Table of Contents
Advertisement
Recording
15
4 Recording
In
this
chapter,
we
explain
how
to
record using
the
DR4. Your
DR4
should
already
have an
optional
hard disk
installed,
so
you have
everything
you
need.
However,
the
hard
disk
must
be
formatted before
use.
See
"Formatting
New
Disks"
on page
50.
Analog
Recording Setup
To
record via the analog
inputs,
you must
select
the
analog
inputs,
then
set
the
sampling
frequency.
Sampling Frequency
It is
important
that
you
set
the
sampling frequency
before
recording.
If
it
is
changed
after
some
material
has
been
recorded,
that
material
will
playback
at
the
wrong
pitch.
The
DR4
can
record
at
any one
of
the three
common
digital
audio sampling
frequencies:
32 kHz,
44.
1
kHz, and 48 kHz.
The
deciding
factors
in
your choice of sampling frequency
are:
application,
required
audio bandwidth,
and
available
hard disk
space.
Some
information about
sampling
frequency,
applications,
and
audio
bandwidth
are
provided below. See
also
"Hard
Disk
Size"
on page
46.
If
you
intend
to
backup
to
DAT,
refer to
your
DAT's
operating
manual
to
see
which
sampling
frequencies
it
can
record
at
via
its
digital inputs.
48 kHz
This frequency
is
supported
by most
professional
digital
audio
equipment and
provides an
audio
bandwidth
of about
22 kHz.
Consumer
type
DAT
and
DCC
recorders
typically
record
at
this
frequency
when
their
analog
inputs are used.
Use
this
frequency
if
you want
the
highest
audio bandwidth. Although, bear
in
mind
that
an expensive sampling frequency conversion
will
be
required before
your
material
can be
transferred to
CD.
*4h4l
1
KcHz
This frequency
is
supported
by most
professional
digital
audio
equipment and
provides
an
audio
bandwidth
of about
20 kHz.
Prerecorded
CDs,
DCC
tapes,
and
MDs
use
this
frequency.
Professional recording studios
that utilize
digital
equipment
typically
use
it.
If
your
DR4
material
is
destined
for distribution
on
CD,
then
it's
best
to
use
this
frequency.
32 kHz
This frequency
is
widely used
for
digital
broadcast
applications
where
a 15
kHz
audio
bandwidth, about
that
of
FM
radio,
is
deemed
acceptable.
It
is
also
used
for
some
DSB
(Digital
Satellite
Broadcasting)
applications.
It
offers the
lowest audio bandwidth, but
the
maximum
recording
time.
It
maybe
useful for projects
where
recording time
takes
precedence over audio
bandwidth.
Version
1.0
5/93
Advertisement
Table of Contents
