55 lines
1.2 KiB
Plaintext
55 lines
1.2 KiB
Plaintext
import ddf.minim.*;
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import ddf.minim.analysis.*;
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Minim minim;
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AudioInput myAudio;
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// beat detection with sound energy
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BeatDetect myBeat;
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final int BEAT_MAX = 60;
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int myBeatMax = 20; // sync with gui
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int myBeatCurrent = 0;
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FFT myFFT;
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void setupAudioAnalysis() {
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minim = new Minim(this);
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myAudio = minim.getLineIn(); // Minim.STEREO, bufferSize=1024, sampleRate=44100, int bitDepth=16
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// beat detection setup
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myBeat = new BeatDetect();
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// fft setup
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myFFT = new FFT(myAudio.bufferSize(), myAudio.sampleRate());
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myFFT.logAverages(22, 12); // (22,12) -> 120 averages
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myFFT.window(FFT.HANN); // good for "random" signals
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// debug
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println(".");
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println("[debug][audio]: number of fft bins: "+myFFT.avgSize());
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println(".");
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}
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void drawAudioAnalysis() {
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// beat detection processing
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if(myBeatCurrent > 0) {
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myBeatCurrent--; // linear decay
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}
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myBeat.detect(myAudio.mix);
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if(myBeat.isOnset()) {
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myBeatCurrent = myBeatMax;
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}
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// draw beat detection
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fill(0);noStroke();
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rect(20,20,40,40);
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fill(255);
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circle(20+20,20+20,getBeatDetectNormalized()*36);
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// fft processing
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}
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float getBeatDetectNormalized() {
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return constrain((myBeatCurrent / float(myBeatMax)), 0.0f, 1.0f);
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}
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