"...the secret of how to encode a digital signal with analog?"
"Newly developed by Sony, the Vinyl Processor feature recreates via some clever processing, the acoustic phenomenon unique to vinyl playbacks such as the tone-arm resonance, tiny surface noise and the rich sound from the vibration by acoustic feedback from the speakers to the turntable."
Sorry samjit, they got there first.
https://www.porta-fi.com/sony-announces-autumn-update-for-wm-1z-wm-1a-and-zx300/