There is no MIDI implementation in Audition CC.
How do I use MIDI in Adobe Audition?
How to Record MIDI in Adobe Audition 2
- Insert a MIDI cable into the "MIDI OUT" jack on your keyboard. ...
- Open Adobe Audition 2. ...
- Click "Insert," and then select "MIDI Track." The new track's controls appear on the left side of the program. ...
- Press the "R" key on your keyboard to arm the sequencer for recording.
Can you play instruments in Adobe Audition?
Adobe Audition 3 is available. Added features include VSTi virtual instrument support with MIDI piano roll; enhanced spectral editing options; fast fade and crossfade controls; and advanced multi-core support. ... It supports VSTi virtual instruments and MIDI piano roll style editing, and provides audio and mixing tools.