iPad Photos

Did you mark the library as the System Photo Library?

In Photos > Preferences... > General, is the "Use as System Photo Library" button dimmed?

If it is not dimmed, click it, which should make it dim.

I'm not sure what "When the iPad looks for the photos it shows the exact location but the library is grayed out" means.

Are you using the Finder to sync photos to the iPad? The Finder will know where to find library because it is marked as the System Photo Library.

What system is running on your new iMac?

How did you transfer your photos to the new iMac?

Did you transfer them into the Photos library, into Finder folders, or somewhere else?

Where are you looking when you expect to see your Photos library?

Sorry, no. I'm more a Photos and iOS/iPadOS guy than an audio guy.

I have seen a few reports in these forums by people having trouble getting SoundCheck to work on recent iPadOS versions. Which version are you running?

You should probably start a new thread here with a title more appropriate to the sound problem. That should attract people with more experience with audio issues.