That’s insufficient for low noise floor. Use this proven network:

The hiss is amplified circuit noise. This is almost always from the gain being too high for your IEMs—the dreaded "impedance mismatch".

The Conexant CX31993 is a high-performance USB audio codec designed to bring audiophile-grade sound to mobile devices and computers. Its impressive core specifications explain its popularity among budget-conscious audio enthusiasts:

Check both boxes under to allow apps like Tidal, Qobuz, or Foobar2000 to control the clock rate directly. Install the Realtek/Conexant ASIO Driver

, Neutron Music Player , or . These apps bypass the Android system's audio stack and allow you to access the hardware-level volume control of the DAC.

(verified via testing):

Use a 12.5pF crystal (e.g., ECS-.327-12.5-13) with 15pF caps to ground. Avoid 6pF or 9pF types—they cause startup failures or excessive jitter.

Common errata and practical workarounds (examples)

If you have spent any time in budget audiophile circles, you have likely run into the . Often found in $10–$15 dongles like the Abigail or CX-Pro , it is a massive step up from stock laptop or phone soundcards.