Wwise SDK 2018.1.11
Prepares or unprepares events synchronously (by ID). The Events are identified by their ID (refer to 概説 for a discussion on using strings and IDs). Before invoking PrepareEvent(), use LoadBank() to explicitly load the SoundBank(s) that contain the Events and structures. When a request is posted to the Bank Manager consumer thread, it will resolve all dependencies needed to successfully post the specified Events and load the required loose media files.
The function returns when the request is completely processed.