Fundamentals of Programming

1. Fundamentals of Programming SM1204 Semester A 2011

2. Assignment 3 Due date 20 Dec Collection via ACS

3. Requirements • Create your own music visualization (20%) • Select your audio / music • Design your visualization • Use of Minim audio library (30%) • Program complexity (20%) • Creative graphics (30%)

4. Example • http://www.youtube.com/watch?v=KW5D9IVfb1k&feature=related

5. Example • http://www.youtube.com/watch?v=1JkN3Uwgqi4&feature=related

6. Example • http://www.youtube.com/watch?v=0AVyhytUy7k&feature=related

7. Sample Program

8. Sample Program • Import library • Define player and beat detector objects import ddf.minim.*; import ddf.minim.analysis.*; Minim minim; AudioPlayer player; BeatDetect beat; int n = 5; float[][] a = new float[n][n];

9. Sample Program • Create objects & Initialize array elements void setup() { size(400, 400); minim = new Minim(this); player = minim.loadFile("test2.mp3"); beat = new BeatDetect( player.bufferSize(), player.sampleRate() ); player.play(); // initialize item size for (inti=0; i<n; i++) { for (int j=0; j<n; j++) { a[i][j] = 40; } } }

10. Sample Program • Beat detection and rendering void draw() { beat.detect(player.mix); background(0); strokeWeight(4); for (inti=0; i<n; i++) { for (int j=0; j<n; j++) { if (beat.isOnset(i*5+j)) { a[i][j] = 80; } float s = a[i][j]; float c = map(s, 40, 80, 200, 255); noFill(); stroke(c); ellipse(i*80+40, j*80+40, s, s); fill(c); noStroke(); ellipse(i*80+40, j*80+40, s / 2, s / 2); if (a[i][j] > 40) { a[i][j] *= 0.95; } } } }

11. Sample Program • Do not forget to add the stop( ) function void stop() { player.close(); minim.stop(); super.stop(); }