Digital eXtreme Definition
Digital eXtreme Definition(DXD) is a digital audio format that originally was developed byPhilipsandMerging Technologies[1]for editing high-resolution recordings recorded inDirect Stream Digital(DSD), the audio standard used onSuper Audio CD(SACD). As the 1-bit DSD format used on SACD is not suitable forediting,alternative formats such as DXD or DSD-Wide[2]must be used during themasteringstage.
In contrast with DSD-Wide or DSD Pure which offers level, EQ, and crossfade edits at the DSD sample rate (64fs,[clarification needed]2.822 MHz),[3][4]DXD is aPCMsignal with 24-bit resolution (8 bits more than the 16 bits used forRed Book CD) sampled at 352.8 kHz – eight times 44.1 kHz, the sampling frequency of Red Book CD. The data rate is 8.4672 Mbit/s per channel – three times that of DSD64. DXD also utilizes the vast array of plugins also available to PCM-based digital audio workstations, such asCubase,Logic Studio,Digital Performer,etc.
DXD was initially developed for the Merging Pyramix workstation and introduced together with their Sphynx 2,[5]AD/DA converter in 2004. This combination meant that it was possible to record and edit directly in DXD, and that the sample only converts toDSDonce before publishing to SACD. This offers a great advantage to the user as the noise created by converting DSD rises dramatically above 20 kHz, and more noise is added each time a signal is converted back to DSD during editing.
Today, DXD is also used as a music distribution format in some HD web stores.[6]
References[edit]
- ^Merging Technologies Sphynx 2https:// resolutionmag /wp-content/uploads/2016/03/Merging-Technologies-Sphynx-2.pdf
- ^Thorpe, Peter (2001),DSD-wide. A practical implementation for professional audio
- ^"Sonoma"(PDF).Archived fromthe original(PDF)on 2019-12-25.
- ^DSD-Wide. A Practical Implementation for Professional Audio. (Audio Engineering Society E-Library)http:// aes.org/e-lib/browse.cfm?elib=9998
- ^Merging Technologies Sphynx 2https:// resolutionmag /wp-content/uploads/2016/03/Merging-Technologies-Sphynx-2.pdf
- ^"Getting started playing DSD and DXD files".help.nativedsd.Retrieved2019-06-07.
External links[edit]
- White paper: The advantages of DXD for SACD
- DSD, DXD & SACD - high resolution audio
- Digital HD Audio Formatsat theWayback Machine(archived 2015-06-21)
- Some DXD samples in flacat theWayback Machine(archived 2019-06-09)
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