"jonetsu@teksavvy.com": 

Hello,

Suddenly the audio started crackling.  I was listening to a youtube
tutorial (firefox) and it started.  Bitwig and Renoise were running but
not playing anything.  I looked at  the log files (syslog, kern) nothing
relevant.  Card is 10101LT.


Are you running demo versions of the u-he plugins in bitwig or renoise?