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Introduction
1
Introduction
From
all
at
Akai, thank
you
for
purchasing
an Akai
DR4
Hard Disk
Recorder,
and
welcome
to
the exciting
world
of hard disk
recording.
Reading
through
this
manual
will
provide
you
with
a
good
understanding of
what
the
DR4
is all
about.
What
is
the
DR4?
r
If
you
think of a conventional four-trapkrecorder, replace
all
the
analog
circuitry
with
the
latest
digital
audio processing technology,
replace the tape transport
with a hard
disk for near-instant
digital
audio data
access,
you
won't be
far
off the
DR4
concept.
The
following
feature
list
will
fill
you
in
on
the
rest.
The
DR4
uses hard
disks as
its
recording media.
You
can extend
the available
recording time
according
to
your budget by adding
external
hard
disks or
using a
larger internal
hard
disk.
In
addition, the
DR4
provides nonlinear audio playback,
and you
can
specify
edit
points
and
search
and
locate
with
frame
accuracy.
The
DR4
is
not supplied
as
standard with
an
internal
hard
disk
drive.
Use
Akai's
optional
HD240 240MB
internal
hard
disk,
or consult
your Akai
professional dealer
for details
about
other
DR4
compatible hard
disk
drives.
Features
•
4-channel hard
disk
recorder.
•
16-bit linear
PCM
recording.
•
17
channel minutes per
100MB
of hard disk
(fs
@
48
kHz).
•
Up
to
four
units
can be connected
fbriS
l^
channel system.
•
Up
to
seven
SCSI
hard
disks
can be
connected.
•
16-bit
64-times oversampling
A/D
converters.
•
18-bit
8-times
oversampling
D/A
converters.
•
Near-instant data access,
no
time
consuming
rewinds,
etc.
•
Instant
playback
start.
•
Repeat playback with no
gaps.
•
8
direct locate points.
100
stack locate
points.
•
Absolute and
relative
time
modes,
with sync
offset.
•
Beat/tempo
map
for
MIDI
Clock
master
operation.
•
Adjustable
preroll.
•
Varipitch.
•
Punch
in/out includes:
manual, auto
(with
rehearsal),
and
footswitch.
•
Jog/shuttle
wheel
for locating
edits.
•
Edit functions include: copy, copy+insert,
move,
move+insert,
erase, delete,
insert,
and
edit
undo.
•
Balanced
1/4
inch
phone
jack analog
inputs
and
outputs
(44
dB
or-lOdB).
•
XLR
and
RCA/phono
digital
inputs
and
outputs
(AES/EBU
or
S/PDIF).
•
Backup
to
DAT
via
digital
I/O
•
Optional
IB-
1
13M MIDI
Interface for
MIDI
sequencer
synchronization.
•
Optional IB-
1
10D
Digital Interface
allows four channel
playback
&
recording via
digital
I/O.
•
Optional
HD240 240MB
hard disk
can be
installed.
Version
J.
0
5/93
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