Fuse Audio Labs has released VCL-515, an emulation of a rare late 1960s tube limiter which was a competitor of the classic 438 hardware from the same era. The original was mainly used in broadcast applications and features an optional preamp-card, custom transformers, 6BZ7 vari-mu and 6SN7 output stage triodes and fixed time constants. The VCL-515 plugin adds level compensation, continuous attack and release time and sidechain filter parameters, and a dry/wet mix. It features a rather soft-knee characteristic, quite typical for most vari-mu levelers, but allows to cover a lot of different sonic flavors due to the adjustable attack and release times. Everything from super gritty and smashing to steady and gentle is possible.
Fuse Audio Labs VCL-515 is available now for $59, with an intro price of $29 until May 17. It requires macOS 10.9 or later and an AU, VST, or AAX plugin host.