dbx 122 - Page 19

18
How to Decode a dbx-Encoded Disc
1. Set the front panel switches as shown below:
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2. Set your preamplifier as follows: TAPE MONITOR
switch to TAPE, and INPUT SELECTOR SWITCH to
PHONO.
3. Play the disc.
Making a dbx-Encoded Tape
1.
Set
the
dbx
unit's
front
panel
switches
as
shown
below:
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dix E imac 122
e 06 Ce
Ax Done neouction svsrew 124
@ 06 pes e
Press REC instead of Play
if 4 channel recording
for
{or
NOTE:
Do
not
change
the
settings
of
the
Noise
Reduc-
tion
switches
while
recording
since
this
would
ruin
your
recording.
CAUTION: Never depress the 122’s REC and PLAY
switches
simultaneously.
Similarly,
never
depress
the
REC
and
PLAY
switches
on
either
pair
of
the
124’s
adjacent
channels
(1
&
3
or
2
&
4).
The
resulting
output
could
damage your sound system.
2. Using an input signal that is similar in level to the
Program
to
be
recorded,
or
using
the
program
itself,
place
your
tape
machine
in
Record
Ready
mode
(PAUSE
mode)
and
set
the
machine’s
recording
level
for
maximum
VU
meter
readings
typically
3
to
6VU
lower
than
normal.
(With
dbx
processing,
significantly
lower
record
levels
are
often
required
to
eliminate
tape
saturation,
particularly
in
cassette
recording.
Experiment
during
initial
setup
to
find
the
appro-
priate
levels.)
These, or even lower recorded levels may be used with
success
because
the
dbx
processing
prevents
audible
tape
noise.
3. Restart the program and start the tape recording. If
your
system
is
set
up
for
off-the-tape
monitoring
with
the
Model
124,
you
can
monitor
the
program
in
decoded
form
while
it
is
being
recorded
by
switching
your
preamplifier’s
TAPE
MONITOR
switch
to
TAPE;
switching
between
SOURCE
and
TAPE
gives
an
“A-B”
comparison
of
original
program to the dbx-processed program.
Playing Back a dbx-Encoded Tape
1. To play back a dbx-encoded tape in decoded form,
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for
Press PLAY instead of REC
if 4 channel playback
2. Place the tape machine in PLAY mode, and your
preamplifier’s
TAPE
MONITOR
Switch
to
TAPE.
Play
the
tape normally.
NOTE: If you listen to an encoded recording without
decoding,
the
sound
will
seem
shrill,
lacking
in
bass,
and
will vary little in loudness. Hiss, hum and other noise will
fill momentary pauses in the music. The unpleasant sound
of
an
encoded
program
is
normal,
but
when
decoded,
the
recording
should
sound
excellent
—
clean,
exciting
music
against a background of silence.