I'm using a type of power strip - UPS (uninterrupted power supply) battery backup - and have the Delta 1010 plugged into a non-power outlet but still surge-protected outlet. It seems like there would be an appropriate order of powering devices on/off. The other day I unplugged the Delta 1010 first and it produced a popping sound. Not cool. I'm figuring this would be a good order to use: 1. "Stop"/"Quit" JACK. 2. Power off the mixer. 3. Unplug/power off the breakout box. I don't know if the power-on order matters as much, perhaps the reverse: 1. Plug in/power on the breakout box. 2. Power on the mixer. 3. Load/"Start" JACK. I'd figure that surge protection reduces the risks with the power source directly though it doesn't necessarily protect additional audio components that are connected to the devices. Better to be safe than sorry. ;-)

On Wednesday 27 January 2010 19:08:05 Ectropic Harmony wrote: Power on should always be from the sound-source to the sink. That is mixer first, then master-effects (if applicable) then amp/PA/Speakers. Power down in the opposite direction. That is speakers/amp first, then the rest. Arnold

fons said: Good info, except in the case of the delta 1010. They have a history of over-heating and drying out the capacitors in the power supply in the external box. I don't have mine hooked up right now, but I used it for years before. We got one just before alsa supported the evny chip that the delta uses*. It was one of the first ones to burn out one of it's power supply caps. After taking it apart, tracing the circuit, understanding the problem, and replacing the caps; I posted info on it here a long time ago. Others have picked the info up, added and distilled it into an easy to understand fix if the caps go bad. If the delta 1010 is getting really hot then leaving the external unit powered on will shorten it's lifetime quite a bit. I ended up mounting a small, quiet, 12v fan behind the external box on it's PS end. The fan was powered by a small 6 volt "wall wart" stile supply that was plugged into the outlet strip that the external box used(along with other sound equipment). *about alsa back then: I was _so_ glad when the delta was finally supported in alsa. I remember downloading and building the drivers for every new kernel that I used. I had wanted to use the oss drivers for the card, but the oss devs seemed to have big money in their eyes; thinking that they could charge big bucks for drivers for the card. What really turned me off was the total cost just to get the 1010 running on linux with their drivers; somewhere very close to what a windows license cost at the time! Now, when I see the oss guy come onto the list defending oss, or badmouthing alsa; I just shake my head and ignor them for introducing such a sad problem into linux so early on. Tracey