Fostex A-2 - Page 12

зестюмв
CREATIVE
USE
OF
THE
PITCH
CONTROL
The
PITCH
control
can
be
used
during
recording
or
playback.
Normally,
these
operations
should
be
done
with
PITCH
centered
for
two
reasons,
(a)
tapes
are
made
at
calibrated
speeds,
and
(b)
the
record/play
equalization
and
the
Dolby
circuitry
are
properly
aligned
only
at
the
normal
running
speed.
There
are
instances
when
different
speeds
are
useful.
RETIMING
На
recording
has
been
made,
say
for
a
60-second
advertise-
ment,
and
the
overall
program
is
a
few
seconds
too
short
or
too
long,
the
PITCH
control
can
be
used
during
remixing
to
adjust
the
overall
play
time.
The
shift
up
or
down
in
the
fre-
quency
of
the
program
should
not
be
disturbing
so
long
as
a
relatively
small
correction
is
used,
say
less
than
5%
(less
than
half
the
maximum
speed
deviation)
A
5%
speed
change
on
a
60
second
tape
wili
add
or
subtract
3
seconds.
In
a
longer
program,
say
a
20
minute
"side"
for
a
record,
à
5%
change
in
length
will
amount
to
a
full
minute.
RETUNING
Suppose the initial track is recorded with the performer out-
of-tune. During subsequent overdubs, it may be impractical
or impossible to re-tune the instruments to match the de-
tuned original track (it would be hard to retune a piano to
match a trumpet whose slide was improperly placed). In this
case, adjust the PITCH control up or down so that the play-
back
pitch
equals
the
pitch
of
the
instrument
which
cannot
be retuned. Then make the overdub at that speed. Subse-
quent overdubs and/or the mixdown can be done either at
standard speed or the modified speed, as desired.
SPEEDING UP A PERFORMANCE WITHOUT
CHANGING THE PITCH
When a performer wishes to play a complex passage at a
tempo
that
would
normally
be
difficult,
if
not
beyond
his
abili-
ty, the PITCH control can be put to good use.
The
technique
is
best
used
during
an
overdub,
where
at
least
one
recorded
track
is
available
for
a
pitch
(frequency)
refer-
ence.
When
making
the
overdub,
set
the
PITCH
control
so
it
slows
down
the
tape
(rotate
CCW).
The
performer
then
plays
in
tempo
with
the
slowed
down
tape.
During
this
operation,
be
sure
the
instrument
is
tuned
to
the
lower
pitch
heard
in
the
monitors.
For
playback,
return
the
PITCH
control
to
the
normal
setting
(centered).
The
overdub
will
now
be
heard
in-tune,
at
normal
pitch,
and
at
a
faster
tempo
than
it
was
actually
performed.