The number 10 produces a pure tone without distortion.
To
put
in
a
little distortion, change the
10 to 06:
SOUND
.1
..
50
..
06
..
8
The computer sounds
as
if it's ready for takeoff. Type
END
before the
neighbors start complaining.
The
la
st number
in
the SOUND command controls the volume. The
number must be between 0 and
15
. Number 8 is a good number for
most uses.
You
risk damaging your
TV
speaker and your ears if you go
above 12.
To try
so
me four-part harmony, enter the following:
SOUND
0
..
50
..
.10
..
8
SOUND
.1
..
.100
..
.10
..
8
SOUND
2
..
.150
..
.10
..
8
SOUND
3
..
200
..
.10
..
8
Type
EN
D to stop the chorus.
Sounding Off with Variables
Variables
in
SOUND commands add versatility to your programs.
Using variables, you can program the computer to change the voice,
pitch, distortion, and volume
of
susta
in
ed
sounds. Enter and run the
following program:
NEW
.10
REM
if
SET
VARIABLES
FOR
SOUND
VALUES
20VOICE=0:PITCH=.100:TONE=8:VOL=8
30
SOUND
VOICE
..
PITCH
..
TONE
..
VOL
40
GOTO
20
RUN
To
stop the sound, press the I Break I key and type END.
To
susta
in
a
sound, you need to repeat the SOUND command
in
the program. Two
common methods are a
FOR-NE
XT loop or a
GO
TO
loop like the one
in
the example above. The following program uses a variable for the
pitch
in
a
FOR-NE
XT loop to produce the computer's entire range of
pitches:
66
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