equalizer

I know there are a lot of questions about equalizers in so, but I didn't get what I was looking. What I want to do is an equalizer for modifying audio samples in such a way like: equalizer.eqAudio(audiosamples, band, gain) I'm not sure if that is the exact interface that I want because I know little about DSP in terms of implementing them (I used filters, limiters, compressors but not made them). So Googling about this I read that I must do a FFT to the samples so I get the data per frequency ranges instead of amplitude, process it the way I want and then make the inverse of the FFT so I get

I have written below code in onCreate method of activity. MusicPlayer.getEqualizerHelper().getCurrentEqualizer().usePreset((short) 0); --- line no 1 short numberFrequencyBands = MusicPlayer.getEqualizerHelper().getCurrentEqualizer().getNumberOfBands();--- line no 2 final short lowerEqualizerBandLevel = MusicPlayer.getEqualizerHelper().getCurrentEqualizer().getBandLevelRange()[0];--- line no 3 and it works fine in all android o.s below nougat. When I install my app on nougat device it throws exception on line no 1. Please suggest me where is the problem and solution for it. Thanks in advance

I want to create simple equalizer for android. How can I do it? Try to find some methods in MediaPlayer class. But all my attempts failed. Simple answer... you can't do it with the framework or with Java (because there is no JMF support in Android). You have to use the NDK and JNI to compile a native library with equalizer support. If you know C/C++ there are plenty of libraries around that will provide this functionality but if you don't know C/C++ or have the means to pay someone that does I would recommend you move on to something else within your means... There are even some working

I'm trying to wrap my head around using the Web Audio API to recreate something like Winamp's 10-band equalizer. (source: head-fi.org ) From what I can gather, I have to create 10 Biquad Filters , set their type to 2 (for a Bandpass filter) and set their frequency to [60, 170, 310, 600, 1000, 3000, 6000, 12000, 14000, 16000] respectively. Once I have done that (and here's where I'm getting a little confused) I would then create a separate Gain Node for each frequency "band" and bind its value to a slider. <input id="someFreqBand" type="range" min="-12" max="12" step="0.1" value="0" onchange=

before enabling equalizer capabilities, I check for api level to make sure it's equal or greater than 9. From the reports I'm getting from my users, it seems that some exceptions are thrown anyway : the code eq = new Equalizer(0, mp.getAudioSessionId()) can raise : Caused by: java.lang.UnsupportedOperationException: Effect library not loaded at android.media.audiofx.AudioEffect.<init>(AudioEffect.java:355) at android.media.audiofx.Equalizer.<init>(Equalizer.java:149) and the code eq.getBandLevelRange() can raise : Caused by: java.lang.UnsupportedOperationException: AudioEffect: invalid