Chapter
10
I
BASIC Keywords
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Nn
Pn
Tn
MF
MB
MN
Changes the current octave
to
the next higher
octave.
Changes the current octave
to
the next lower
octave.
plays a note.
n
may be in the range
0
to
84. In
the 7 possible octaves, there are 84 notes. Instead
of
specifying the letter and the octave
of
the note,
you may specify its number
1
to 84. Specifying
zero means rest.
rests.
n
may be in the range
1
to
64
and has the
same meaning as
n
with the
L
option.
sets the number
of
quarter notes in
1
minute.
n
may be in the range
of
32
to
255. If you omit
n,
BASIC assumes 120 quarter notes in
1
minute.
That is a moderate tempo. See the SOUND
statement
for
information on beats per minute
for
common tempos.
plays
as
a
dotted note. BASIC plays the note one-
half its length longer. You may use more than
one dot after each note. BASIC scales the length
of
time accordingly.
Dots
may also appear after
the
P
option to scale the length
of
the rest.
plays the music in the foreground, which includes
sounds made by both PLAY and SOUND. This
means that each subsequent note
or
sound does
not start until the previous note
or
sound is fin-
ished. If you omit MF and MB, BASIC assumes
MF.
plays the music in the background, which in-
cludes sounds made by both PLAY and SOUND.
This means that each note or sound is placed in
a
buffer allowing the BASIC program to continue
execution while music plays in the background.
A
maximum
of
32
notes and/or rests can play in
background at a time.
sets “music normal”; each note plays 718
of
the
duration as set by the L option. If you omit MN
and MS, BASIC assumes
MN.
262
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