TransitionFlaggingMode
Controls when audio elements are converted between main and sub elements. If transition channels are configured, this is the same as routing to main or transition channels.
1: Conversion runs after each change. The button in the control bar is hidden.
2: Conversion must be triggered manually by a click on the button in the control bar.
3: The button in the control bar toggles automatic conversion (like mode 1) on or off; initially automatic conversion is ON.
4: The button in the control bar toggles automatic conversion (like mode 1) on or off; initially automatic conversion is OFF.

Notes:
- In modes 3 and 4, the button indicates the ON or OFF state.
- Depending on whether or not transition channels are configured, the button has different appearance in modes 2, 3, and 4.
Possible values: 1, 2, 3, 4
Default value: 1