Audio Effects Chain
Audio Effect Inserts
Audio effects apply processing to audio data. Ensure your Inserts are visible.
Depending on your preference for viewing inserts in Mix View or Edit View, you can select the appropriate view options accordingly.
Edit Window View Inserts
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Mix Window View Inserts

Audio Effect Inserts on Instrument Tracks
You’ve already used inserts to add instruments to instrument tracks, but now we are using inserts to process audio that’s already been generated. An instrument track generates audio for the first time, while audio effect inserts process this audio from the second insert slot onwards.
!Instrument Tracks Theory.png
Audio Effect Inserts on Audio Tracks
For audio tracks, the audio data is already generated, so you can add inserts in any slot you prefer.
!audio effect insert on first slot.png
Insert Order
Audio inserts in ProTools are processed from top to bottom. This means the audio is first processed through the topmost insert, and then the output of this insert is passed into the input of the subsequent insert below it.
!signal processing order audio effects.png