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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, 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)
References in periodicals archive ?
The campaign will run from January 1 2016 to February 1 2016 and will unveil one impossible deal everyday throughout the DSF month.
But retailers reserve the best deals and discounts for DSF as it is the biggest of them all," says Kabir Malkani, head of marketing at Lamcy Plaza and Arabian Center.
On the occasion, Laila Mohammad Suhail, CEO of Dubai Festivals and Retail Establishment (DFRE), delivered a speech on the success of DSF and how it became an icon for festivals in the region and world.
MENA, said, "Visa has been the official payments partner of DSF since it began in 1996 and we are pround to once again be at the very heart of the festival's milestone 20th anniversary edition with a refreshing new concept to reward Visa cardholders.
As per to the tender document, the new DSF will be open to central government departments, related arm's length and non departmental public bodies, as well as NHS and local authorities to obtain access to agile project services including software engineering and support, product manager skills and quality assurance.
The community will become part of the DSF signature Halstead brand including best of class amenities, new cutting edge technology and enhanced resident services.
Unveiling the DSF 2014 Calendar of Events, Laila Mohammed Suhail, CEO, Dubai Festivals and Retail Establishment, an agency of Dubai's Department of Tourism and Commerce Marketing, and the organisers of the annual DSF, said: "With all eyes on Dubai post Expo 2020 win, we are fully aware that we have to rise up to the expectations as DSF 2014 is the first festival after the announcement.
My list is too long, too negative -- having lived through every since DSF -- I can say that they are nothing like they used to be -- the offers aren't as strong, the activities are too widespread -- DSF has become too 'posh' IMHO, and don't get me started on the GV
The participation in WTM is part of DSF Office's efforts in highlighting the upcoming and a landmark 15th edition of DSF, and to promote the festival as one among the world's leading shopping and family entertainment events to a wider global audience.
While the global theme of 'One World One Family One Festival' will be predominant in DSF 2008 as in previous editions.
The DSF delegation, headed by Laila Suhail, Chief Strategy Officer at the DSF Office, will highlight the main features of the upcoming 13th edition of the festival that will be held between 24th January and 24th February, 2008.
Specifically, they argued that, under the statute, DSF stares is elective.