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<h2 title="Interface AudioSpectrumListener" class="title">Interface AudioSpectrumListener</h2>
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<pre>public interface <span class="typeNameLabel">AudioSpectrumListener</span></pre>
<div class="block">Audio spectrum callback interface. The observer receives periodic updates of
the audio spectrum. A single observer may be attached to a given <a href="../../../javafx/scene/media/MediaPlayer.html" title="class in javafx.scene.media"><code>MediaPlayer</code></a>
using <a href="../../../javafx/scene/media/MediaPlayer.html#setAudioSpectrumListener-javafx.scene.media.AudioSpectrumListener-"><code>MediaPlayer.setAudioSpectrumListener(javafx.scene.media.AudioSpectrumListener)</code></a>.</div>
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<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JavaFX 2.0</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../javafx/scene/media/MediaPlayer.html" title="class in javafx.scene.media"><code>MediaPlayer</code></a></dd>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javafx/scene/media/AudioSpectrumListener.html#spectrumDataUpdate-double-double-float:A-float:A-">spectrumDataUpdate</a></span>(double timestamp,
double duration,
float[] magnitudes,
float[] phases)</code>
<div class="block">Notifies the observer about new data available for the audio spectrum.</div>
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<h4>spectrumDataUpdate</h4>
<pre>void spectrumDataUpdate(double timestamp,
double duration,
float[] magnitudes,
float[] phases)</pre>
<div class="block">Notifies the observer about new data available for the audio spectrum.
<p>The notification period for updates may be set using
<a href="../../../javafx/scene/media/MediaPlayer.html#setAudioSpectrumInterval-double-"><code>MediaPlayer.setAudioSpectrumInterval(double)</code></a>, and the number of bands and
sensitivity threshold via <a href="../../../javafx/scene/media/MediaPlayer.html#setAudioSpectrumNumBands-int-"><code>MediaPlayer.setAudioSpectrumNumBands(int)</code></a> and
<a href="../../../javafx/scene/media/MediaPlayer.html#setAudioSpectrumThreshold-int-"><code>MediaPlayer.setAudioSpectrumThreshold(int)</code></a>, respectively. The default
values of the settings are an interval of <code>0.1</code> seconds,
<code>128</code> bands, and sensitivity threshold <code>-60.0</code> dB.
<p>The arrays
passed to the listener should be considered to be read-only as the
underlying implementation may re-use them.</p></div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>timestamp</code> - timestamp of the event in seconds.</dd>
<dd><code>duration</code> - duration for which the spectrum was computed in seconds.</dd>
<dd><code>magnitudes</code> - array containing the non-positive spectrum magnitude in decibels
(dB) for each band.
The size of the array equals the number of bands and should be considered
to be read-only.</dd>
<dd><code>phases</code> - array containing the phase in the range
[<code>Math.PI</code>, <code>Math.PI</code>] for each band.
The size of the array equals the number of bands and should be considered
to be read-only.</dd>
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