I'm finally starting to capture audio data so I can see what happens when a cycle gets lost or added. We lost power for a few seconds yesterday. Here are a few graphs: http://www.megapathdsl.net/~hmurray/time-nuts/line/2012-Aug-06-a0.png http://www.megapathdsl.net/~hmurray/time-nuts/line/2012-Aug-06-a1.png http://www.megapathdsl.net/~hmurray/time-nuts/line/2012-Aug-06-a2.png (The vertical scale is 16 bit audio rather than volts.) I'm seeing glitches like this: http://www.megapathdsl.net/~hmurray/time-nuts/line/2012-Aug-07-a0.png http://www.megapathdsl.net/~hmurray/time-nuts/line/2012-Aug-07-a1.png http://www.megapathdsl.net/~hmurray/time-nuts/line/2012-Aug-07-a2.png The PPS side just keeps ticking along cleanly. I'm guessing ground problems, in part because I'm using the mic input because I can't get the audio mux to switch to line-in. Any Linux audio wizards here? If so, please contact me off-list. -- These are my opinions. I hate spam.