Commodore 64 User Manual page 174

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TO PLAYA NOTE C C# D D E F F# G G# A A# B C C#
HIGH FREQUENCY 54287 34 36 38 40 43 45 48 51 54 57 61 64 68 72
LOW FREQUENCY 54286 75 85 126 200 52
198 127 97 111 172 126 188 149 169
WAVEFORM
POKE
TRIANGLE SAWTOOTH PULSE NOISE
54290 17 33 65 129
PULSE RATE
HI PULSE 54289 A value of 0 to 15 (for Pulse waveform only)
LO PULSE 54288 A value of 0 to 255 (for Pulse waveform only)
ATTACK/DECAY POKE
ATK4 ATK3 ATK2
ATK1 DECO DEC3
DEC2 DECI
54291 128
64 32
16 8 4
2 1
SUSTAIN / RELEASE
POKE SUS4 SUS3 SUS2
SUS1 REL4 REL3
REL2 REL1
54292 128 64 32 16
8 4 2 1
TRY THESE SETTINGS TO SIMULATE DIFFERENT INSTRUMENTS
Instrument Waveform I
Attack/ Decay I Sustain / Release Pulse Rate
Piano Pulse 9
0 Hi-0, Lo-255
Flute
Triange 96
0 Not applicable
Harpsichord Sawtooth
9 0
Not applicable
Xylophone
Triangle 9
0
Not applicable
Organ
Triangle 0
240
Not applicable
Calliope
Triangle 0
240
Not applicable
Accordion
Triangle
102 0
Not applicable
Trumpet Sawtooth
96
0
Not applicable
MEANINGS OF SOUND TERMS
ADSR-Attovk Decay Sustain Release
Attack-rate sound rises to peak volume
Decoy-rote sound falls from peak volume to Sustain level
Sustain-prolong note at certain volume
Release -rate at which volume falls from Sustain level
Waveform-"shape" of sound wave
Pulse-tone quality of Pulse Waveform
NOTE : Attack/Decay and Sustain/ Release settings should always be POKEd in your program
BEFORE the Waveform is POKEd.
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