[Voyage-linux] mpd.conf and DSD files

[Demian Martin]

If you have MPD 17.2 or newer MPD doesn't resample but instead it repackages
the files into PCM frames using DOP when you have the following set:
	dsd_usb 	"yes"		# enables DoP 1.0

It will also package DSD into PCM and send it over spdif (but only up to
192/ DSD64)

If you do not have that set and you do have the sample rate converters
enabled in mpd it will try to convert to PCM on the fly. Its obvious when
this is happening. Any of the following will be true. If you have an Alix or
an Atom processor and sinc_best is selected the system will stall. If
sinc_fastest, it will be noisy (and the Alix will still stall) if you  have
an i5/i7 at better than 2 GHz the processor use will spike near max. It
works but is not really the first choice I think.
        -Demian


> 
> Message: 1
> Date: Thu, 18 Apr 2013 11:05:37 -0400
> From: "Jim Salk" <jsalk at salk.net>
> To: "'Punky Tse'" <punkytse at punknix.com>
> Cc: voyage-linux at voyage.hk
> Subject: Re: [Voyage-linux] mpd.conf and DSD files
> Message-ID: <000001ce3c46$2fce4e70$8f6aeb50$@salk.net>
> Content-Type: text/plain;	charset="us-ascii"
> 
> I just received an Auralic Vega DAC which can handle DSD files.  But when
I
> play them, they are converted to 176.4 which is correct for DSD over PCM.
> Does anyone know if there is a mod available to stream native DSD64 and
> DSD128? Is anyone working on this?
> 
> - Jim
>