how to get midi note callback played in MusicSegment in Unity?

Question

When MusicSegment (including midi track) is played,
I want to get midi note on number and then control unity game object.

Probably AkCallbackType AK_MIDIEvent is available,
https://www.audiokinetic.com/ja/library/edge/?source=SDK&id=_ak_callback_8h_a948c083ff18dc4c8dfe1d32cb0eb6732.html#a948c083ff18dc4c8dfe1d32cb0eb6732a892b851b9525e6a716cc407493e4fc43
but I can't understand how to write script in unity C# script.
how to use Ak_MIDIEvent callback?

*I already checked lesson 301 below
https://www.audiokinetic.com/ja/courses/wwise301/?source=wwise301&id=Callbacks_on_a_WwiseType_Event_PostWwiseEvent#read