Sample Project

[nomanr]

Could you point to a sample project using this library?
I've used minim in Processing, I am getting it hard to use this library in native android.

[DASAR-zz]

Maybe I will do it later. This library is just PART of Minim which can be run on Android. You have to record or read audio data yourself, then this data can be processed by Minim.
What exactly you wanna do? What problem do you have with this library right now?

[nomanr]

I've used the Minim on processing, I load a sample or a song and play it. I was interested in FFT analysis. So I tried to do it in the Processing way. But no luck.

[DASAR-zz]

FFT, beat detection, etc is possible using this library. I just cut stuff which use Java Sound package because of java.sound is not available on Android. Maybe I can help you if you provide more info.

[DASAR-zz]

There is also: https://github.com/processing/processing-android/wiki some kind of port, but anyway Minim without modifications will not work. Don't know how good actually this Processing for Android.

[nomanr]

Actually I tried to use your library on native android. On processing minim works fine.

[DASAR-zz]

I was using ddf.minim.analysis.BeatDetect from this library. Works fine.

// Initialize recorder instance
recorder = createRecorder(formats.get(0));

beatDetect = new BeatDetect(bufferSizeInSamples,recorder.getSampleRate());

// Set MODE
beatDetect.detectMode(BeatDetect.FREQ_ENERGY);

beatDetect.setSensitivity(SENSETIVITY_MS);

// Then inside cycle read audio data, convert to float representation and process
shortToFloat(audioData, converted);

isSilence = silenceDetector.isSilence(converted);

// Process
beatDetect.detect(converted);

isBeat = beatDetect.isKick();

[DASAR-zz]

You wanna use ddf.minim.analysis.FFT or ? Trick for me was converting byte array audio to float representation.

docs:
http://code.compartmental.net/minim/javadoc/ddf/minim/analysis/FFT.html

[nomanr]

Hmmm alright thanks man. I'll try it.

[nomanr]

But I'll suggest you should add a sample project for this library. That should include main features like FFT and beat detection etc.

[DASAR-zz]

Ok I will do it later. Also I must convert this project to Android Studio project and provide gradle support.

[zerozeus]

Hi, thanks for your excellent work. And I am wondering have you finish your work which is converting this project to Android Studio?

[DASAR-zz]

@farada Not yet( But hopefully I will find some time to do so soon.

[dragonchen999]

I try to implement an IIR bandpass filter(minim/effects/BandPass) in my current android code, However, I am not hearing any differences even though I implemented the bandpass filter. What am I doing wrong? Could you advise/help me?
Thank You so much!
My current code

float synth_frequency1 = 8000;
float synth_frequency2 = 15000;
int minSize = 100000;
final int SAMPLE_RATE= 44100;

AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
                SAMPLE_RATE,
                AudioFormat.CHANNEL_CONFIGURATION_MONO,
                AudioFormat.ENCODING_PCM_16BIT,
                minSize,
                AudioTrack.MODE_STREAM);

short[] buffer = new short[minSize];

.
.
.
.
.
audioTrack.write(buffer, 0, buffer.length);
// ***************************************************************
BandPass bandpass = new BandPass(8000,1000,SAMPLE_RATE);
float[] signalF = shortToFloat(buffer2);
bandpass.process(signalF);
bandpass.printCoeff();
buffer = FloatToshort(signalF);
// ***************************************************************
audioTrack.write(buffer, 0, buffer.length);