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 ML4000 Mastering Limiter by McDSP is a Virtual Effect Audio Plugin. It functions as a VST Plugin, an Audio Units Plugin and an AAX Plugin.
Product ML4000 Mastering Limiter
Developer McDSP
Price (MSRP)
Type / Tags Mastering LimiterDynamics (Compressor / Limiter)ExpanderGateMasteringMastering Buss Compressor
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
Downloads Released
Downloads Released
Miscellaneous Information
Copy ProtectionDongle (PACE iLok Smart Key)

ML4000 is two plug-ins:

  1. ML1 – mastering limiter.
  2. ML4 – multi-band Gate, Expander, and Compressor fed into the ML1 mastering limiter.

The ML1 mastering limiter uses a flexible brick wall look-ahead design coupled with multiple stages of limiting for superior peak detection. The unique Knee and Mode controls allow the ML1 to handle any kind of material with a variety of responses ranging from transparent to aggressive.

The ML4 multi-band dynamics processor includes a 4-band Gate, Expander (upwards or downwards), and Compressor fed into the same limiter algorithm found in the ML1. Each band's Gate, Expander, and Compressor can be configured separately or linked together. Steep 24 dB/Oct crossover filters minimize signal leakage into adjacent bands. Multiple real-time metering options in each band allow quick visualization of all signal dynamics.

The ML4 crossover page shows the overall frequency response in real-time of the input, output, or total dynamics effect, on top of the graphically adjustable crossover frequencies.

Accurate output adjustment is fast and simple with output ceiling control, large meters, and meter level text readouts.


  • Brick wall look-ahead limiter.
  • Multi-stage peak detection and limiting.
  • Unique limiter Knee and Mode controls.
  • Multi-band Gate, Expander (up/down), Compressor.
  • Simultaneous display of Gate, Expander, and Compressor dynamic curves in every band.
  • Multiple real-time metering options.
  • Adjustable crossover filters.
  • Multi-band control linking.
  • Analog Saturation Modeling.
  • Double Precision Processing.
  • Low Latency.
  • Mono and Stereo versions.
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