Commodore Plus 4 - Page 116

Try the following program on your Plus/4:
NEW
10 VOL 7 -*
20 X = 0
30 DO
40 SOUND 1.X.5 "*
50 X - X + 5
60 LOOP UNTIL X - 1020
70
VOL 0 -^
80 END
sets VOlume
plays note
turns off VOLume
—
Type RUN and press RETURN This program allows your PI us'4
to show off some of its musical range.
The third number after the word SOUND controls the duration (length) __i
of the note. This tells the Plus/4 how long to play the note. This number
can be anything from 0 to 65535. This number sets a timer, which
counts time in sixtieths of a second. A duration of 60 keeps the note on
for one second A rule of thumb for duration is the larger the number,
the longer the note stays on. In fact, if you use 65535. the note stays on —■
for over 16 minutes. To turn a sound off, use a zero duration, which
does not allow the sound to be produced.
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