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Atari XL User Manual

Atari XL
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80 The
Atari
XL
Handbook
4
The
volume
of
the
note
on
that
channel.
A
typical
SO
UND
command
is
:
SOUND
0,126,10,15
where
a
note
of
period
126
is
played
at
volume
15
on
channel
o.
The
distortion
parameter
of
10
specifies
no
distortion
-a
pure
tone
is
played.
Try
the
example,
and
vary
the
parameters
to
get
a
feel for
the
noises
you
can
make.
You
can
stop
a
note
from
sounding
by
pressing
the
RESET
key.
The
SOUND
command
has
the
format:
SOUND
Channel,
Period,
Distortion,
Volume
and
the
four
parameters
work
as
shown
below.
The
numbers
in
brackets
in
the
following
paragraphs
are
the
allowable
range
of
values
for
these
parameters
-
if
you
exceed
them
an
error
message
is
displayed.
CHANNEL
(0-3)
This
determines
which
of
the
four
channels
is
to
be
used.
The
remaining
parameters
in
the
command
pertain
to
that
channel
only,
and
have
no
effect
on
the
other
three
channels.
PERIOD
(0-65535)
This
controls
the
frequency
of
the
tone,
a
low
number
means
a
high
pitched
tone;
a
high
number
means
a
low
tone.
Any
number
up
to
65535
is
allowed,
but
there
are
only
256
different
frequencies
which
means
that
the
the
numbers
0 to
255
represent
all
possible
tones,
with
these
being
repeated
at
higher
values
so
that:

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Atari XL Specifications

General IconGeneral
BrandAtari
ModelXL
CategoryDesktop
LanguageEnglish

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