Another idea on this is to make a view that shows Sample Rate and/or Bit Depth as a top level item. Make a Categories view. Then (for example) set up:
Sample Rate
Album Artist (auto)
Album
Now you'll have a view that starts by showing you Sample rate, then lets you drill down through artist and album. Configure media network to show this in JRemote:
Tools > Options > Media Network > Advanced > Customize views for JRemote
Find your new view and put it into the list on the left so JRemote can see it. Press OK, then restart MC and reconnect with JRemote. You'll now see your new view, that starts with Sample Rate as the first category! You could include bit depth here also. Or set up a second view that shows bit depth first.
Any of these views can be customized to show only certain things. For example, you could have a "24 bit" view that shows only 24 bit music. A high rez view that only shows files at 48kHz or above. Or 88.2kHz or above... or whatever your criteria is.
This is part of the power of JRiver MC: you can set up these views, in a very customized way, and then export them to JRemote for remote control.
Brian.