Echo and Reverberation Filters

Two of the “effects” filters you’ll use most frequently are the Echo and Reverberation filters. You can use reverberation to add the reverberation effects of a particular acoustic space to a sound that was recorded in isolation. Be careful not to add too much reverberation because it muddies the clarity of the sound (especially dialogue) and, more often than not, it can sound artificial. When possible, it’s best to rerecord dialogue in the same, or similar, environment as the original production.

Figure. Filters tab showing the Echo filter controls.
Figure. Filters tab showing the Reverberation filter controls.

Both Echo and Reverberation filter settings are described below.

  • Effect Mix: This slider determines how much of the “dry,” or original, sound from the audio clip is mixed with the affected audio. By keyframing this parameter over time, you can make it sound as if someone were walking from far away in a room (where there would be more reverberation) toward the microphone (where there would be less reverberation the closer they came).
  • Effect Level: This slider defines how loud the reverberation or echo effect is.
  • Brightness: This slider affects the quality of the reverberation or echo. Boosting this parameter makes the effect seem more intense.
  • Feedback: This slider (Echo only) affects how long the echoes produced by the filter last. As they repeat, they’ll interact with themselves to produce a complex series of echo effects.
  • Delay Time: This slider (Echo only) lets you determine the pause, in milliseconds, between each echo. The longer the pause, the bigger the apparent space of the environment.
  • Type: This pop-up menu (Reverberation only) lets you specify the kind of acoustic environment the filter attempts to reproduce.
    Figure. Type pop-up menu showing the acoustic environments provided by the Reverberation filter.