No Worries DK, thanks for your confirmation.
What happens when you insert a BD audio Disc? Is the menu visible on the Oppo, or preferably, on the app? Or do we still need the TV set to display and use the menu.
No, the menu is not visible on neither the Oppo's display nor the app. For disc-based playback, a TV is required to navigate through the menu. For digital file playback, the menu can be accessed via the app and a TV is not required.
Oppo's app works better on an iPhone or Android phone since that is what the app was written for. In order to use the app on my Windows 8.1 tablet, I use an Android emulator called Nox. However, the emulator interface causes some features of the app not to work, such as titles not showing up when a disc is played. Occasionally the app will hang or the app will cause the player to hang when used from a Windows computer.