ALT-436C: Vari-MU Compressor Plugin by Antelope Audio

The ALT-436C is based on the third revision of the 436, the version that introduced the Threshold and Release Time controls. Antelope Audio describes the original as a less expensive compressor of its time, one that engineers often modified to suit the instruments they worked on.

The developer says the plugin keeps the all-tube character of the hardware. On bass and vocals it is positioned to make the part stand out in the mix. On brass, strings and synths it adds a warm, tube-style polish.

The unit is also described as useful on a mix bus, where it can add cohesion to a mix without pushing it too far toward vintage coloration.

Antelope Audio lists up to 30 dB of thump-free gain reduction as a core feature. The developer also says the plugin keeps a uniform level of reproduced sound, preserves optimum dynamic range and does not cause overmodulation.

These points matter most when you need heavy reduction without audible pumping, or when you want level control that does not squash the dynamics of a performance. The plugin is sold in a native version that runs on Mac or PC without extra hardware.