bpa wrote:
> Pulseaudio is aimed at mixing outputs so audio outputs can be shared -
> so it'll probably mangle your bit stream in order to share.
>
> I don;t know DSD but I do know a bit about ALSA.
>
> You are using a Default device. Some class of ALSA devices (e.g plughw)
> will do software conversion to match device and required output - i.e
> mangle the bitstream.
> Since you want to use DSD DAC direct - I think look to using a "hw:"
> ALSA device (i.e. no software conversion within ALSA) for your DAC and
> see if it makes a difference
>
> Do a Squeezelite "-l" to list possible ALSA devices.
Thank you!
Code:
--------------------
squeezelite -l
Output devices:
null - Discard all samples (playback) or generate
zero samples (capture)
default:CARD=sun50ia64audio - sun50i-a64-audio,
1c22c00.dai-sun8i-codec-aif1 sun8i-codec-aif1-0 - Default Audio Device
sysdefault:CARD=sun50ia64audio - sun50i-a64-audio,
1c22c00.dai-sun8i-codec-aif1 sun8i-codec-aif1-0 - Default Audio Device
dmix:CARD=sun50ia64audio,DEV=0 - sun50i-a64-audio,
1c22c00.dai-sun8i-codec-aif1 sun8i-codec-aif1-0 - Direct sample mixing device
dsnoop:CARD=sun50ia64audio,DEV=0 - sun50i-a64-audio,
1c22c00.dai-sun8i-codec-aif1 sun8i-codec-aif1-0 - Direct sample snooping device
hw:CARD=sun50ia64audio,DEV=0 - sun50i-a64-audio,
1c22c00.dai-sun8i-codec-aif1 sun8i-codec-aif1-0 - Direct hardware device
without any conversions
plughw:CARD=sun50ia64audio,DEV=0 - sun50i-a64-audio,
1c22c00.dai-sun8i-codec-aif1 sun8i-codec-aif1-0 - Hardware device with all
software conversions
default:CARD=HIFIRef - HIFI-Ref, USB Audio - Default Audio Device
sysdefault:CARD=HIFIRef - HIFI-Ref, USB Audio - Default Audio Device
front:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - Front speakers
surround21:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - 2.1 Surround output to
Front and Subwoofer speakers
surround40:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - 4.0 Surround output to
Front and Rear speakers
surround41:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - 4.1 Surround output to
Front, Rear and Subwoofer speakers
surround50:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - 5.0 Surround output to
Front, Center and Rear speakers
surround51:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - 5.1 Surround output to
Front, Center, Rear and Subwoofer speakers
surround71:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - 7.1 Surround output to
Front, Center, Side, Rear and Woofer speakers
iec958:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - IEC958 (S/PDIF)
Digital Audio Output
dmix:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - Direct sample mixing
device
dsnoop:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - Direct sample snooping
device
hw:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - Direct hardware device
without any conversions
plughw:CARD=HIFIRef,DEV=0 - HIFI-Ref, USB Audio - Hardware device with
all software conversions
--------------------
I substituted default:CARD=HIFIRef with hw:CARD=HIFIRef,DEV=0 and
restarted squeezelite
Result:
Working for -D : DoP
Working for -D : u32be
both up to DSD 256 (5644k). I thought the DAC also supported DSD512
(native mode only) but so far getting silence for the 512 test track.
DSD 512 is in any case of only academic interest.
Thanks again!
BR.
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