Commodore 128D - Writing a SOUND Program

Writing a SOUND Program
Now it's time to write your first SOUND program. Here's an example C "*/
of the SOUND statement: LmmJ
10 VOL 5
20 SOUND 1, 4096, 60 _
RUN this program. The Commodore 128 plays a shtprt, high-pitched ^j
beep. You must set the volume before you can play the sound state
ment, so line 10 sets the VOLume of the sound chip. Line 20 plays r~~t
voice 1 at a frequency of 4096 for a duration of 1 second (60 times 1/ *—*
60). Change the frequency with this statement:
30 SOUND 1, 8192, 60 [ !
Notice line 30 plays a higher tone than line 20. This shows the direct ^
relationship between the frequency setting and the actual frequency
of the sound. As you increase the frequency setting, the Commodore r "f
128 increases the pitch of the tone. Now try this statement: <—*
40 SOUND 1, 0, 60
LJ
This shows that a FREQ value of 0 plays the lowest frequency (which f ~')
is so low it is inaudable). A FREQ value of 65535 plays the highest *—>
possible frequency.
Now try placing the sound statement within a FOR... NEXT loop.
This allows you to play the complete range of frequencies within the
loop. Add these statements to your program:
50 FOR I = 1 TO 65535 STEP 100
60 SOUND 1,1,1
70 NEXT
132 USING C128 MODE-Sound and Music in C128 Mode