Conexant Cx31993 Driver May 2026

The Conexant CX31993 Driver: Do You Really Need to Install It?

If you’ve recently purchased a modern USB-C dongle DAC (Digital-to-Analog Converter) for your wired headphones, there’s a high chance it contains the Conexant CX31993 chip. It has become the industry standard for affordable, high-quality audio dongles, often competing directly with the Realtek ALC5686.

But one question pops up repeatedly on audiophile forums and Reddit: “Where do I download the driver for the Conexant CX31993?”

The short answer is surprising: You almost certainly don’t need one. Here is everything you need to know about the driver situation for this popular chip.

Frequently Asked Questions (FAQ)

Q: Does the Conexant CX31993 work on Linux? A: Yes, out of the box with the snd-usb-audio kernel module. No driver needed. It supports 384kHz natively via ALSA. conexant cx31993 driver

Q: My dongle gets hot. Is that a driver issue? A: No. The CX31993 is a power-efficient chip, but cheap dongles have poor heat dissipation. The driver does not control temperature. Unplug it when not in use.

Q: Can I use this driver for gaming? A: Yes. However, disable "Audio Enhancements" in Windows and keep the sample rate at 24-bit/48kHz. Spatial sound (Dolby Atmos for Headphones) works perfectly via the driver.

Q: Where is the official download link? A: There is no official public link from Conexant/Synaptics. You must download it from your dongle's brand support page (e.g., Venture Electronics, JCALLY) or a verified community upload. The Conexant CX31993 Driver: Do You Really Need

4.2 Restoring Microphone Functionality

If the microphone is detected but does not pick up sound:

• Check the "Enhancements" tab in Sound Control Panel. Disable all enhancements to rule out software corruption in the DSP (Digital Signal Processor).
• Verify that the driver correctly identified the microphone array geometry (often found in the registry under HKLM\SOFTWARE\Conexant).

3.3 Security and Digital Signatures

In previous years, Conexant drivers were at the center of a significant security vulnerability where the driver installed a root certificate authority (valid for code signing) into the Windows Trusted Root store to bypass driver signing requirements. While patched in newer versions, administrators deploying legacy images must ensure they are not reintroducing this vulnerability.

5. Installation and Troubleshooting Guide (Windows Focus)

Since no custom driver exists, troubleshooting focuses on OS-level fixes. Check the "Enhancements" tab in Sound Control Panel

A. Driver Reinstallation (Forced)

1. Open Device Manager.
2. Locate the device under "Sound, video and game controllers" – typically listed as USB Audio Device or Conexant USB Audio.
3. Right-click → Uninstall device → Check "Delete driver software for this device" (if available).
4. Unplug and re-plug the dongle. Windows will automatically reinstall the native USB Audio 2.0 driver.

B. Resolving No Sound After Sleep

• Control Panel → Power Options → Change plan settings → Change advanced power settings → USB settings → USB selective suspend setting → Set to Disabled.

C. Enabling High-Resolution Output (Windows)

• Sound Control Panel → Playback tab → Select the CX31993 device → Properties → Advanced tab → Select desired shared mode bit depth/sample rate (e.g., 24 bit, 192000 Hz).