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A Feedforward Side Chain Limiter/Compressor/De-Esser with Improved Flexibility

A low-cost yet high-performance dual Limiter/Compressor/De-esser package is described, which overcomes most limitations of conventional designs. Main features include: feedforward side chain construction; selectable balanced or single-ended RFI-protected input/output configuration; abrupt de-esser action; user selectable hard or soft-knee compression curves through independent threshold and compression ratio controls that won't fiddle with unit's before threshold gain, so avoiding time-consuming adjustments; a VCA design featuring a consistently high clipping headroom to avoid transient distortion; availability of very fast attack times, important to limiting action; and finally an unconventional dual-link control to allow for unusual applications. Precision, temperature and drift-compensated circuits are used extensively to ensure consistent action in spite of use of standard components. The unit lends itself to partial integration and to application like remote control and multiband compression.

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