Audio Meter and Side Chaining Tool
Digital Peak Meter Pro - Blue Cat Audio (Blue Cat Audio)
The metering capabilities of the DPMP plug-in let you control and monitor your audio signal exactly the way you want: almost every aspect of the meters can be customized. It now proposes five different scales, including Bob Katz's very popular K-System scales (K-12, K-14, K-16 and also the extra K-10). The graphs show the evolution of the audio envelopes over time, and the mid-side switch lets you verify mono compatibility problems and check the "stereoness" of your audio sources very easily.