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Primary Source Expander

Dynamics Plugin by Waves
Primary Source Expander
Primary Source Expander by Waves is a Virtual Effect Audio Plugin for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin and an AAX Plugin.
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Mixing live shows is a rollercoaster ride, where things constantly change. Mic bleed could be causing feedback that prevents you from turning up the PA. Or you may constantly need to mute background noise when a singer isn't singing. Or maybe you need excellent isolation with a live multitrack recording.

PSE is the answer to these and other live sound challenges. It's an easy-to-use, optimized expander that solves most issues instantly—and allows you to handle even the toughest bleed problems.


  • Obtain higher mic levels before feedback.
  • Eliminate mic bleed quickly: in most cases just set-and-forget.
  • Reduce phase issues in live recordings.
  • Achieve a more focused stage sound by eliminating mic crosstalk.
  • Improve monitoring for musicians on stage.
  • Not just for live music—ideal for lavaliers and panel discussions.
  • Internal and external sidechain with HP/LP filters.
  • Ducking mode for added precision in complex live scenarios.
  • Release time presets to speed up your process.

{See video at top of page}

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