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RMS 4 band compressor is a multi-band compressor with 4 unique filter bands each with a unique compression curve and setting. The filter bands are configurable allowing the user to adjust the frequencies fed to each compression curve. Each compressor curve is individually configurable by means of a Graph and settings - attack, release hold and knee. The compression is applied by detecting the RMS value of the input signal and multiplying it with corresponding gain as set in the graph.