1. What to do for Project 2?

2. Objectives Tie back to Processing Work with classes
Present a creative challenge
Work with a different programming language
Well three out of four objectives ain’t bad

3. Many Processing Libraries
Video
Serial
PDF Export
OpenGL
Arduino
Minim  Audio
Many more

4. Minim
A Processing library that uses JavaSound API, Tritonus, and MP3SPI to provide an easy to use audio library.
Features:
AudioPlayer: for playback of WAV, AIFF, AU, SND, & MP3 files.
AudioMetaData: for metadata about a file, such as ID3 tags.
AudioSignal: for writing your own sound synthesis
AudioRecorder: for audio recording
AudioEffect: for writing your own audio effects.
FFT: for doing spectrum analysis.
BeatDetect: for doing beat detection.

5. A Sound Theory
Mike Ruiz’s Sound Applets
Minim FFT
Amplitude
Frequency

6. Music Visualization using Minim
Options:
Use the wave form
Use the FFT (on previous slide)
Use BeatDectect  Explained Here

7. The BeatDetect Class (by Example) (SOUND_ENERGY mode)
void draw() {
beat.detect(song.mix);
if( beat.isOnset() ) { … }
void stop() {
song.close();
minim.stop();
super.stop();
import ddf.minim.*; import ddf.minim.analysis.*; Minim minim; AudioPlayer song; BeatDetect beat; void setup() { minim = new Minim(this); song = minim.loadFile("TicketToRide.mp3"); song.play(); beat = new BeatDetect(); beat.setSensitivity(100); }
Example Program

8. The BeatDetect Class (by Example) (FREQ_ENERGY mode)
import ddf.minim.*;
import ddf.minim.analysis.*;
Minim minim;
AudioPlayer song;
BeatDetect beat;
BeatListener bl;
void setup() {
minim = new Minim(this);
song = minim.loadFile("TicketToRide.mp3",
32768);
song.play();
beat = new BeatDetect(song.bufferSize(), song.sampleRate());
beat.setSensitivity(200);
bl = new BeatListener(beat, song); } …
class BeatListener implements AudioListener {
private BeatDetect beat;
private AudioPlayer source; … }
Buffer size must be a power of 2
Example Program

9. A Little Insight into Beat Detection
Use the drawGraph() method to see the energy levels.
Example program

10. Project 2 Presented at the time of our final: Tuesday, May 3 @11:30
Seniors, please talk to me about the due date.

11. Resources Main documentation Processing Page Examples
Minim Code Log Examples
Doorbell example by Daniel Shiffman
Audio Processing Examples by Dan Ellis
Vimeo video tutorial 4 and video tutorial 5
OpenProcessing Examples
Beatles Ukulele Project (a source of .mp3 files)