I don't know to interpret this, but I have found that I can get fairly
repeatable crackly results on my Vortexbox by stopping squeezelite,
starting it, and then playing tracks.  

Ignoring occasional glitches on starting playing, I get crackle after 7
to 11 minutes, for about 1 minute, which then stops and re-occurs later.
This is true with CD quality, 24/96, FLAC instead of PCM from LMS,
using plughw:... instead of hw:..., and most other variations I have had
time to check.

If I start squeezelite and play nothing for 4 minutes, then play a
track, sure enough after another approximately 8 minutes it usually
crackles.  I haven't repeated this enough times to make sure it's a
reliable measurement, but I will do some more runs.

These results aren't entirely consistent. but around 85-90% of the time
seem to hold true.  I even tried various types of music (piano, choral,
pop etc) to see if the difference balance of sound to silence made a
measurable difference, but it doesn't seem to.

There is nothing on the debug log.

I have repeated some of the tests on my other system and still get no
crackle at all, so the DAC really is OK.

So what does it all mean?


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