3-50 Operation
The multiband compressor/limiter can be operated in five-band or two-band mode. The 5750 controls high
frequencies with distortion-canceled clipping and, in all but 5-band MX presets, with a high frequency limiter as well.
The clipper operates at 256 kHz-sample rate and is fully anti-aliased.
Usually, the gain reduction in band 5 is slaved to the gain reduction in band 4 (as determined by the setting of the
B4 > B5 COUPLE control); these bands are only independent from the viewpoint of the downward expander and
multiband clippers. However, a high frequency limiter causes additional gain reduction in band 5 when band 5
multiband clipping alone would be insufficient to prevent HF distortion. The HF limiter uses a sophisticated analysis
of the signal conditions in the 5750’s clipping system to do this.
Except in MX presets, a clipper, embedded in the crossover, protects bands 1 and 2 from transient overshoot. This
clipper has a shape control, allowing you to vary the “knee” of its input/output transfer curve from hard (0) to soft
(10). Instead of a clipper, MX presets use a sophisticated bass pre-limiter located immediately before the system’s
main distortion-controlled clipper.
In non-MX presets, the multiband compressor/limiter offers look-ahead compression to minimize overshoot and its
associated clipping distortion. This look-ahead functionality can be turned on or off manually, or the 5750’s
speech/music detector can activate it automatically.
The Ultra-low Latency structure does not offer compressor look-ahead.
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