Commodore Plus 4 - High resolution graphics

88 The BASIC Language
The voice setting 3 is actually part of voice 2. Voice 3 plays only noise, not
musical notes.
2. The note value can be from 0 to 1023, although each value does not
correspond to a true musical note. The following note chart shows the values for
playing actual notes in four octaves. Middle G is 596. See Appendix F and
Chapter 3 for more information.
A
B
C
D
E
F
G
Low
Octave
7
118
169
262
345
383
453
Middle
Octave
516
571
596
643
685
704
739
High
Octave
770
798
810
834
854
864
881
Highest
Octave
897
911
917
929
939
944
953
3. The duration tells the computer how long to play the sound. Duration can
have a value from 0 to 65535. A value of 1 equals 1 / 60th of a second, so 60 equals
one second. A value of 0 immediately cuts off the current sound for that voice.
Examples: 10 VOL 7
15 REM PLAY A TWO-VOICE HARMONY
20 SOUND 1, 516, 60
30 SOUTH) 2, 345, 60
40 SOUND 1, 643, 60
50 SOUND 2, 262, 60
60 SOUND 1,739, 60
70 SOUND 2, 262, 60
NEW
10 VOL 7
15 REM PLAY A RANGE OP NOISE
20 FOR X = 600 TO 940 STEP 17
30 SOUND 3, X, 15
40 NEXT
SPC Abbr. sP
SPC (number)
Adds spaces to data output to a printer or to a file on disk or tape. SPC adds the
specified number of spaces from the end of the previous PRINT item to the
beginning of the next item. The number in parentheses can be from 0 to 255.