OK I will rerun and post the results.
I have been doing some investigation and have the following thoughts:
Is it possible that HiFiBerry have changed the DAC that they use on
their boards? I say this because their datasheet for the DAC+ Pro
states the maximum rate supported is 192kHz/24bit, however in the
Squeezelite log file the maximum rate reported by the board is 384kHz:
Code:
--------------------
[00:03:35.184567] output_init_common:422 supported rates: 384000 352800
192000 176400 96000 88200 48000 44100 32000 24000 22500 16000 12000 11025 8000
--------------------
In the HiFiBerry forum, there is a report of a problem that I thought
might be related to my problem but not quite the same:
> 24/192KHZ IS SILENT AFTER LOWER SAMPLE RATE TRACKS IN PLAY QUEUE
> https://support.hifiberry.com/hc/en-us/community/posts/360013951577-24-192KHZ-IS-SILENT-AFTER-LOWER-SAMPLE-RATE-TRACKS-IN-PLAY-QUEUE
The reason I thought it wasn't the same was because the reported problem
only appears after playing a lower sample rate track and mine is
consistent and doesn't require playing a lower bit rate track before
trying to play a 192/24 track. However I have seen in the logs that
when Squeezelite opens the DAC, it specifies a sample rate of 44.1:
Code:
--------------------
00:03:35.222051] alsa_open:422 opened device hw:CARD=sndrpihifiberry using
format: S32_LE sample rate: 44100 mmap: 1
--------------------
and therefore, even if the first track played is 192/24, the card will
have to switch sample rates from 44.1 to 192 and because there are two
clocks on the Pro card, it will also have to switch clocks. The
HifiBerry team have been able to reproduce the problem and state:
> It looks like the DAC chip doesn't switch correctly between external
> clocks if this happens too fast and Roon seems to be the first software
> that seems to be that fast. We should find a way to work around this
> behaviour.
I don't think clock switching can be the whole story, as I am able to
play 24/96 tracks that would also require a clock switch.
I have been having problems signing up to the HiFiBerry forum but I will
post my issue on that thread, once I can find a way to sign up (Firefox
prevents me doing it because it thinks there is a security issue, so I
will try another browser).
------------------------------------------------------------------------
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View this thread: http://forums.slimdevices.com/showthread.php?t=113278
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