What to do for Project 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

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

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.

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

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

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

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

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

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

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)