6:
BROADCASTING
in
AM,
FM,
and
TV
broadcasting
applications, the
integral
RF
suppression will
greatly
facilitate installation
of the 622.
The
optional output
transformers
are
particularly
recommended
for stations
with studio
and transmitter
at the
same site.
Normal
precautions regarding
grounding
and shielding
should be followed
when
the
622
is installed.
The 622
is invaluable in the
production
studio. It
can
be used to
"sweeten"
records,
and
to
equalize the
announce
microphone for
maximum punch.
If
sibilance
is a problem, the best
solution is
the use
of
an Orban
Dynamic
Sibi
lance Controller. If
one is unavailable,
tuning
a
622
band to 6kHz,
adjusting
the
BANDWIDTH
close to
approximately
"5",
and turning down
the
EQ
control
as
necessary will help control
sibilance
--
although
at the expense
of vocal
presence.
Use
of narrowband peaking,
and sweeping
can
create
some wild
gimmicks.
However, be
aware that excessive
high frequency
boost
can saturate
the
7.5ips tape
cartridges
usually
used.
This
can be avoided
by
following
the
622
with
the Orban
Stereo
Compressor/Limiter, which
assures clean
carts under
all
EQ
conditions.
The
622
can
also be used to enhance
the
sound
of telephone
calls,
remotes,
satellite
feeds, shortwave
broadcasts,
and network
feeds. The LF
and
HF
bands
may
be used
in their shelving mode (both BANDWIDTHs
at
"10",
LF TUNING
at 20Hz
and HF TUNING
at
20kHz)
to remove
out-of-band
noise. Presence
and intelligibility
can often be enhanced by boosts
in
the
4-5kHz region.
The 622
is a
most effective phone line equalizer.
Unlike
simpler phone
company
equalizers,
the
622's flexibility
can
effectively deal
with
minor response
"glitches".
In the main
studio,
the 622
can be used
to notch
out cart
or tape
machine
motor
hum and ventilation system noise with minimal
effect
on
voice quality.
Use
one
band
for each
major 60Hz harmonic, with
BANDWIDTH
control
adjusted to
"0".
The 622 may also be used in the
AM
program line to equalize the
air
sound,
thus
partially compensating
for
the inadequacies of typical consumer
AM
radios.
A
certain amount of high
frequency boost is essential
to counteract the extremely
rolled-off
performance of such
radios. However,
extreme boosts can cause problems
with
conventional compressors
and limiters
(such as severe pumping, "gulping" on
material
with
large
amounts of high frequency energy, and
audibly obvious de-
essing). Therefore,
for ultimate
performance,
we recommend using the Orban
OPTIMOD-AM,
which is
a
complete signal
processor including adjustable
equalization.
7:
ELECTRONIC
The 622
is a
highly valuable adjunct
to
any
electronic music synthesizer. It is
MUSIC
particularly useful as a formant
filter,
and can be
used as a
resonator to
simulate
certain instrument body sounds.
(If
both channels
of a
622B
are connected in series,
up to eight high
"Q"
resonances
can
be simulated.)
The
synthesist will find
the
more extreme equalization
settings to be particularly
useful in approaching live instrument
sound and getting away
from the raw sound of
typical
synthesizer
systems.
As this whole area is highly specialized,
we will
not explore it further.
We suggest
that the beginner familiarize himself
with
the literature on musical instrument
physics.
12
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