in many product descriptions | | Power Supply Voltage | ~5V | USB bus-powered | | Power Consumption | Very low | "Runs cool" / consumes only a few milliamps per official CX31993 page | | Amplifier Topology | Class G (at least in Framework Card implementation) | Direct from a developer contact with Conexant | This noise might be filterable | | Output Voltage (Vrms) | 1.0–1.1V (standard standalone) | For standard CX31993 dongles, confirmed by ASR Meizu mBlu discussion | | Output Voltage (MAX97220 combo) | Up to ~2V (high-gain) | This voltage doubling may cause hiss with ultra-sensitive IEMs |
Drop down the menu and manually change it to 32-bit, 384000 Hz (Studio Quality) .
The OEM version (consumer dongles) is generally not user-updateable. Only OEM manufacturers or Chromebooks using the "Synaptics CAPE" plugin can flash the chip to fix host-specific bugs. , to provide a "better" and more powerful
The "CX31993" is likely a reference to the Cirrus Logic CS51983 (or the related CS4206/CS4207), a High Definition (HD) Audio Codec used in many laptops (notably Apple MacBooks and Dell machines) during the late 2000s and early 2010s. For years, Linux developers and audio engineers struggled with "broken" audio (headphone jack detection, static noise, and input gain) because the official datasheets omitted critical programming sequences known as "Vendor Specific Coefficients." The "fix" was not an official errata, but a reverse-engineering effort by the open-source community.
It is highly probable that is a misinterpretation of CS51983 or a confusion with Cortex-M3 part numbers (which often follow similar naming conventions).