I 'migh’t be able to help you with the URI…it worked with Sibelius anyway…
I am on Windows, and the Garritan Personal Orchestra 5 library is installed at “%SYSTEMDRIVE%\Program Files\Garritan\Personal Orchestra 5”
Once I get this deep, I’ve decided I want to use the notation variants, so I will go into the “.\Banks\Notation” directory from here.
Using my favorite xml (or text) editor, I’ll open “Personal Orchestra 5.bank.xml”
Be careful, you don’t want to overwrite this file, as tampering with this particular file may be one of the ways that one can break the ‘registration’ for the library.
Look at the bank file though…see the paths for the tags? Maybe this is the information that needs to be passed to ARIA to get it to load instruments?
At least that’s what I used to get Sibelius to auto-load GPO5 stuff. Sibelius also needed a ‘bank’ number…not sure why, but an entry in the soundworld file looks something like this:
<Patch Name="Piccolo Solo Flutter" IsMultipleNoteSample="true">
<AriaPatch Instrument="Notation/01 Woodwinds/01 Flutes/n-Piccolo Solo Flutter" BankID="2013"/>
<SoundID>wind.flutes.flute.piccolo.flutter-tongue.lite</SoundID>
<VolumeType>ModWheel</VolumeType>
<AttackType>NoteOnVelocity</AttackType>
<SwitchType>GPOLegato</SwitchType>
</Patch>
Note the entry…
Maybe this path is what you need?