According to http://developer.android.com/reference/android/media/audiofx/Equalizer.html#getNumberOfBands () , we can see the description of the getNumberOfBands () method - Gets the number of frequency ranges supported by the equalizer motor .
It depends on the version of the device or Android.
Thank.
I guess this is most likely device dependent .
The frequency depends on the equipment. Therefore, according to my knowledge, it should depend on the device.
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