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doc/plugins.rst: add DSD spec links

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This commit is contained in:
Max Kellermann 2020-11-10 15:48:47 +01:00
parent c7bd8c663d
commit 8a7986c3bf
2 changed files with 20 additions and 4 deletions
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12
doc/plugins.rst
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@ -378,10 +378,14 @@ flac
Decodes FLAC files using libFLAC. Decodes FLAC files using libFLAC.
.. _decoder_dsdiff:
dsdiff dsdiff
------ ------
Decodes DFF files containing DSDIFF data (e.g. SACD rips). Decodes DSDIFF (`Direct Stream Digital Interchange File Format
<http://www.sonicstudio.com/pdf/dsd/DSDIFF_1.5_Spec.pdf>`_) files
(:file:`*.dff`). These contain :ref:`DSD <dsd>` instead of PCM.
.. list-table:: .. list-table::
:widths: 20 80 :widths: 20 80
@ -392,10 +396,14 @@ Decodes DFF files containing DSDIFF data (e.g. SACD rips).
* - **lsbitfirst yes|no** * - **lsbitfirst yes|no**
- Decode the least significant bit first. Default is no. - Decode the least significant bit first. Default is no.
.. _decoder_dsf:
dsf dsf
--- ---
Decodes DSF files containing DSDIFF data (e.g. SACD rips). Decodes DSF
(<https://dsd-guide.com/sites/default/files/white-papers/DSFFileFormatSpec_E.pdf>)
files (:file:`*.dsf`). These contain :ref:`DSD <dsd>` instead of PCM.
fluidsynth fluidsynth
---------- ----------

12
doc/user.rst
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@ -1032,12 +1032,20 @@ Check list for bit-perfect playback:
:code:`format`, :ref:`audio_output_format <audio_output_format>`). :code:`format`, :ref:`audio_output_format <audio_output_format>`).
* Verify that you are really doing bit-perfect playback using :program:`MPD`'s verbose log and :file:`/proc/asound/card*/pcm*p/sub*/hw_params`. Some DACs can also indicate the audio format. * Verify that you are really doing bit-perfect playback using :program:`MPD`'s verbose log and :file:`/proc/asound/card*/pcm*p/sub*/hw_params`. Some DACs can also indicate the audio format.
.. _dsd:
Direct Stream Digital (DSD) Direct Stream Digital (DSD)
--------------------------- ---------------------------
DSD (`Direct Stream Digital <https://en.wikipedia.org/wiki/Direct_Stream_Digital>`_) is a digital format that stores audio as a sequence of single-bit values at a very high sampling rate. DSD (`Direct Stream Digital
<https://en.wikipedia.org/wiki/Direct_Stream_Digital>`_) is a digital
format that stores audio as a sequence of single-bit values at a very
high sampling rate. It is the sample format used on `Super Audio CDs
<https://en.wikipedia.org/wiki/Super_Audio_CD>`_.
:program:`MPD` understands the file formats dff and dsf. There are three ways to play back DSD: :program:`MPD` understands the file formats :ref:`DSDIFF
<decoder_dsdiff>` and :ref:`DSF <decoder_dsf>`. There are three ways
to play back DSD:
* Native DSD playback. Requires ALSA 1.0.27.1 or later, a sound driver/chip that supports DSD and of course a DAC that supports DSD. * Native DSD playback. Requires ALSA 1.0.27.1 or later, a sound driver/chip that supports DSD and of course a DAC that supports DSD.