Best Expander VST Plugins 2025

SSL Sourcerer

SSL Sourcerer 

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Sourcerer by SSL is an expander plugin for reducing mic bleed, click sounds, and other noise from studio/live/location recordings, giving an authentic and clean output without the hassle of EQing and gating the noise. 

SSL Sourcerer

Key Features:

  • Customizations

You can set the plugin to target Peak or RMS loudness ratings of the incoming audio and set the release to medium, fast, or slow, depending on the audio. The plugin also lets you set a Threshold value beyond which the plugin will find noise. Lastly, the Depth knob allows you to set the amount of reduction in decibels. 

  • Sidechain Input Options

You can choose between internal and external sidechain sources for tailored dynamics control. The internal option lets you monitor the sidechain directly for precise processing, while the external source allows you to use other tracks in the mix, enhancing flexibility in managing dynamics and noise reduction.

  • Visual Indicators

With Sourcerer, you can achieve accurate modifications by utilizing the real-time visual cues provided by the dual feedback graphs in SSL Sourcerer. The upper graph illustrates the sidechain and filtered signals, while the lower graph displays the threshold levels and gain reduction metrics.

  • Enhanced Ducking Capabilities

The ducking functionality in the plugin offers improved control for dynamic live environments, particularly during moments of relative quiet, like panel discussions, or when dealing with distracting background noise in live performances. This feature also allows you to adjust the ducking delay, ensuring that the ducking effect aligns seamlessly with the timing of the audio source.

Compatibility:

SSL Sourcerer is compatible with macOS 11 Big Sur – macOS 13 Ventura (64-bit only) (M1 Mac supported) and Windows 10 or later (64-bit only) operating systems with DAWs that support AAX, VST 2/3, and AU plugins.

In terms of system requirements, you need a minimum of 4 GB of RAM minimum (8 GB of RAM recommended) and an Intel Dual-Core Mac or higher or an Intel Core 2 (or comparable) CPU running at 2.4GHz or higher to use this plugin. 

Integraudio
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