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(Direct Stream Digital) The sampling technique used in Sony's high-resolution SACD music format. Although SACD discs never took off and new ones are few and far between, the DSD format is used to encode music for high-quality downloads. Increasingly, Blu-ray players and music servers can decode the format. Digital DSD files use DFF and DSF extensions, the latter holding meta-data.

From 44 Thousand to Millions of Samples
For standard CDs, music is digitized 44.1 thousand times per second, producing 16-bit PCM samples. In contrast, DSD uses pulse density modulation (PDM) to encode 2,822,400 1-bit samples per second (64 times the CD sampling rate). Each DSD sample is a 1 or 0 (either up or down from the previous sample). Compared to CDs, DSD boosts frequency response from 20 kHz to 100 kHz and dynamic range from 96 to 120 db. See PCM, PDM and CD.

Even Higher Sampling Rates
No longer confined to a physical disc, DSD resolutions have gone beyond SACD (see table below). The DSD's one-bit sampling generates a very low signal-to-noise ratio, and "noise shaping" shifts the noise to a high frequency that is filtered out before the final output. The advantage to higher sampling is that the noise is spread out over a wider frequency band, and the filtering can be relaxed. High-end DSD players offer multiple filtering modes to accommodate high-res DSD files. See SACD, DSD DAC, DXD, DoP, signal-to-noise ratio and high-resolution audio.
           MultiplesDSD          of CD        Number ofFormat      Samples  ---1-Bit Samples---

 (DSD64)        64    2,822,400 (2.8 MHz)

 (DSD128)      128    5,644,800 (5.6 MHz)

 (DSD256)      256   11,289,600 (11.2 MHz)

 (DSD512)      512   22,579,920 (22.5 MHz)
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References in periodicals archive ?
As per the deal, DFF will introduce start-up members to the in5 platform, where they will be provided with a simplified business set-up, access to creative co-working spaces and specialised state-of-the-art facilities, said a statement from Tecom.
Tecom Group has signed a memorandum of understanding (MoU) with Dubai Future Foundation (DFF) and Dubai Development Authority (DDA) that aims to accelerate the development of Dubai's innovation ecosystem.
Dubai Restaurant Week (DRW) -- an offshoot of DFF --offers bespoke three-course meals at some of the city's top fine dining establishments.
For DFF, the crew has cooked up a new creative venture with six tantalising courses and eccentric displays that define the INKED experience.
The DFF, which will run until March 9, is a citywide culinary celebration that showcases the Emirate's emergence as the gastronomy capital of the Middle East through a packed 17-day programme of food-related events, activities, promotions and appearances by food celebrities.
Dubai Restaurant Week will return from February 21 to March 2 at this year's Dubai Food Festival (DFF).
The designer has two options to implement the FSM: (i) with the use of a binary counter and 4:1 multiplexers; (ii) with DFF and logic gates.
Sheikh Hamdan, also chairman of DFF, made the remarks as he visited Area 2071 at Emirates Towers in Dubai, where he reviewed a number of projects presented by government entities, as part of the Dubai 10X initiative.
Mohammad bin Abdullah Al Gergawi, Minister of Cabinet Affairs and the Future, and Vice Chairman of the Board of Trustees and Managing Director of DFF, said, "The museum will provide visitors the opportunity to experience the future now.
Mohammad bin Abdullah Al Gergawi, Minister of Cabinet Affairs and the Future, and vice chairman of the board of trustees and managing director of DFF, added: "The museum will provide visitors the opportunity to experience the future now.
Saeed Al Falasi, executive director of future platforms at DFF, said the Dubai Future Accelerators programme is an important platform that brings together government entities in Dubai as well as start-ups and well-established global companies to find innovative solutions for current and future challenges, and make use of the latest technological developments around the world.
government entities and projects within the framework of DFF's full commitment