In Windows Device Manager, locate Universal Serial Bus controllers , right-click your USB Root Hub, select Properties , go to Power Management , and uncheck "Allow the computer to turn off this device to save power."
ensures the system automatically switches to the DAC upon plugging it in. Static/Hiss Prevention:
Typically 65mW @ 32Ω (approx. 1Vrms). Total Harmonic Distortion (THD+N): 0.0003% (-95dB). "Fixes" & Performance Optimizations
Check both boxes under to allow apps like Tidal, Qobuz, or Foobar2000 to control the clock rate directly. Install the Realtek/Conexant ASIO Driver cx31993 datasheet fix better
: Typically >128dB (chip spec), though implementation results like the JCALLY JM6E report around 117dB. Dynamic Range (DNR) Power Output (Thrust) : Roughly 65mW (often tested at 32Ω). Distortion (THD+N) : ~0.0003% (-95dB). ADC Recording Rate : Supports up to 24-bit / 96kHz for microphone input. Common Implementation & "Fixes"
To trick the chip into delivering its full voltage potential, connect a small 32-ohm dummy load adapter or plug your headphones into the dongle before plugging the dongle into the USB port of your device. This forces the internal firmware to initialize at the correct power configuration.
While you cannot legally download the full from Conexant, you can download the Linux kernel source code . The kernel driver ( sound/usb/quirks.c ) contains the reverse-engineered register map. This is your de facto datasheet. In Windows Device Manager, locate Universal Serial Bus
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.
Supports up to 32-bit / 384kHz PCM audio.
The "CX31993 datasheet fix better" search is not about a single piece of paper. It is a journey of understanding how a $0.50 DAC chip interacts with a complex digital ecosystem. By mastering the (Part 2), upgrading to a dual-chip hardware design (Part 3), and optimizing your system bitrate (Part 4), you can transform a cheap USB-C dongle from a source of frustration into a high-fidelity audio companion that rivals $200 desktop DACs from a decade ago. Total Harmonic Distortion (THD+N): 0
The CX31993 (also known as ) is a high-performance, low-power USB-C DAC/Amp chip widely used in budget audiophile "dongles." It is highly regarded for its 32-bit / 384kHz support and impressive signal-to-noise ratio (SNR) of Concept Kart Key Specifications
| Method | Effort | Accuracy | |--------|--------|----------| | Contact Synaptics (successor) under NDA | High | High | | Reverse engineer via USB sniffer + Linux lsusb -v | Medium | Medium | | Community-collated errata (GitHub) | Low | Low-Medium |
Plug your earphones/headphones into the 3.5mm jack of the dongle first.
External EEPROM (AT24C02) at address 0x50 overrides descriptors. Write this block for custom branding:
Dirt and pocket lint inside your phone or laptop's USB-C port can cause intermittent drops in power, leading to glitching or digital noise.
In Windows Device Manager, locate Universal Serial Bus controllers , right-click your USB Root Hub, select Properties , go to Power Management , and uncheck "Allow the computer to turn off this device to save power."
ensures the system automatically switches to the DAC upon plugging it in. Static/Hiss Prevention:
Typically 65mW @ 32Ω (approx. 1Vrms). Total Harmonic Distortion (THD+N): 0.0003% (-95dB). "Fixes" & Performance Optimizations
Check both boxes under to allow apps like Tidal, Qobuz, or Foobar2000 to control the clock rate directly. Install the Realtek/Conexant ASIO Driver
: Typically >128dB (chip spec), though implementation results like the JCALLY JM6E report around 117dB. Dynamic Range (DNR) Power Output (Thrust) : Roughly 65mW (often tested at 32Ω). Distortion (THD+N) : ~0.0003% (-95dB). ADC Recording Rate : Supports up to 24-bit / 96kHz for microphone input. Common Implementation & "Fixes"
To trick the chip into delivering its full voltage potential, connect a small 32-ohm dummy load adapter or plug your headphones into the dongle before plugging the dongle into the USB port of your device. This forces the internal firmware to initialize at the correct power configuration.
While you cannot legally download the full from Conexant, you can download the Linux kernel source code . The kernel driver ( sound/usb/quirks.c ) contains the reverse-engineered register map. This is your de facto datasheet.
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.
Supports up to 32-bit / 384kHz PCM audio.
The "CX31993 datasheet fix better" search is not about a single piece of paper. It is a journey of understanding how a $0.50 DAC chip interacts with a complex digital ecosystem. By mastering the (Part 2), upgrading to a dual-chip hardware design (Part 3), and optimizing your system bitrate (Part 4), you can transform a cheap USB-C dongle from a source of frustration into a high-fidelity audio companion that rivals $200 desktop DACs from a decade ago.
The CX31993 (also known as ) is a high-performance, low-power USB-C DAC/Amp chip widely used in budget audiophile "dongles." It is highly regarded for its 32-bit / 384kHz support and impressive signal-to-noise ratio (SNR) of Concept Kart Key Specifications
| Method | Effort | Accuracy | |--------|--------|----------| | Contact Synaptics (successor) under NDA | High | High | | Reverse engineer via USB sniffer + Linux lsusb -v | Medium | Medium | | Community-collated errata (GitHub) | Low | Low-Medium |
Plug your earphones/headphones into the 3.5mm jack of the dongle first.
External EEPROM (AT24C02) at address 0x50 overrides descriptors. Write this block for custom branding:
Dirt and pocket lint inside your phone or laptop's USB-C port can cause intermittent drops in power, leading to glitching or digital noise.