Processing Forum

"Unitary" - a midi note visualisation sound sculpture

[0 Replies]
- 18-Jun-2013 06:55 AM
- Forum: Share your Work
What it is...

Unitary is a new media artwork and sound sculpture. The work highlights the process whereby media are able to translate abstract representations into lived/visceral/tangible experience. The immediacy of sound and it's physical nature serves to bring the virtual diagrams into non-abstracted perception.

How it works...

The work is realised using a projector, a loudspeaker, a computer running custom developed code (developed with Processing), multiple external code libraries and Ableton Live.

Through the use of Mountain Lion's built in IAC driver and Processing's "The MidiBus" library, the code receives a midi composition (sent from Ableton Live). Each note is respectively visualised as a symbolic representation (that signifies it's pitch, length, and velocity), projected onto the face of the loudspeaker. The note's are given a virtual mass and are added into a simulated physical system, they move intuitively across the face of the loudspeaker according to forces determined by the newtonian physical principles innate in the used Processing physics library "Traer Physics". When a note crosses the event horizon of the speaker cone towards which it is attracted, it begins to sound (through employment of Processing's "Minim" library) and fades away both visually and aurally as it's sound is depleted.

The code can be found here:

https://www.dropbox.com/s/ax0uwpunymor3ne/Unitary.zip

Non-coders can run Unitary as an application (mac only) from here: https://www.dropbox.com/sh/nl6n3b9uxh7spd0/wGdZ_4lK5S

Instructions:

(will be here soon)

Thanks to Processing (processing.org), Minim (code.compartmental.net/tools/minim/), The MidiBus (smallbutdigital.com/themidibus.php), Traer Physics (murderandcreate.com/physics/‎) and Brighton University for making this possible.

For more information...

Feel free to contact me with any enquiries at Absurd.Contact@gmail.com

Drawing Sine Waves Problem

[2 Replies]
- 06-May-2013 06:21 AM
- Forum: Programming Questions
Hello, I can't figure out why this is happening... I'm drawing sine waves based on a frequency but the waves don't seem to properly represent the frequency given. For instance, when I use 100 as the frequency, the waveform drawn appears higher than when I use 440 as the frequency. I'd like nice smooth oscilloscope waveforms ideally, can anybody see what the problem is?
2. int freq;
4. void setup() {
6. size(500, 500);
7. stroke(255);
8. strokeWeight(1);
9. freq = 440;
11. }
13. void draw() {
15. background(0);
16. pushMatrix();
17. translate(width/2, height/2);
18. beginShape();
19. for (int i = 0; i < 100; i++) {
21. vertex(i, sin(i*freq)*20);
23. }
24. endShape(CLOSE);
25. popMatrix();
27. }

Only showing the pixels within two circles of a movie // setting all pixels outside two circles to black

[2 Replies]
- 10-Apr-2013 12:38 PM
- Forum: General Discussion
Hi all!

I am trying to only show the pixels within two given circles. I've seen that I could just make a circular mask if I wanted to black out what is in the circles, but I can't figure out how to do the inverse of this.

Any help would be very gratefully received, Thanks.

Using Minim: How to visualise separate waveforms instead of the main out

[0 Replies]
- 04-Apr-2013 07:04 AM
- Forum: Core Library Questions
Hey all,

Does anybody know how to visualise the sounds of separate wave objects created with Minim? The examples only show how to visualise the main out.

Thanks,

A

Sine wave visualisation phasing issue / digital distortion?

[0 Replies]
- 31-Mar-2013 06:42 PM
- Forum: Contributed Library Questions
Hello all, sorry about the length of this message.

I am working on a patch that receives midi messages (using midiBus) and visualises their pitch + length as sine wave objects that float around (using Traer Physics) being attracted towards mass points. Weird I know, but there's an eventual reason for this that I'll explain if anybody is interested.

I'm not much of a programmer, this project is very much at the limits of my capabilities so I'm certain I'm making mistakes all over the place. Here's my issue, I'd like each sine wave to progress along with its movement and respective frequency, as shown in this code:
2. Wave w1;
4. void setup() {
5. size(500, 500);
6. smooth();
7. w1 = new Wave(20, 80, 0, 0);
10. }
12. void draw() {
13. background(255);
16. translate(width/2, height/2);
18. w1.draw();
20. noFill();
22. }
24. class Wave {
25. float amp, p;
26. float ax, ay;
27. float x1 = 0;
28. public Wave(float amplitude, float pitch, float angX, float angY) {
29. amp = amplitude;
30. p = pitch;
31. ax = angX;
32. ay = angY;
35. }
36. public void draw() {
37. pushMatrix();
40. for (float i = x1; i < x1+50; i += 2/amp) {
41. point(i, sin(TWO_PI * i/p)*amp);
42. }
43. x1++;
44. popMatrix();
45. }
46. }
In my code though, I am encountering a strange effect that I am unsure of the cause of - though I think it might be a phasing issue, or a type of digital distortion? Here is my project, which would require you to set up midiBus and have midi input in order to run. I've also put a video on youtube incase you'd rather not run the project, although the affect isn't really represented fully at all in the video:
http://youtu.be/EpyU-eiWTS4
2. import traer.physics.*;
3. import themidibus.*;
6. // Declarations
8. ParticleSystem physics;
9. Particle f, c, woof, tweet;
10. MidiBus myBus;
11. ArrayList Ons = null;
12. ArrayList Waves = null;
13. float a;
14. int circleRad, wooferPosX, wooferPosY, tweeterPosX, tweeterPosY, tweeterRad, wooferRad;
17. void setup() {
19. size(1000, 750, P2D);
20. frameRate(120);
21. smooth(4);
23. //Default style settings
24. stroke(255);
25. strokeWeight(1);
26. ellipseMode(CENTER);
27. noFill();
29. // Initializations
31. myBus = new MidiBus(this, 0, 7);
32. Ons = new ArrayList();
33. Waves = new ArrayList();
34. wooferPosX = 3*width/4;
35. wooferPosY = height/2;
36. tweeterPosX = width/4;
37. tweeterPosY = height/2;
38. tweeterRad = 100;
39. wooferRad = 200;
40. circleRad = 350;
42. // creating system setup
43. physics = new ParticleSystem(0, 0);
44. f = physics.makeParticle(1, sin(a%TWO_PI)*circleRad+width/2, cos(a%TWO_PI)*circleRad+height/2, 0);
45. c = physics.makeParticle(1, sin(a-PI%TWO_PI)*circleRad+width/2, cos(a-PI%TWO_PI)*circleRad+height/2, 0);
46. woof = physics.makeParticle(1, wooferPosX, wooferPosY, 0);
47. tweet = physics.makeParticle(1, tweeterPosX, tweeterPosY, 0);
48. woof.position().set(wooferPosX, wooferPosY, 0);
49. tweet.position().set(tweeterPosX, tweeterPosY, 0);
51. f.makeFixed();
52. c.makeFixed();
53. woof.makeFixed();
54. tweet.makeFixed();
58. }
60. void draw() {
62. physics.tick();
64. // Scene Settings
65. background(0);
66. strokeWeight(1);
68. //drawing speaker cone circles
69. //tweeter
70. ellipse(tweet.position().x(),tweet.position().y(), tweeterRad, tweeterRad);
71. //woofer
72. ellipse(woof.position().x(),woof.position().y(), wooferRad, wooferRad);
74. //Updating creation + force point positions
76. f.position().set(sin(a%TWO_PI)*circleRad+width/2, cos(a%TWO_PI)*circleRad+height/2, 0);
77. c.position().set(sin(a-PI%TWO_PI)*circleRad+width/2, cos(a-PI%TWO_PI)*circleRad+height/2, 0);
80. //Drawing creation and force point
81. strokeWeight(5);
82. point(f.position().x(), f.position().y());
83. point(c.position().x(), c.position().y());
87. //update and draw all waves
88. for (int i = 0; i < Waves.size(); i++) {
90. Wave w = (Wave)Waves.get(i);
91. w.updateTailPointPosition();
92. w.updateDirections();
93. w.drawWave();
94. }
96. a+=0.01;
97. }
109. //midibus noteOn class for when a note on message is received.
110. void noteOn(int channel, int pitch, int velocity) {
112. int midiChannel = channel;
113. int midiPitch = pitch;
114. int midiVel = velocity;
115. int pointInTime = millis();
116. Ons.add(new On(midiPitch, midiVel, midiChannel, pointInTime));
117. }
120. //midibus noteOff class for when a note off message is received.
121. void noteOff(int channel, int pitch, int velocity) {
123. int midiChannel = channel;
124. int midiPitch = pitch;
125. int midiVel = velocity;
126. int pointInTime = millis();
129. new Off(midiPitch, midiChannel, pointInTime);
130. //println(Ons.size());
131. }
134. class Off{
136. public int channel = -1;
137. public float pitch = -1;
138. public int velocity = -1;
139. public int whenThisHappened = -1;
140. public int timeDifference = -1;
144. Off(int midiPitch, int midiChannel, int pointInTime){
146. pitch = midiPitch;
147. channel = midiChannel;
148. whenThisHappened = pointInTime;
152. // checking for the corresponding note on to this off (i.e. same pitch, waiting for an off)
154. for(int i = 0; i < Ons.size(); i++){
156. On o = (On)Ons.get(i);
157. //getting the note on in question
158. if(o.retrievePitch() == pitch && o.retrieveWaiting() == true){
159. //getting this ons velocity
160. velocity = o.retrieveVelocity();
161. //finding time difference between note off and note on
162. timeDifference = whenThisHappened - o.retrieveWhenThisHappened();
163. //println("this is the time difference: " + timeDifference);
164. o.setWaitingToFalse();
165. Ons.remove(o);
166. Waves.add(new Wave(pitch, velocity, channel, timeDifference));
167. }
168. }
169. }
170. }
173. class On{
175. public int channel = -1;
176. public int pitch = -1;
177. public int velocity = -1;
178. public int whenThisHappened = -1;
179. public boolean waitingForOff = false;
181. On(int midiPitch, int midiVel, int midiChannel, int pointInTime){
183. pitch = midiPitch;
184. velocity = midiVel;
185. channel = midiChannel;
186. whenThisHappened = pointInTime;
187. waitingForOff = true;
190. }
195. public int retrievePitch(){
196. return pitch;
197. }
199. public int retrieveVelocity(){
200. return velocity;
201. }
202. public int retrieveWhenThisHappened(){
203. return whenThisHappened;
204. }
205. public boolean retrieveWaiting(){
206. return waitingForOff;
207. }
208. public void setWaitingToFalse(){
209. waitingForOff = false;
210. }
211. }
214. class Wave{
216. public Particle p1, p2;
217. public PVector directionOfTailPoint, directionOfMovement, unitVector;
218. public float x1;
219. public int channel = -1;
220. public float pitch = -1;
221. public float velocity = -1;
222. public float waveLength = -1;
223. public int distanceBetweenPoints = -1;
224. public int pan = -1;
225. public float waveAngle;
228. Wave(float midiPitch, int midiVel, int midiChannel, int timeDifference){
229. //println(midiPitch);
230. pitch = (pow(2, ((midiPitch-69)/12)))*440.0 ; //converting from midi note to frequency
231. //println(pitch);
232. velocity = map(midiVel, 0, 127, 1, 50);
233. channel = midiChannel;
234. waveLength = timeDifference;
235. x1 = 0.0;
236. unitVector = new PVector(0,-1,0);
237. //println(waveLength);
241. //initialize point position, velocity and attractions
242. p1 = physics.makeParticle(waveLength/25, c.position().x(), c.position().y(), 0);
243. physics.makeAttraction( p1, woof, wooferRad*2, wooferRad);
244. physics.makeAttraction( p1, tweet, tweeterRad*2, tweeterRad);
245. physics.makeAttraction( p1, f, 1000, 30);
247. directionOfTailPoint = new PVector(-1*p1.velocity().x(),-1*p1.velocity().y(),0);
248. directionOfTailPoint.normalize();
250. p2 = physics.makeParticle(waveLength/25, p1.position().x()+(directionOfTailPoint.x*waveLength), p1.position().y()+(directionOfTailPoint.y*waveLength), 0);
251. physics.makeAttraction( p2, woof, wooferRad, wooferRad);
252. physics.makeAttraction( p2, tweet, tweeterRad, tweeterRad);
253. physics.makeAttraction( p2, f, 250, 30);
254. distanceBetweenPoints = (int)dist(p1.position().x(),p1.position().y(),p2.position().x(),p2.position().y());
256. directionOfMovement = new PVector(p1.velocity().x(),p1.velocity().y(),0);
257. waveAngle = PVector.angleBetween(directionOfMovement, unitVector);
259. }
261. void updateDirections(){
262. directionOfTailPoint.set(-1*p1.velocity().x(),-1*p1.velocity().y(),0);
263. directionOfTailPoint.normalize();
264. directionOfMovement.set(p1.velocity().x(),p1.velocity().y(),0);
265. waveAngle = atan2(p1.velocity().y(),p1.velocity().x());
267. //println(waveAngle);
270. }
271. void updateTailPointPosition(){
272. p2.position().set(p1.position().x()+(directionOfTailPoint.x*waveLength), p1.position().y()+(directionOfTailPoint.y*waveLength), 0);
273. }
274. void drawWave(){
276. //guidelines
277. /*
278. stroke(100);
279. strokeWeight(1);
280. line(p1.position().x(),p1.position().y(),p2.position().x(),p2.position().y());
281. stroke(255);
282. strokeWeight(5);
283. point(p1.position().x(),p1.position().y());
284. stroke(255);
285. strokeWeight(3);
286. point(p2.position().x(),p2.position().y());
287. */
288. //wave itself
289. pushMatrix();
290. strokeWeight(2);
291. stroke(255);
292. translate(p1.position().x(),p1.position().y());
293. rotate(waveAngle);
294. for (float i = x1; i < x1+waveLength; i++) {
295. point(i-x1-waveLength, sin(i*pitch)*velocity);
296. }
297. popMatrix();
300. x1+=0.1;
301. println(x1);
302. }
303. }
I'd be really grateful for some help, you can probably tell from the code that this has been a real struggle!

Thanks,

Adam

Edit: I stumbled upon this, which I'm certain holds the solution somewhere http://subversion.assembla.com/svn/portaudio/portaudio/branches/alsa_hw_endian_subdevice/qa/loopback/src/audio_analyzer.c

Sine waves travelling at any angle through 3D space

[11 Replies]
- 26-Mar-2013 03:58 AM
- Forum: Programming Questions
Hello all,

Does anybody know how to code the movement of a sine wave through 3D space? I'd like to have the wave move through space at any definable angle but can't think how to make this happen.

Here is where I'm at so far:
2. float x1 = 0;
4. void setup() {
5. size(500, 500);
6. smooth();
7. }
9. void draw() {
10. background(255);
12. int pitch = 440;
13. for (float i = x1; i < x1+50; i += 0.1) {
14. point(i, height/2+sin(pitch*i)*20);
15. }
17. x1++;
18. }
Thanks very much,
Adam

Why on earth are my sine waves doing this?

[7 Replies]
- 16-Mar-2013 06:38 AM
- Forum: Contributed Library Questions
I need to make some sine waves that move, but cannot seem to get a pure wave. Instead there's an odd part initially as you can see in the picture above. I figure that it's something in the mathematics that I'm missing, some help would be great. Here's the code:
2. import traer.physics.*;
4. ParticleSystem physics;
5. Particle p;
11. void setup(){
13. stroke(255);
14. strokeWeight(1);
16. size(500,500,P3D);
17. background(0);
18. physics = new ParticleSystem( 0.0, 0.0 );
19. int pitch = 440;
21. for(float i = 0.0; i<width; i=i+0.1){
22. p = physics.makeParticle(1,i,height/2+sin(pitch*TWO_PI*i)*20,0);
23. //p.velocity().set(0.1,0,0);
24. }
27. }
29. void draw(){
31. background(0);
32. physics.tick();
33. for(int i = 1; i<physics.numberOfParticles(); i++){
34. p = physics.getParticle(i);
36. float x = p.position().x();
37. float y = p.position().y();
38. point(x, y);
39. }
42. }
44. void mousePressed(){saveFrame("line-######.png");}
Thanks,

Adam

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