Hill Audio RPD-2200, User Manual

Page: 7 / 12

PAGE 6
USER MANUAL - RPD2200 COMPRESSOR LIMITER
COMPRESSOR INPUT/OUTPUT meter. This 12-digit LED display reads both the level of the
incoming audio signal and the level at the dynamics processor output. The range is from -30
to +18 dB.
COMPRESSOR IN/OUT meter switch with LED. This selects whether the gain LEDs read the
input signal (switch pressed) or the output signal (switch not pressed). Note: This display is
referenced to the operating level selected with the LEVEL switch on the rear of the unit (-10
dBV or +4 dBu).
COMPRESSOR ENABLE switch with LED. This activates the corresponding compressor chan-
nel. It provides a so-called “hard bypass”, i.e. if it is OUT or the unit is not connected to the
mains, the input jack will be linked directly to the output jack. Usually, this switch is used for
direct A/B comparison between unprocessed and compressed/limited signals.
DYHANCE switch with LED. Activates the dynamic enhancer circuit which allows to dynami-
cally enhance the treble range. Since the bass portions of a music signal often have the high-
est energy yield, they usually are the ones thattrigger the compression process, thus also
reducing the gain of middle to high frequencies. The enhancer controls the compression
process and gradually adds more highs, the stronger the treble range is compressed, so as
to make up for the subjective loss of high-frequency content.
DE-ESSER LEVEL control. The controllable de-esser helps to eliminate hiss noise contained in
the audio signal. This control determines the amount of frequency suppression.
MALE switch with LED. This switch adapts the de-esser to the male (switch pressed) or female
registers (not pressed).
DE-ESSER LEVEL DISPLAY. This LED chain shows the attenuation within a range from +3 to
+12 dB.
DE-ESSER IN/OUT switch with LED. Switches the de-esser on and off. Note: the de-esser is
placed in the side-chain path of the compressor, so it will operate only if the compressor is
active.
LIMITER control. If this control is turned fully to the right, the limiter is switched off. Owing to
its extremely fast “zero” attack, this circuit is capable of limiting signal peaks without any over-
shoot. If the signal is limited for more than 20 ms,the overall gain is reduced for about 1 s to
avoid strong and thus audible limiter effects.Note: If you wish to use the peak limiter as a
protecting device, the LIMITER control and the OUTPUT control in the compressor section
should be set so that the peak limiter responds only rarely or never at all. It should be triggered
by peak signals only. To achieve creative sound effects, on the other hand, you can also inten-
tionally drive the peak limiter into this peak limiting range.
LIMIT LED. This lights up as soon as the limiter is on.
LINK switch with LED. This switch links the channels. In linked mode, dynamics are controlled
by using channel 1 switches and controls, whereby the control signal is derived from the
energy of both side chain channels (true stereo processing). Therefore, all switches and
controls of channel 2 (except for IN/OUT, SC EXT, SC MON, LoCONT, WARMTH, DE-ESSER,
MALE, DYHANCE, I/O METER switches and OUTPUT, DE-ESSER LEVEL) will be disabled when
activating the LINK switch.
POWER switch. Switches the unit on and off. Make sure to switch the unit off when not in use.
26
27
28
29
30
31
32
33
34
35
36
37