Tested the 2i4 again here with 3.0.89-rt118 and a variety of
buffer/period setups, no luck: it's happily crackling away.
For anyone interested in a rough impression, I did manage to record
the output for live input this time though (on another box, through a
mixing console, sorry), jackd parameters are in the filename:
http://quitte.de/tmp/2i4-48k-1024x3-crackle.wav (clicks seem to align
to 10ms intervals btw).
jackd still reported no xruns, and the input stream shows no signs of
clicking or crackling.
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