About the [Pre-Sale] Douk Audio U2-PRO-FC XMOS XU316 USB DDC Reclocker-Femtosecond Version
From the product page on doukaudio.com.
Upgrade Your USB Digital Link: Convert USB audio from computers, phones and streamers to optical, coaxial and I2S simultaneous outputs, bringing modern sources to DACs, AV receivers and soundbars without USB input. Femtosecond clocking and dedicated USB-C power raise the performance ceiling for more lifelike playback.
Unlock More with Femto Clocking: Crystek CCHD-957 femtosecond clocking lowers phase noise and jitter beyond standard clocking, bringing firmer imaging, cleaner separation and finer ambience cues. Dedicated USB-C power supports premium or linear supplies, matching precision clocking with an equally serious power foundation.
Unleash Hi-Res with XMOS XU316: Asynchronous USB processing handles PCM up to 32-bit/768kHz and DSD512, delivering high-rate audio for capable DACs with greater clarity and stability. I2S carries the highest rates beyond standard S/PDIF bandwidth, keeping your digital front end from becoming the bottleneck.