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Based on the versatile filtering characteristics of Dolby SR noise reduction, this two-channel dynamic processor allows boosting of low-level signals while leaving high-level signals untouched. Like a magnifying glass for sonic details, the Spectral Processor allows you to tailor your sound like never before. The Dolby 740 processes low-level signals in a side chain, where as much as 20 dB of boost can be added in low-, mid-, and high-frequency bands. The side chain’s signal is then added to th