Hi Daniel,
Looking into high end performance I encounter a weird sync issue with Digi connected to a Naim Audio DAC. after a minute into each track there is a short interruption in the playback, the DAC's sync LED goes off, then the music comes back but the DAC stays "out of sync" - I guess that means that it's RAM buffer kicks in.
I tried it with all kernel profiles; various playback configs; 44.1, 48, 96, 192 kHz; 16, 24 and 32 bit. The issue is consistent.
raspberry B+
Hifiberry Digi+
Volumio 1.51
S/PDIF via Toslink
Naim Audio DAC
Date
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5 comments
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k.mattitsch I guess no "sync" led means asynchronous mode.
"Only in rare cases will none of the Naim DAC’s selectable master clocks be closely enough matched to the incoming data rate. To cope with this eventuality we have also implemented, as a backup, an asynchronous sample rate converter (ASRC)."
https://www.naimaudio.com/sites/default/files/products/downloads/files/naim_dac_august_2009.pdf
https://www.naimaudio.com/sites/default/files/products/downloads/files/ndx_white-paper_oct2010.pdf -
HiFiBerry team Hi,
we have seen rare sync problems with some DACs - usually only very old DACs from the 1990s. But maybe your Naim DAC also shows this problem. Did you try the electrical interface too? Is the behaviour the same?
Best regards
Daniel -
k.mattitsch Hi,
so I tried this setting with the electrical interface / coaxial cable - same thing.
I have to say that the DAC (introduced in 2009) stays perfectly synchronised with an iMac (toslink) on all sampling rates up to 96 kHz (iMac's limit).
It looks (to me, a layman) like that the Digi+'s clock is slightly off and forces the DAC to an asynchronous mode after a minute or so.
We are a music loving team here in Vienna building several network players right now with Pi B+ / volumio + crazy power supplies (I mean 3x5V+3V3 with teddyregs) and love the sound we get out of your PCM5122. -
HiFiBerry team Hi,
unfortunately there is nothing we can do about this. With S/PDIF the sender provides the clock and the receiver has to synchronize on it. We can replace the Digi by another board, but there's a good chance that you will see the same behaviour. The other option is to return the Digi.
As we don't own this DAC we can't do any specific tests with it.
Best regards
Daniel -
Patryk B It looks like you're describing the same problem I am experiencing. I am using a Pi3 and Rune Audio. It seems like a Hifiberry Digi+ issue rather than software side of things (I am using Rune Audio + Pi3, you're using Volumio + Pi B+)
@k.mattitsch - have you managed to solve the issue?
Pat
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