Adobe Audition

Audition is an audio editor of its own, so audio moves between Audition and HARP as files.

Send Audio to HARP

1. In the Waveform Editor, select a range and choose File > Save Selection As, which writes it to a new file. In the Multitrack Editor, choose File > Export > Multitrack Mixdown > Time Selection instead.
2. Drag the new file onto an input track of a model in HARP, and select Process.

Bring the Result Back

Drag the output track from HARP onto the Files panel of Audition, which imports it, as File > Import > File does. From there, open it in the Waveform Editor, or drag it into a multitrack session.