Changing iTunes default Library

Willie - Not ALWAYS, but things seems to work pretty consistently for me with
library file stored on external hard drive (along with a copy of the iTunes folder).
I do occasionally have to respond to a popup about BitPerfect or iTunes not being
able to find the library and have to click NEXT on a popup to give permission to
search for the library. Most of the time (8 out of 10?), Bitperfect launches iTunes
and the library comes up without any popups. I do "Quit" out of
iTunes and BitPerfect when shutting down for the evening. Power outages and
especially when the power comes back on are the worst. Sorry I can't be more
helpful.

Ghost - I leave my system on 24/7 so I'm not affected too much with NAS library issues and for the most part it's not a problem, just when I power down

iTunes upgrades also reset the library to the default.

I've searched the web but it appears to be another one of those annoying undocumented "apple standards"

One other thing - do you find there are times when the computer resets the output to its internal speakers?

It happens about 4 days out of 7 (roughly)

I'm using a Schiit Bifrost and it does not need drivers for the Imac, which sees it OK, but it flips back to the internal speakers for no reason.

I'll keep searching and post any results here

Thanks

Willie - on output changing back to internal speakers....YES. Every once in a while, I'll have to reset the output setting either in MIDI or in BitPerfect preferences. Sometimes BitPerfect does not seem to "see" the V-Link 192 or when listening to headphones, the DragonFly. Occasionally the device is not even listed in the Output selection popup and I have to restart BitPerfect and iTunes. Doesn't happen all that often so not that big a deal. Not having much other experience, I just sort of accept this as more or less normal. Let us know if you learn anything. Maybe if you post to Apple support you will learn something.