BSS Audio DPR-402 Owner's Manual - Manual (Page 20)

2 0
This feature of the DPR-402 is provided to overcome some of the settling
problems associated with the attack and release time control features. It is
accessed by switching the released time control to the 'AUTO' position,
whereupon the circuit automatically adjusts itself to provide the required
attack and release time settings, depending on the program type (See figure
10.6).
The circuitry combines a program related attack time setting and a two part
program related release time setting. The two part program dependant release
provides:
A fast release to restore below threshold gain as soon as the transient has
passed.
A much longer following release to avoid rapid gain change effects.
Note that once AUTO time has been selected, the attack control becomes
inoperative.
10.5 AUTO TIME
Fig 10.6 AUTO TIME
control
Because compression is a gain reducing process, the output signal level can
often be lost. The GAIN control is provided to restore this output to normal
operating point, and provides a calibrated range of ±20dB (See figure 10.7).
The facility of gain loss provided by this control can be used, when required,
to restore the compression to a point lower than the input signal (For example,
when connecting this output to a high sensitivity input on a following piece of
equipment).
10.6 GAIN control
Fig 10.7 GAIN control
Compression Controls