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Audio Dropouts with New (2018) Mac Mini [Solved -- Time Machine]
Dennis in FL:
--- Quote from: blgentry on May 18, 2019, 04:52:39 pm ---...and do you get dropouts when running a time machine backup, now that you have your TM drive set up as "true" USB 3?
Brian.
--- End quote ---
Alas, I was testing again with Time Machine on and backups via WiFi instead of USB and I got a dropout. Just one but that's enough. Previously I heard none over maybe an hour of listening with WiFi backups.
So, I am going to temporarily forget about the USB issues (although they are interesting.....I'm still guessing cables)....and now do some extended listening without Time Machine enabled.
Dennis in FL:
--- Quote from: blgentry on May 18, 2019, 04:52:39 pm ---...and do you get dropouts when running a time machine backup, now that you have your TM drive set up as "true" USB 3?
Brian.
--- End quote ---
Even though I still have a couple of drives at USB 2.0 they are both utility drives (they have the original USB 3 cable that came with the drive - but to be safe, I ordered better cables). I have my Time Machine and Music drives on USB 3.0 and have a couple of hours listening with Time Machine ON (backing up to the hard drive) and Time Machine OFF.
So far it's been a clean playback regardless of the Time Machine status.
Paint me cautiously optimistic that it is a cable problem (but I've been here before)
bob:
USB I/O in general can be very touchy, one device on on the same controller as another especially if they are different speeds can cause real issues.
You should try to connect your DAC directly to the Mac (if you aren't already) and use system report try to isolate it to a different controller from the rest of the USB devices.
Note that USB3 will often not work well though a HUB if the cables are not USB3 rated and/or very short.
Dennis in FL:
My DAC is directly connected to the MAC....
My USB 3 Hub is populated with Seagate USB # drives and the cables that came with the drives. I ordered a couple of high quality cables to switch out the drives identifying as 2.0 for some reason. I had been getting drop outs and noticed that my drive used only for Time Machine was showing up in the System Description on the Mac as a USB 2.0. I switched the cable with another drive and it went to 3.0 !!.. but the other drive is now 2.0.
Since then, however, I've had no dropouts in a couple hours of listening..
bob:
Just for reference, in general there will be at least 2 USB controllers in most computers each with a couple of ports.
Trouble can arise (other than cable issues) when mixed speed devices are on the same controller.
Hubs can also cause issues.
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