Per-frame audio capture in Unity

Question

Hi, I'm currently using a Unity plugin called Flashback that records video frame-by-frame so it can capture the last X seconds of video, but it is not compatible with Wwise. It captures Unity audio every frame using Monobehaviour.OnFilterAudioread (Documentation here), which takes an array of floats and builds a video file by combining that with images recorded from the main camera. Is there any kind of equivalent in Wwise that I can use to mirror this functionality? SoundEngine::StartOutputCapture seems like the closest method, but as we don't know when a user will choose to record from, it is not suitable for our needs.

 

Thanks!