• Practical motivations include noise reduction and leakage reduction.
  • Fit tracks together in your mix more easily through cleverly reshaped amplitude envelopes, and supportive gated reverbs and ambience tracks.
  • Feature tracks by extracting exaggerated ambience and artifacts, manipulating timbre, and tremolo.


  • Master the unusual set of parameters and features: Threshold, slope, attack, release, fade, decay, hold, and range.
  • As you learn compression/limiting, you get better at expansion/gating, and vice versa.

from MIX SMART QUICK START: Expansion and Gating {pp. 119}

  • Gateography: Tracks with Gating and Expansion