dbx 122 - Page 36

B E F
Record
Signa!
Pre-Emphasis
Overall
Record
Processing
(Encode)
Response
Play
Signal
De-Emphasis
35
Drr-2IeHe
BANDPASS
PUTER
2 Reconn
PLAY LEVEL
2a
ans
OETECTOR
6A
DETECTOR
BANDPASS.
fxLTER
5K 10K 20K
dotted line - disc
solid line - tape
SK 10K 20K —20 20 50 100 500 1K 5K 10K 20K
signal
swept
across
the
audible
spectrum),
this
is
what
the
dbx
play
H.
Combined
Encode
and
Decode
Response
output
will
do.
Note
that
the
overall
encode
and
decode
response
This
is
the
combined
effect
of
encoding
and
decoding.
The
curve
(curve
H)
is
essentially
flat,
a
combination
of
the
PLAY
and
shows
that
the
net
result
of
dbx
Processing
does
not
change
the
RECORD
response
(curve
E
plus
curve
G).
frequency
content
of
the
program.
The
only
thing
missing
is
the
noise
and
much
of
the
distortion
that
would
otherwise
be
intro-
duced
as
a
result
of
the
tape
recording
process.
(Note:
Play
curve’s
vertical
scale
is
corrected
for
the
1:2
expansion
factor.)