Other - Akai DR4vr Operator's Manual

Other Functions 97
15
Other
Functions
Emphasis
The
emphasis
function can be used
to
de-emphasize
digital
audio recorded on the'DR4vr
before
it
is
output.
The
DR4vr
cannot emphasize incoming
signals.
If
you
are using analog inputs and outputs
only,
you do
not
have
to
worry about
emphasis,
because
all
digital
devices de-emphasize
their digital
audio before
outputting
it
via their
analog
outputs.
The
only
situation
where
it
should be considered
is
when
you
record an
emphasized
digital
signal to the
DR4vr
via
its
digital inputs. In this
case, the
emphasis function should be
turned
on, so that the
audio
is
de-emphasized
before being
output.
If
it
is
not,
you
will notice
a
slight
boosting of frequencies above
3.5
kHz.
Emphasis can be switched on
and
off independently
for
channels
1/2
and
3/4.
Turning
on Emphasis
1
)
Press
the
SUB-MENU
key.
Its
indicator
will flash.
2) Press the
EMPHA
key.
Its
indicator
will light up,
and
the
current emphasis
setting will
appear on
the display.
3}
Use the jog wheel
or
shuttle control to select
an
option.
The
following
table
shows
the four options:
Option Meaning
lSof3Hof
1/2
off,
3/4
off
1/2 on. 3/4
off
1/2
off,
3/4
on
lSon3Hon
1/2 on, 3/4
on
4) Press the STORE/ENT
key.
The new
emphasis
setting will
be
entered.
What
is
Emphasis?
Emphasis
is
a technique
that
was
used
to
improve
the
performance
of
the
first
generation of
A/D
and
D/A
converters:
a
bit
like noise reduction
for digital systems. Converters have
improved
considerably over
the past
few
years,
so emphasis
is
no
longer
used.
It
has
been
included on
the
DR4vr
for situations
where emphasized
digital
audio from
old
digital
master
tapes,
CDs,
etc.,
is
being
recorded.
Note:
If
a
channel
contains both
emphasized and memphasized
data,
it
cannot be played
correctly.
Version 4.0 12/95