BSS Audio DPR-504 Owner's Manual - Manual (Page 4)

4
Introduction
1.0 Introduction
The BSS DPR 504 is a four channel professional noise gate which has been
designed for simple and intuitive use, and yet is capable of producing the best
results in a wide range of applications. It incorporates modern integrated
circuit technology for high packing density and long term reliability. Some of
the more advanced features within the product are not necessarily obvious
from the front panel, and to ensure the unit is used to its fullest, it is
recommended that the manual is read thoroughly.
Ingenious proprietary techniques are employed to make the engineers life
easier without compromise to performance or versatility. A summary of its
features are highlighted below, with a more in depth discussion following
within the manual.
• Four independent channels that are linkable to give either one or two stereo
linked master/slave modes.
• Flexible parametric Key filter for frequency conscious gating with absolute
precision. The parametric EQ approach provides a higher degree of control for
accurately rejecting spurious unwanted gate triggers than similar shelving
filters.
• Key listen provides operator with the facility to hear the effect of Key side-
chain EQ or other processing effect as an aid to setting up.
• Dual metering system which indicates both average and peak responses
simultaneously and gives the operator precise information regarding the signal
levels around the threshold point. Separate 'gate open' marker LED, linked to
gate dynamics, continually monitors interrelation between gate activity and
the actual signal.
• IN switch which allows the operator to force open the gate, in the absence
of signal, to check the integrity of the signal lines, and observe set dynamics.
This also functions as channel bypass.
• Selectable 'Fast and auto' attack modes which have been optimised for
accurate and transparent performance over the widest variety of program
material. Self adjusting Auto mode deals cleanly with varying dynamics
whilst a super fast mode is available for demanding percussion and
synthesizer transients.
• Simple to operate, combined Hold and Release control which has special
audio-tapered characteristics to give subtle 'musical' envelope shaping.
• Rear mounted electronically balanced XLR input and output connectors.
• Rear mounted 1/4" jack socket allows access to external side-chain key
input for uses such as external EQ, delay or keying by and unrelated signal.