Digital eXtreme Definition

Digital eXtreme Definition (DXD) is an audio encoding scheme for professional use that was developed for editing high-resolution recordings because DSD, the audio standard used on Super Audio CD is not ideally suited for editing. DXD is a PCM-like signal with 24-bit resolution sampled at 352.8 kHz – eight times 44.1 kHz, the sampling frequency of Red Book CD. The data rate is 11.2896 Mbit/s – four times that of DSD.

DXD was initially developed for Merging’s Pyramix DSD workstation.