Spdif2 goes to “sleep”

[Jim_2273]

I previously posted a question about my x-SPDIF2 turning itself off after a period of inactivity. I returned the unit to Apos, where I purchased it, and they sent me a replacement. It does the same thing. It goes to sleep, and even when the computer wakes up and I try to select the X-SPDIF2, it remains asleep and is not available in the Mac’s sound menu. So, I plugged the new unit into a different computer, a new Max Mini, via the provided USB cable. It still goes to sleep, but wakes up when the computer wakes up. The new Mac Mini has USB 3.0, hile the old one is USB 2.0. Can this be the reason why the X-SPDIF2 doesn’t wake up?
Thanks.
Jim