[LAU] Random Clicks and Pops with Steinberg UR-22 ?

Hi everybody, i recently dug out my Steinberg UR-22 interface after not using it for several months. During playback, i experience random clicks and pops (s.b. encountered a similar problem with OSX: https://www.steinberg.net/forums/viewtopic.php?f=157&t=92352) They don't seem to be on recordings or bounces, but make me crazy while working with it. At first i thought it was an unfaithful combination of programs, but it happens with simple mplayer playback as well, with or without JACK. I have to add that the clicks sound fairly "analog", not like a "one" sample. Anybody experienced something similar ? Can't remember this happened the last time i used it ... Best, Niklas -- Niklas Reppel www.parkellipsen.de