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What is Audio Formats DSD 2.8 DSD64 DSD5.6 DSD128 DSD256 DSD512 DSD1024

Audio Basis - educational articles

DSD format - DSD 2.8, DSD64, DSD5.6, DSD128, DSD256, DSD512, DSD1024 - is one of high resolution digital formats audio intended for audiophiles. DSD may be considered as stream of audio data. This stream may be transferred or packed to audio file .dff, .dsf, .iso (a.k.a. SACD ISO - image of SACD audio disk).

Audio Formats DSD 2.8 DSD64 DSD5.6 DSD128 DSD256 DSD512 DSD1024

DSD Features

DSD is one of kind of sigma delta modulation.

There used sample rates that multiple 44100 Hz:

  • DSD 64     : DSD 2.8 MHz   =  2 822 400 Hz = 44100 Hz x 64 times;
  • DSD 128   : DSD 5.6 MHz   =  5 644 800 Hz = 44100 Hz x 128 times;
  • DSD 256   : DSD 11.2 MHz = 11 289 600 Hz = 44100 Hz x 256 times;
  • DSD 512   : DSD 22.6 MHz = 22 579 200 Hz = 44100 Hz x 512 times;
  • DSD 1024 : DSD 45.2 MHz = 45 158 400 Hz = 44100 Hz x 1024 times;
  • etc.

As rule DSD have bit depth 1 bit. Multibit DSD may be used (read below).

 

How to work DSD

DSD assigned for transmitting audio signal in lowest part of frequency range. Rest part of audio spectrum used for modulation noise.

Initially 1-bit signal have high level of noise, comparing transmitted audio signal. Used noise shaping procedure for pushing noise energy to high frequency range. Therefore lowest frequecy range have minimal noise floor.

"Intensive" noise pusing to high frequency range can cause lesses stability of sigma delta modulator.

Bit depth increasing allow to decrease noise level in audio signal band. Hence need "lower intencity" of noise pushing to high frequencies. Hence need lower reserve for noise band at high frequencies. Hence sample rate (total DSD signal band) may be decreased.

 

Tutorial Video: How to work DSD converter

 


Read more

What Inside DSD Converter of Audio Files >

How work sigma delta modulation in audio >

DSD Decoder for Audio >

 

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How to Improve Sound Quality

Tutorials

In this article term "to improve sound quality" mean "to decrease sound playback distortions at analog output of digital-analog converter". How to try to decrease the playback distortions for used equipment or portable device (digital audio player, mobile phone, etc.) will be considered below.

AuI ConverteR 48x44 - Free Music Converter
AuI ConverteR 48x44 - Free Audio Converter

AuI ConverteR 48x44 is pro audio converter of music files DSF, DFF, ISO (1-bit audio), FLAC, WAV, AIFF, m4a, CD-audio, CUE, APE, ogg, mp3. The converter is intended for music production and audiophiles.

AuI ConverteR 48x44 FREE may be used as free audio converter for Windows and Mac OS X. There is professional digital audio processing (altering resolution - sample rate, bit depth and dithering) of audio files is provided.

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