On Sun, 29 Mar 2015, Ben Bell wrote: There is no documentation for jack_control and if I recall jack_control -h or --help do not work either but jack_control on it's own does. I think it is just a python script so looking through the file with an editor or pager would work too. I like jackdbus because the application that starts it is not the only one that can manipulate things in it. I find it very flexable. However using what you are used to is a great idea. You don't need to learn two new things at the same time. I was not aware of that as the delta 66 box does not have a power switch on the breakout box. Actually, it is quite reasonable to expect an external audio IF should be able to be connected or disconnected on the fly... but I think last time I tried that with a USB interface (ALSA driver) things were difficult as well. I was going to ask if you had tried the ALSA FW stack. I do not know enough about fw to say. I don't recall now if you are still using a desktop (as with the d1010s). If so I would try moving the FW interface to different slots to see if this helps. Prioritizing the irq of course helps too, but I am assuming you have already done so. trying 32/3 instead 64/2 or any */3. This is just generally a good idea with any "networked" audio IF such as FW, USB or AoIP. -- Len Ovens www.ovenwerks.net