The MIDI Target and MIDI Clip Tempo can be defined for either the Music Segment (Parent) or Music Track (Child) in the MIDI tab in Music Segment Property Editor or Music Track Editor.
The MIDI Target is specified as the Sound Object through which all MIDI Events are routed. This property can target a specific Sound Object or a Blend Container including multiple Sound Objects, each with their own individual MIDI properties.
The MIDI Target can be assigned to a Music Segment or Music Track by navigating to a Sound Object through the Project Explorer - Browser or by dragging and dropping a Sound Object from the Actor-Mixer Hierarchy onto the MIDI Target field.
Wwise can use the Tempo map to control the tempo (exported as part of the MIDI file) or use the tempo specification set for the sound object in the Interactive Music Hierarchy.
The imported MIDI tracks use the MIDI Clip Tempo information from the (MIDI) file to control their tempo.
The composition can now be auditioned by selecting the Music Segment in the Interactive Music hierarchy and pressing 'Play' (or Spacebar).