1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.AWTEvent;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
public class SoundTemplate4k extends Applet implements Runnable {
private final static int SCREENWIDTH = 600;
private final static int SCREENHEIGHT = 400;
private final static float RATE = 16000f;
private final static float AMPLITUDE = 2048f;
private byte musicLoop[];
private Clip music;
private final static int maxNote = 730;
private final static int length = 1018;
private final static int tempo = 210;
private final static String notes = "[42,#OB+^*(Un6*xG]]#io[%$\\_H]*eG:+#E7i^ W}T7 A'T7 UTR^ o^3^*)(R^ L@%7*/(E7 6@[7 /tx%$DUC^ 0y ,-)(R^ b|l]*0EX[*kKS^ (K;+#L7\\7 L3s]#/(E7 ='a^ #Un6*R<<^ 8%$A[2^*)(R^ S}a^ #Un6*`#5^ 8%$Mxw\\ o;'_ o;'_ rS9^*4L/,-qWf*#?rb<\"E$U%$:cP^*P<<^ .YK_ Aq]^*^#5^ # _ /yD^ 5q]^*IEv^ 1yD^ ll@^*3;2^*%8~] F7i^ qX2N!T#OM!LrXq#*LhR&po{]*+8~] qKF7 QzN]#uVT%$'8~] 7:>] .YK_ Bq]^*rDB7*grZ7 o+q7 g_/&$,q]^*-w%_ ^>[] 7Pp^ <r37*Bj\"^#0@h^ =\"+^*DUC^ 6Z{]*`#5^ oxx<\"_mw\\ 44v\\*jF5,#OB+^*(Un6*xG]]#io[%$\\_H]*eG:+#E7i^ W}T7 A'T7 UTR^ o^3^*)(R^ L@%7*/(E7 6@[7 /tx%$DUC^ 0y ,-)(R^ b|l]*0EX[*kKS^ (K;+#L7\\7 L3s]#/(E7 ='a^ #Un6*R<<^ 8%$A[2^*)(R^ S}a^ #Un6*`#5^ 8%$Mxw\\ o;'_ o;'_ rS9^*4L/,-qWf*#?rb<\"E$U%$:cP^*P<<^ .YK_ Aq]^*^#5^ # _ /yD^ 5q]^*IEv^ 1yD^ ll@^*3;2^*%8~] F7i^ qX2N!T#OM!LrXq#*LhR&po{]*+8~] qKF7 QzN]#uVT%$'8~] 7:>] .YK_ Bq]^*rDB7*grZ7 o+q7 g_/&$,q]^*-w%_ ^>[] 7Pp^ <r37*Bj\"^#0@h^ =\"+^*DUC^ 6Z{]*`#5^ {x^M!tbw\\ 3hE, *HKi -w%_ *$J]*eG:+#E7i^ W}T7 A'T7 UTR^ >X3,#OB+^*(Un6*xG]]#io[%$\\_H]*F7i^ ,HK] L7\\7 L3s]#/(E7 ='a^ s:S\\ fWi^ r*'] kKS^ >An]*\\_H]*l`%7*/(E7 6@[7 /tx%$DUC^ ,xa^ 9M]]#qS:+#F7i^ =\"+^*DUC^ ,xa^ 8M]]#(a2,#]l@^*yl@^*3HK] |\" _ K;u,#LC`6*)1O]#`w^]*tKS^ )+e^*/w%_ vKS^ R?O^*xl@^*ji-^ I'=_ [?O^*xP&^ :Pp^ IG6^ (;2^*%EB7*bYzM!{GeL!*7|y&T2_+#Q}a^ :#`6*c2~] [TE7 p\"D^ O?O^*{*e^*!1-_ +SE] &#r7 v71^#grZ7 btK] I'=_ ]?O^*1\"+^*FUC^ :I(] WZ!&$)(R^ S}a^ 3=eL!Q}a^ $gA<,Ria<\"1RP\\*g3ln7eG:+#E7i^ W}T7 A'T7 UTR^ >X3,#OB+^*(Un6*xG]]#io[%$\\_H]*F7i^ ,HK] L7\\7 L3s]#/(E7 ='a^ s:S\\ fWi^ r*'] kKS^ >An]*\\_H]*l`%7*/(E7 6@[7 /tx%$DUC^ ,xa^ 9M]]#qS:+#F7i^ =\"+^*DUC^ ,xa^ 8M]]#(a2,#]l@^*yl@^*3HK] |\" _ K;u,#LC`6*)1O]#`w^]*tKS^ )+e^*/w%_ vKS^ R?O^*xl@^*ji-^ I'=_ [?O^*xP&^ :Pp^ IG6^ (;2^*%EB7*bYzM!{GeL!*7|y&T2_+#Q}a^ :#`6*c2~] [TE7 p\"D^ O?O^*{*e^*!1-_ +SE] &#r7 v71^#grZ7 btK] I'=_ ]?O^*1\"+^*FUC^ :I(] WZ!&$)(R^ S}a^ 3=eL!Q}a^ zq'M+^iGM!BZl!*SwR, )d;_ Pb|[*";
private final static int TRIANGLEHARMONICS = 7; // Number of harmonics
private final static double TRIANGLEAMPLITUDE = 0.5; // Triangle Volume
private final static double SINAMPLITUDE = 0.2; // Sinewave Volume
private final static int ATTACK = 1000; // Note attack
private final static int DECAY = 1000; // Note decay
@Override
public void start() {
enableEvents(AWTEvent.KEY_EVENT_MASK);
new Thread(this).start();
}
public void run() {
//
// Initialise and start background music
//
// Create array of music frequencies
int i, j, k;
double[] freq = new double[100];
double f = 16.351562; // Frequency of C0 (C4 is middle C)
for (i=0; i<7*12; i++) {
freq[i] = f;
f *= 1.0594630944; // Evenly tempered scale (12th root 2)
}
// Create an array of bytes to store the background music
musicLoop = new byte[2*(int)( length*15f/tempo*RATE )];
// Read each note and render it into the loop
int semiQuaver = 0; // Start time for next note
int byte0, byte1, twoNotes=0;
for (i=0; i<maxNote; i++) {
if ((i & 1)==0) {
// Decode 5 chars to 1 int
twoNotes = 0;
for (j=4;j>=0;j--)
twoNotes = twoNotes*95+(int)notes.charAt(5*(i>>1)+j)-0x20;
}
byte0 = twoNotes & 0xff; // Frequency
byte1 = twoNotes>>8 & 0xff; // Delay & Duration
twoNotes=twoNotes>>16;
double frequency = freq[byte0 & 0x7f];
if (byte0 >127) // If bit7 is set, there is a delay before note
semiQuaver += (byte1>>4 & 0x0f) + 1; // Note start time
int duration = (byte1 & 0x0f) + 1; // Note duration
// Calculate start and stop times in terms of samples
int start = (int)( (semiQuaver)*15f/tempo*RATE );
int stop = (int)( (semiQuaver+duration)*15f/tempo*RATE );
// Calculate each sample and render it into the music loop
double sample;
for (j=start; j<stop; j++) {
double time = (j-start)/RATE; // Time (seconds)
// Triangle fundamental + sinusoidal 4th and 6th harmonics
sample = 0.0;
for (k=1; k<=TRIANGLEHARMONICS; k+=2) {
f = frequency*k;
if (f<RATE/2.0) // Nyquist frequency
sample += Math.sin(Math.PI*f*time*2.0)/(k*k);
}
sample = sample*TRIANGLEAMPLITUDE
+ (Math.sin(Math.PI*frequency*time*8.0)
+ Math.sin(Math.PI*frequency*time*12.0))
* SINAMPLITUDE;
// Apply attack and decay to avoid clicks
if (j-start<ATTACK) sample *= (j-start)/(float)ATTACK;
if (stop-j<DECAY) sample *= (stop-j)/(float)DECAY;
// Add the 16 bit sample to loop
int data = (musicLoop[2*j]<<8)+(musicLoop[2*j+1] & 0xff);
data += (int)(AMPLITUDE*sample);
musicLoop[2*j+1] = (byte)(data & 0xff);
musicLoop[2*j] = (byte)((data>>8) & 0xff);
}
}
try {
// Initialise Sound System
AudioFormat audioFormat = new AudioFormat(RATE, 16, 1, true, true);
DataLine.Info info = new DataLine.Info(Clip.class, audioFormat);
music = (Clip)AudioSystem.getLine(info);
music.open(audioFormat, musicLoop, 0, musicLoop.length);
music.loop(Clip.LOOP_CONTINUOUSLY);
} catch (Exception e) {}
//
// End of Music Section
//
BufferedImage screen = new BufferedImage(
SCREENWIDTH, SCREENHEIGHT, BufferedImage.TYPE_INT_RGB);
while(!isActive()) Thread.yield();
Graphics g = getGraphics();
requestFocus();
do {
if (g!=null) {
g.drawImage(screen, 0,0,null);
}
Thread.yield();
} while (isActive());
music.stop(); // Required to stop music when applet is not in foreground
}
/** Process Key Event */
@Override
protected void processKeyEvent(KeyEvent e) {
// Key Handler ...
}
}
|
