java - TarsosDSP Pitch Analysis for Dummies -

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i woking on progarm analyze pitch of sound file. came across api called "tarsosdsp" offers various pitch analysis. experiencing lot of trouble setting up. can show me quick pointers on how use api (espically pitchprocessor class) please? snippets of code extremely appreciated because new @ sound analysis.

thanks

edit: found document @ http://husk.eecs.berkeley.edu/courses/cs160-sp14/index.php/sound_programming there example code shows how setup pitchprocessor, …

int bufferreadresult = mrecorder.read(mbuffer, 0, mbuffersize); // (note: not android.media.audioformat) be.hogent.tarsos.dsp.audioformat mtarsosformat = new be.hogent.tarsos.dsp.audioformat(sample_rate, 16, 1, true, false); audioevent audioevent = new audioevent(mtarsosformat, bufferreadresult); audioevent.setfloatbufferwithbytebuffer(mbuffer); pitchprocessor.process(audioevent);

…i quite lost, mbuffer , mbuffersize? how find these values? , input audio files?

the basic flow of audio in tarsosdsp framework follows: incoming audio stream originating audio file or microphone read , chopped frames of e.g. 1024 samples. each frame travels through pipeline modifies or analyses (e.g. pitch analysis) it.

in tarsosdsp audiodispatcher responsible chop audio in frames. wraps audio frame audioevent object. audioevent object send through chain of audioprocessors.

so in code quoted mbuffer audio frame, mbuffersize size of buffer in samples. can choose buffer size pitch detection 2048 samples reasonable.

for pitch detection tarsosdsp library:

   pitchdetectionhandler handler = new pitchdetectionhandler() {         @override         public void handlepitch(pitchdetectionresult pitchdetectionresult,                 audioevent audioevent) {             system.out.println(audioevent.gettimestamp() + " " pitchdetectionresult.getpitch());         }     };     audiodispatcher adp = audiodispatcherfactory.fromdefaultmicrophone(2048, 0);     adp.addaudioprocessor(new pitchprocessor(pitchestimationalgorithm.yin, 44100, 2048, handler));     adp.run();

in code first handler created prints detected pitch. audiodispatcher attached default microphone , has buffersize of 2048. audio processor detects pitch added audiodispatcher. handler used there well.

the last line starts process.


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