43 lines
2.8 KiB
XML
43 lines
2.8 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
|
|
<class name="AudioEffectSpectrumAnalyzer" inherits="AudioEffect" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
|
|
<brief_description>
|
|
Creates an [AudioEffectInstance] which performs frequency analysis and exposes results to be accessed in real-time.
|
|
</brief_description>
|
|
<description>
|
|
Calculates a Fourier Transform of the audio signal. This effect does not alter the audio. Can be used for creating real-time audio visualizations, like a spectrogram.
|
|
This resource configures an [AudioEffectSpectrumAnalyzerInstance], which performs the actual analysis at runtime. An instance should be obtained with [method AudioServer.get_bus_effect_instance] to make use of this effect.
|
|
</description>
|
|
<tutorials>
|
|
<link title="Audio buses">$DOCS_URL/tutorials/audio/audio_buses.html</link>
|
|
<link title="Audio effects">$DOCS_URL/tutorials/audio/audio_effects.html</link>
|
|
<link title="Audio Spectrum Visualizer Demo">https://godotengine.org/asset-library/asset/2762</link>
|
|
</tutorials>
|
|
<members>
|
|
<member name="buffer_length" type="float" setter="set_buffer_length" getter="get_buffer_length" default="2.0">
|
|
The length of the buffer to keep, in seconds. Higher values keep data around for longer, but require more memory. Value can range from 0.1 to 4.
|
|
</member>
|
|
<member name="fft_size" type="int" setter="set_fft_size" getter="get_fft_size" enum="AudioEffectSpectrumAnalyzer.FFTSize" default="2">
|
|
The size of the [url=https://en.wikipedia.org/wiki/Fast_Fourier_transform]Fast Fourier transform[/url] buffer. Higher values smooth out the spectrum analysis over time, but have greater latency. The effects of this higher latency are especially noticeable with sudden amplitude changes.
|
|
</member>
|
|
</members>
|
|
<constants>
|
|
<constant name="FFT_SIZE_256" value="0" enum="FFTSize">
|
|
Use a buffer of 256 samples for the Fast Fourier transform. Lowest latency, but least stable over time.
|
|
</constant>
|
|
<constant name="FFT_SIZE_512" value="1" enum="FFTSize">
|
|
Use a buffer of 512 samples for the Fast Fourier transform. Low latency, but less stable over time.
|
|
</constant>
|
|
<constant name="FFT_SIZE_1024" value="2" enum="FFTSize">
|
|
Use a buffer of 1024 samples for the Fast Fourier transform. This is a compromise between latency and stability over time.
|
|
</constant>
|
|
<constant name="FFT_SIZE_2048" value="3" enum="FFTSize">
|
|
Use a buffer of 2048 samples for the Fast Fourier transform. High latency, but stable over time.
|
|
</constant>
|
|
<constant name="FFT_SIZE_4096" value="4" enum="FFTSize">
|
|
Use a buffer of 4096 samples for the Fast Fourier transform. Highest latency, but most stable over time.
|
|
</constant>
|
|
<constant name="FFT_SIZE_MAX" value="5" enum="FFTSize">
|
|
Represents the size of the [enum FFTSize] enum.
|
|
</constant>
|
|
</constants>
|
|
</class>
|