Module javafx.media
Package javafx.scene.media

## Class AudioEqualizer

- java.lang.Object
- - javafx.scene.media.AudioEqualizer

-     public final class AudioEqualizer
      extends Object

  The `AudioEqualizer` class provides audio equalization control for a media player. It contains an `ObservableList` of `EqualizerBand` elements. Each `AudioEqualizer` instance is connected to a `MediaPlayer` and may be obtained using the `MediaPlayer.getAudioEqualizer` method.
  Since:
    JavaFX 2.0
  See Also:
    `MediaPlayer`, `EqualizerBand`

- - ### Property Summary

    Properties
    Type | Property | Description
    --- | --- | ---
    `BooleanProperty` | `enabled` | Enables or disables `AudioEqualizer`.

  - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static int` | `MAX_NUM_BANDS` | Maximum number of bands an `AudioEqualizer` may contain.

  - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `BooleanProperty` | `enabledProperty()` | Enables or disables `AudioEqualizer`.
    `ObservableList<EqualizerBand>` | `getBands()` | ObservableList containing `EqualizerBand` elements.
    `boolean` | `isEnabled()` | Gets the value of the property enabled.
    `void` | `setEnabled​(boolean value)` | Sets the value of the property enabled.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Property Detail

    - #### enabled

          public BooleanProperty enabledProperty

      Enables or disables `AudioEqualizer`. If the enabled property is set to `false`, `AudioEqualizer` settings are preserved but not taken into account during playback, which is equivalent to setting all `EqualizerBand.gain` properties to zero.
      Default value:
        `true`
      See Also:
        `isEnabled()`, `setEnabled(boolean)`

  - ### Field Detail

    - #### MAX_NUM_BANDS

          public static final int MAX_NUM_BANDS

      Maximum number of bands an `AudioEqualizer` may contain. In the current implementation this value is `64`.
      See Also:
        Constant Field Values

  - ### Method Detail

    - #### getBands

          public final ObservableList<EqualizerBand> getBands()

      ObservableList containing `EqualizerBand` elements. The content of the sequence may be changed by adding or removing `EqualizerBand` elements. When adding elements, the user must be prepared to catch `IllegalArgumentException`s because any change to the internal list can be vetoed if a newly added instance is not valid.

      The constraints for a valid `EqualizerBand` instance are:

      - `EqualizerBand.centerFrequency` > 0
      - `EqualizerBand.bandwidth` > 0
      - `EqualizerBand.MIN_GAIN` ≤ `EqualizerBand.gain` ≤ `EqualizerBand.MAX_GAIN`

      The default set of bands is as in the following table; all bands have unity gain (0 dB).

      AudioEqualizer Band Table
      Band Index | Center Frequency (Hz) | Bandwidth (Hz)
      --- | --- | ---
      0 | 32 | 19
      1 | 64 | 39
      2 | 125 | 78
      3 | 250 | 156
      4 | 500 | 312
      5 | 1000 | 625
      6 | 2000 | 1250
      7 | 4000 | 2500
      8 | 8000 | 5000
      9 | 16000 | 10000

      Returns:
        ObservableList containing `EqualizerBand` elements.

    - #### setEnabled

          public final void setEnabled​(boolean value)

      Sets the value of the property enabled.
      Property description:
        Enables or disables `AudioEqualizer`. If the enabled property is set to `false`, `AudioEqualizer` settings are preserved but not taken into account during playback, which is equivalent to setting all `EqualizerBand.gain` properties to zero.
      Default value:
        `true`

    - #### isEnabled

          public final boolean isEnabled()

      Gets the value of the property enabled.
      Property description:
        Enables or disables `AudioEqualizer`. If the enabled property is set to `false`, `AudioEqualizer` settings are preserved but not taken into account during playback, which is equivalent to setting all `EqualizerBand.gain` properties to zero.
      Default value:
        `true`

    - #### enabledProperty

          public BooleanProperty enabledProperty()

      Enables or disables `AudioEqualizer`. If the enabled property is set to `false`, `AudioEqualizer` settings are preserved but not taken into account during playback, which is equivalent to setting all `EqualizerBand.gain` properties to zero.
      Default value:
        `true`
      See Also:
        `isEnabled()`, `setEnabled(boolean)`