Try to understand the code above, it's easy to add a gain control with the mouseY.

Use this :

2. float valGain = map(pos_y, 0, height, 6, -48);
3. out.setGain(valGain);

thanks for response. I know i need to spend more time understanding the code, and i have begun going through the programme tutorials. In the meantime, can you help me understand where i should put these 2 line of code? I have tried including it in my original patch but its not working...

 

josh

At present the ellipse takes a constant in Y to be drawn.

When you change the value of this variable (by dragging the ellipse) you change the gain with the two lines of code above.

hi arthur,

 

thanks for info- apprecitae it, thanks for taking teh time to answer my questions.

 

Sorry to ask again, but i am still confused; could you give me a hint as to where in the sequence of code to mpalce thea dditional lines?

 

Cheers,

 

Josh

2. 
   
3. import ddf.minim.*;
4. import ddf.minim.signals.*;
5. 
   
6. Minim minim;
7. AudioOutput out;
8. Oscillator  osc;
9. WaveformRenderer waveform;
10. 
    
11. boolean over = false;
12. boolean selected = false;
13. int posX, posY;
14. int offsetX, offsetY;
15. float radius = 25.0f;
16. 
    
17. void setup()
18. {
19.   size(512, 200);
20.   
21.   minim = new Minim(this);
22.   out = minim.getLineOut();
23.   
24.   // see the example AudioOutput >> SawWaveSignal for more about this class
25.   osc = new SawWave(100, 0.2, out.sampleRate());
26.   // see the example Polyphonic >> addSignal for more about this
27.   out.addSignal(osc);
28.   
29.   waveform = new WaveformRenderer();
30.   // see the example Recordable >> addListener for more about this
31.   out.addListener(waveform); 
32.   
33.   textFont(createFont("SanSerif", 12));
34.   
35.   posX = width/2;
36.   posY = height/2;
37.   smooth();
38. }
39. 
    
40. void draw()
41. {
42.   background(0);
43.   
44.   strokeWeight (1.0f);
45.   fill(255);
46.   
47.   // see waveform.pde for more about this
48.   waveform.draw();
49.   
50.   if ( out.hasControl(Controller.PAN) )
51.   {
52.     // map the mouse position to the range of the pan
53.     float valPan = map(posX, 0, width, -1, 1);
54.     // if a pan control is not available, this will do nothing
55.     out.setPan(valPan); 
56.     
57.     float valGain = map(posY, 0, height, 6, -48);
58.     out.setGain(valGain);
59.     // if a pan control is not available this will report zero
60.     text("pan : " + out.getPan() , 5, 20);
61.     text("gain : " + out.getGain() , 150, 20);
62.     
63.     if (selected)
64.       strokeWeight (2.0f);
65.     
66.     if (over)
67.       fill (255,30);
68.     
69.     ellipse (posX,posY,radius*2.0f,radius*2.0f);
70.   }
71.   else
72.   {
73.     text("The output doesn't have a pan control.", 5, 20);
74.   }
75. }
76. 
    
77. void stop()
78. {
79.   // always close Minim audio classes when you are finished with them
80.   out.close();
81.   minim.stop();
82.   
83.   super.stop();
84. }
85. 
    
86. void mouseMoved() {
87.   over = false;
88.   if (sqrt(sq(mouseX-posX)+sq(mouseY-posY))<=radius) {
89.     over = true;
90.   }
91. }
92. 
    
93. void mousePressed() {
94.   if (over) {
95.     selected = true;
96.     offsetX = posX-mouseX;
97.     offsetY = posY-mouseY;
98.   }
99. }
100. 
     
101. void mouseReleased() {
102.   selected = false;
103. }
104. 
     
105. void mouseDragged() 
106. {
107.   if (selected) {
108.     posX = max(0,min(mouseX+offsetX,width));
109.     posY = max(0,min(mouseY+offsetY,height));
110.   }
111. }