Specifications

F
I
I
t
t-
I
I
t-
I
t-
I
l-
T
I
I
I
I
I
t
I
t
F
:
RECORDING SOUND
-
Pick-up and
Records
If the
record-player
unit has
a.
tone
control,
set
it
to
the
position
giving
maximun
treble.
The
turntable
speed
must
not
be
allowed
to
vary,
and the
records
r1ust
be
flat and not warped
in
any
way. long playing
recordingi
r"e
partj-cularly
recommended
on
account of
their
low
backgror-rnd
noise.
fhere is
available
a
wide variety
of recordings
of
background
mood
music
for
all
occasions,
and sor-ind
effects
of
all types. Most
eommercial
recordings
are subject,
however,
to
copyrights
(laws
vary from
one
country
to
another)
and
-an only
b6
used
for
commercial
purposes
if
the
consent
of the recordj-ng
company
is obtained..
-
Tape
Recorder
T*: *::l*::-t^:"*
be fitted
with
an adequate
output
socket pernitting
connection
to
UIIY r{rlruu
urlui-lit
of
the
projector
anplifier.
If
the output
impedance
is
high,
the
cable
connecting
the
unit
to
the
projector
amplifier
must
be cirefully
strlefAea
in
order
to avoid
b.uzzirng
noises. If
the
socket for
the
auxiliary
speaker
(1ow
impedance)
is
used
as output
socket,
no
particular
precaution
is
necessarv.-
Recording
by
placing
the microphone
in
front
of the
speaker
of
the tape
recorder
is
not
usuaffy
conducive
to
good
results
and
should
be
used
only
i-f it
is
desired
to
introduce
special
effects
which
were
not
present
on
the
original
souad
track.
A
cathedral-1ike
resonance
effect
or echo
can
be
produced,
foi
insta:rce,
if the
record.-
ing
is
made
in
a
Large
empty roon
with
bare
walls.
The
volume
and
tone
controls
on
the
tape
recorder
should
be
tion
for
pla;'back
(the
tone
contro]
sut to
give
good
treble
be
touched
di:ring
the
recording process.
-
Microphone
set
in
the
normal
nosi-
""
=porr="j
."i- *r"t'"Ji
The
D
11
microphone
rohich
we
recommend
is
characterized
by its
high
sensitivi-ty
an4
excellent
response
at al-f
frequencies
between
50
and
forO00
cyclei
per
second,
sturdy
constrrrction,
sma}l
size and
resistance
to moisture. Omnldirectional
type
microphones
are less
suitable,
because
they
pick
up
backgz'o'.md
noises. In
orOei
to
avoid
the
recording
of
noises
that would
be detrimental
to
the
sould
quality,
the
microphone
shoul-d
not be
set
up too
near
the
projector,
but
at
a distance
oi
several
feet
or,
if
possible'
in
an
adjdlning
room
witn rittre
reverberation.
This
arrange-
ment
requires
the
serwice
of
tlro
persons!
one who onerates
thc nrnio4f,gy
and
the
anplirier
as welt
as the
auxiliarjr
;;;;;";;"(;;;";A-;i;;;";";.;u"iJ"orau"),
and the
other
who
acts
as a
narator.
tj
31