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DSD Decoder for Audio [Article]

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Audio Basis - educational articles

DSD is 1-bit high resolution audio stream. Unlike traditional PCM, DSD has minimal bit depth with higher sample rate and sigma-delta modulated stream. Digital DSD, SACD decoder audio is converter audio stream from DSF, DFF, SACD ISO files to PCM multibit format. The decoder inside like to DSD DAC (digital-analog converter).

What inside DSD decoder

How we note above the decoder inside like to hardware DAC.

DSD digital-analog converter simpler apply than "native" (voltage matrix) PCM decoder. Especially for sample rate 44.1 kHz. The decoder inside has 2 voltage steps (-1 and +1) and less (than PCM's) slope low frequency analog filter.

 

DSD decoder audio

 

Most hard in realization is 44 kHz sample rate filter due steep slope.

Less slope filter for DSD allow simpler achieve less filter's own distortions.

Of course, for resampling DSD to 44.1 kHz here no advantages.

Both these features allow simpler improve quality than for PCM DAC.

As rule now all modern PCM audio DACs have DSD DAC inside.

Decoder DSD to PCM is digital filter, that cut sigma-delta modulation noise and have multibit output.

 

Quality of DSD decoder

Quality of the decoder primarily defined by filter.

Filter has contradictory features:

1. Conversion artefactsand sigma-delta modulation noise supression.

2. Filter's own ringing artefacts.

3. Linearity of phase.

4. Number of calculations (time performance).

5. Precision of calculations.

 

Video: How to work DSD modulator and demodulator

 

Types of DSD decoders

1. Plug-ins and other external connected modules.

2. Modules builtin inside audio software.

 

 

 


Read more about DSD

  1. What is DSD audio >
  2. DSD vs. PCM. Real competitors? >
  3. How work sigma delta modulation in audio >
  4. DSD Converter of Audio Files: What Inside? >
  5. What is Audio Formats DSD 2.8 DSD64 DSD5.6 DSD128 DSD256 DSD512 DSD1024 >
  6. DSD vs DSF vs DFF Files Audio. What is difference >

 

 


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