Akai S612 Service Manual page 25

Playback of
Reverse Version
If
you
set the
two
levers
so that the
END
point lever is
positioned
before the START point lever, the
playback
will
be reversed. For
example, as seen
in
the diagram,
when
the set up
is
done
with
the
start
point at the truncating
rear
and
with the
end
point at the
truncating front,
the
reverse version "gninroM dooG"
will
be
played
when
a
key
is
pressed.
It
follows, therefore,
that
it
is
possible
to
replay
any
desired
portion
of
the sample
in
reverse.
Note:
Although the
START and END
point levers
may be
reversed,
it
is
not possible
to
SAMPLE
in
reverse. A
sound can only
be recorded as
it
occurs naturally
(in
its'
original form)
even through, once sampled,
it
can be
reproduced
in reverse.
Scanning
Mode
_ _
The S61 2 employs the latest
computer technology so that
it
is
not only able to play
sampled sounds, but
can
also
be used
very extensively
for
musical application.
The
following are three special scanning
modes:
*
One-Shot
*
Looping
* Alternating
One- Shot
mode
|
In the
"One-Shot" mode,
the
S61 2 functions as an ordinary
sam-
pling
device. For
example,
when
it
is
set as
shown
in the
diagram
(the
same
as the
normal setting), the
sampled sound "Good
Morning"
will
be played
when a key
is
pressed. There
will
be no
sound
thereafter,
even
if
the
key
is
held down.
With the
one-shot mode, scanning
is
done
in
the following
order.
Starting point
—
Ending point
Start-point
End-point
Looping
Mode
In
the LOOPING mode, the setting
up
of
a loop automatically (automatic
splicing system) or
manually (manual splice mode) within the S612's
memory
IC's
makes
it
possible for the
sampled sound
to
be played con-
tinuously.
With
this
mode, playing the
continuous sounds of strings,
brasses, chorus,
etc.,
becomes possible. (The
sound
starts
when a key
is
pressed and
will
play continually
until
the key
is
released.) This
makes
the application of the
S61 2 very extensive
by opening up more
paths for
your musical expression.
Automatic Splicing
System
The
S61 2's looping function
makes
it
feasible,
by
fully
applying today's
computer technology, to
search
out
and automatically "Splice" any point
("Splicing Point") of the
sample instantaneously. This has been said to
be very
difficult
and time
consuming without the aid
of the
computer.
* The term "Splicing"
is
used when
joining
two audio tapes together
with
a special adhesive tape to
make one continuous tape
when
edit-
ing is
necessary. Similarly,
we
call the
restarting point of a scanning
loop
a "Splicing
Point".
The moment
the LOOPING button is
pressed,
the
automatic splicing
system
ot the
S61 2 finds the most
appropriate splicing point
of the
sampled
sound.
For example, as seen in the diagram,
when
the
LOOPING
button
is
pressed,
with the START/END point levers
in
the normal position,
the
key-on (when
a
key
is
pressed)
will
start the
sampled phrase "Good
Morning". After
"Good Morning"
is
played once, "mg" will repeat con-
tinuously until the key-off (the
key
is
released). This
means
that the
S61 2's computer selected
"O" as
the
beat splicing point.
In
the LOOPING mode, the
scanning
is
done
in
the following order:
Starting point
y
Ending point
—
Splicing
point—
Starting point
Ending
point
Note:
The automatic splicing point
is
referenced to the position of
the
END POINT
lever.
Therefore,
if
the sampled sound does not
utilize
all
of the available
memory
the
computer
will
be attempt-
ing to replay (loop)
an "empty 1
'
memory;
=
no sound! This situ-
ation can
be remedied by repositioning
the
END POINT
lever,
making a longer
sample
or, shortening the
sample
time.
Some
sound
will
not loop well.
Sounds which
are not
produced
by musical instruments
(human
voices, effects
and so
on) or,
with erratic or staccato-like
sounds which
contain
much
varia-
tion,
some
noise (splicing noise)
may be
heard. This is not a
defect.
Experimentation
may be necessary
with
some
sounds.
The automatic splicing
system
will
be overridden
if
the
MANUAL
SPLICE
mode
is
selected.
1
Alternating
Mode
The ALTERNATING
mode
is
based
on
the
Same
idea as the
LOOPING mode
where a loop
is built
by scanning. But
it
is different
from
the
LOOPING
mode
in
the
way
the loop
is built.
For example, as
seen
in the diagram,
when the ALTERNATING button
is
pressed,
with the
START/END
point
levers in
the normal position, the
key-on
will start the
sampled phrase
"Good
Morning". After
"Good Morning"
is
played once,
"gni"
then
"ing"
will
be replayed continually until the key-off.
The scanning simply
reverses direction
between the end point and the splicing point.
In
the
LOOPING mode
the
scanning "jumps" back to the splicing point;
scans only
from
the splicing point
to the end point;
does
not
scan
from
the end point to the splicing point.
This difference
in
scanning should be comprehended more easily
in
the
next chapter for "Manual Splice".
In
the ALTERNATING
mode, scanning
is
done
in
the following order:
(Reverse)
Starting point y Ending point
»
Splicing point
Note: The ALTERNATING
mode
is
very useful, especially
when
it
comes
to building
the continuous
sounds
of strings. But there
are
some instances where the
sound produced by
the looping
mode
is
more acceptable.
Compare
the LOOPING
mode
and the
ALTERNATING mode when editing and select the continuous
tone
which sounds
better.
Starling point Ending point