Junger Audio d06 - Digital Audio Leveler - Manual (Page 12)

2. FUNCTIONAL DESCRIPTION
operation manual d06, chapter 2 - Functional Description - page 6 of 8
The Junger Audio dynamics processors work according to a Multi-loop
principle, operating with an interaction between several frequency linear
control circuits. This is quite different to the popular multiband structure which
changes the sound.
The resulting attack and release times of the Multi-loop system are variable
and adapted to the evolution of the input signal. This allows relatively long
attack times during steady-state signal conditions but also very short attack
times when there are impulsive input transients.
The Multi-loop structure also permits a short time delay between the control
circuit and the gain changing element. The gain control circuit has time to
preview the signal and become active before it reaches the output. This is
particularly important for the limiter, which provides a precisely leveled output
signal absolutely free of overshoots (clipping).
For some of the control parameter it is possible to define a limited range of
time constant values which are allowed for the adaptive dynamic range
algorithms. Inside this range the time constants can be varied by the adaptive
processing. Setting the range of time constant values may be sometimes
useful, to get the best signal processing performance regarding specific
programme material.
Parameter related to the transient response of the control circuit are important
for distortionfree processing. These time constants are allways adaptive
controlled without remarkable limitation of parameter range. This is caused by
the presence of transient pulses in allmost each kind of programme material.
The algorithm has to guarantee best reaction for fast increasing level of
transient signals anytime even if classical music with slow dying out
characteristic is processed. In all cases the attack time of the limiter for very
short transients is zero.
2.4.1
PROGRAM
A A
f
delay
1
1
2
2
n
m
f
Multi - Band Multi - Loop