MK-609: Bus Compressor and Limiter Plugin by Kiive Audio

The compression section is modeled on the classic 1969 bus compressor sound. Kiive Audio says it can be used for transparent gain control or pushed harder for a more lively, pumping effect.

The unit provides 3 attack modes and 5 ratio settings. A sidechain high-pass filter lets you keep bass-heavy material from triggering the compressor too much, which helps with clean compression on low-end instruments and full mixes.

Because there are two independent channels, you can process two sources with separate settings in the same instance.

MK-609 includes a limiter that the developer positions as the final stage of the dynamics chain. It is intended for smoothing drum transients, controlling bass guitar and taming vocal stacks.

Use it when you need a simple, consistent ceiling on a source rather than detailed shaping, and combine it with the compression section when you want more control over the overall dynamics.

MK-609 is aimed at producers who want a bus-style compressor with a vintage character for drums, bass, vocals and mix buses. It is available for Windows and macOS in VST2, AU and AAX formats, and it is a 64-bit plugin.

The developer lists system requirements that include a 1 GHz dual-core processor and a screen resolution of 1024 x 768 or higher. macOS support starts at OS X 10.7, with macOS 10.14 or higher recommended, and Windows 7 and above is supported.