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RPI 3 playback of multichannel DSD using HDMI

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kolia:
Thanks Awesome Donkey this is a very valuable information. The receiver I have (Emotiva XMC-1) does not support DoP only plain DSD. So unfortunately it will end the search at this time.
However, while it is supported on Windows (if I understand well using ASIO driver as said here: https://wiki.jriver.com/index.php/DSD), is there a chance it will come on the unix platform?

Awesome Donkey:
Native DSD bitstreaming will work with ASIO (assuming there's an ASIO driver supporting your device available - usually USB DACs or sound cards), but again, you won't be getting DSD over HDMI working on a computer.

Native DSD on Linux is possible, but requires a) support for the DSD DAC in the Linux kernel itself (from what I've seen, only specific USB DACs are supported with support for other DACs being added as time goes by), b) A minimum ALSA version which has DSD support (which most up-to-date distros meet this requirement these days) and c) support for native DSD in MC itself. If I recall correctly, Bob was experimenting with this a few months back. But, I can atest that DSD via DoP does work fine in MC for Linux with my DSD USB DAC.

If you want DSD playback from a computer you'll likely need a USB DAC which supports it (and DoP support would be great to have too!).

kolia:
Thanks that's really great info. For my perfect understanding does ASIO implies USB and nothing else?
One other avenue would be then to have XMC-1 supporting DSD over DLNA which has been sort of commited but has not released yet.

Awesome Donkey:
Looking at the manual for your receiver, looks like I was right that it only supports DSD over HDMI from a SACD player (which some players support playback of DXD or DSDIFF files).


--- Quote ---There are a wide variety of disc players which support playback of standard SACD discs (and the
SACD portion of hybrid discs). These discs are recorded in a special digital audio format called
DSD (direct stream digital).
For audio purists who prefer to play the DSD content from SACD discs directly, without
modification or processing, the XMC-1 supports direct playback of DSD audio content received
over an HDMI connection. In order to utilize this feature, your player must be configured to deliver
the unaltered DSD “bitstream” to the XMC-1 via HDMI.
Note: Different players require different settings to enable them to output DSD digital audio
without converting it; and some players may not offer this option. On some players, you will
select “DSD” as your output mode; on some you may select “bitstream” as your output mode
when playing SACDs; and on others you will DISABLE the option “convert SACD output to PCM”;
some players may require you to set multiple options on different menu pages.
Note: Many SACDs include versions of the same content in both Stereo and Surround Sound.
These are actually separate tracks on the disc, and you must choose the one you want when
playing the disc.
Note: Some players can also play DSD audio directly from a DXD or DSDIFF digital audio file. As
long as the result is output to the XMC-1 as standard DSD via HDMI it should play as DSD.
The XMC-1 can play the standard DSD format which is used by SACD discs; it cannot play audio
in the “DSDx2” or “DSD128” format, which is twice the standard SACD sample rate, or any
other non-standard DSD sample rates.
--- End quote ---

Awesome Donkey:

--- Quote from: kolia on November 16, 2017, 05:30:35 am ---Thanks that's really great info. For my perfect understanding does ASIO implies USB and nothing else?
One other avenue would be then to have XMC-1 supporting DSD over DLNA which has been sort of commited but has not released yet.

--- End quote ---

Depending on the DSD-enabled device and what it supports, you can bitstream over USB, AES, Dual AES or SPDIF. Some devices even support DoP over DLNA (DoPE).

But for the "easiest" solution, it's probably better to bitstream DSD from the computer via USB to a USB DAC (which supports DSD) then to whatever output(s) the USB DAC supports, etc.

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