Dynamic Processors

CLP260
Professional Stereo Compressor Limiter
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The CLP260 is a Stereo RMS Compressor and Peak Limiter with the addition of an AGC, a 7 bands Eq and a Sub Harmonic Synthesizer.The CLP260 is implementing a REAL RMS Compressor, so compressing at the same threshold a pure sinusoidal signal as a squared wave. Particularly, the RMS Compressor is a Compression process applied with fast slow Attack and Release times to the INPUT signal of a Unit, in order to maintain the amplitude of the OUTPUT signal at a defined level, when input level is exceeding a defined intervention Threshold.

The Compressor implemented in the CLP260 is acting on the evaluation of an input signal which is an averaged one on a 50ms time frame, and representing actually the RMS value of the input signal itself, so to make more “Musical” the Compressors action. The RMS Compressor, it is so maintaining constant the output energy and not the Output peak, so to have for the different inputs, independently from their harmonic content, a constant output RMS level. More, for the CLP260 Compressor is also available a Ratio and a Hard/Soft Knee parameters.
The Ratio parameter is allowing to get a compressed output maintaining a constant dB ratio with the input. This feature is got in the CLP260 with a precise Look Up Table Log Computation process, allowing int the ratio maintenance a precision of 0.1dBu. The Hard and Soft knee feature is allowing the user to select between a sudden compression intervention when the input signal it is just above the Threshold (HardKnee) or a smoother one starting thecompression smoothly before the Threshold.

The AGC is an Expansion/Compression process applied with pretty slow Attack and Release times to the INPUT signal of a Unit, in order to maintain theaverage amplitude of the OUTPUT signal at a defined level, independently from the averaged amplitude of the input sources. For this purpose, the AGC has to be able to expand the input signal, there where the average of the related output signal is below a defined Threshold (Exp Thr), and to maintain the expanded signal at a constant expansion level when the averaged signal is beyond a defined Threshold (Thr Hold). The AGC implemented in the CLP260 is acting on the evaluation of an input signal which is ana averaged one on a 50ms time frame, and representing actually the RMS value of the input signal itself, so to make more “Musical” the AGC action. The Peak Limiter, useful when the CLP260 is used before an amplifier and need to limit the signal for avoiding the amplifier to overload and break cabinets. In addition to the Dynamic Processes, in the CLP260 is also available a powerful SubHarmonic synthesizer.The Sub Harmonic Synthesizer is working generating sub Harmonics on the base on the Harmonic content of the original signal.

Particularly, the amplitude distribution of the generated Sub Harmonics is following the shape of a band pass filter set on the low part of the band. The peak of this “band pass” filter, is centered on 65Hz. This means that the Sub Harmonics added to the original sound, and being at one octave below the harmonics detected in the original signal itself, will bring a “deep” and very low extra body to the original sound.
Finally, in order to “adjust” harmonically the Input signal, a 7 bands Eq. is available, where the first of the 7 filters can be chosen to be 1st/2nd ord. HP or Low Shelving and the other 6 can be chosen to be 1st/2nd ord. High Shelving or Peaking. The CLP260 has a bypass control in the analog domain.
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