Using a Recorder Effect on a Bus

Question

Hi,

 

We have setup a couple of recorder effects to output the game audio recorded for each bus, however, when the wav files a written they are always malformed, there is data but the wav files cannot be opened in any audio application. The documentation suggests:

"It can also be applied to a bus, which implies that it will not output the file until the bus is unloaded"

we are shutting down the audio engine correctly and have tried a few different approaches but what does "bus is unloaded" mean in terms of the api, I cannot see any api functions for unloading bus', we have tried stopping all audio on those bus' to no effect.

How can we shutdown the audio system / recording of the bus correctly in order to finish writing the wav files correctly?