AudioEffectSpectrumAnalyzer

Inherits: AudioEffect < Resource < Reference < Object

Audio effect that can be used for real-time audio visualizations.

Description

This audio effect does not affect sound output, but can be used for real-time audio visualizations.

See also AudioStreamGenerator for procedurally generating sounds.

Tutorials

Properties

float

buffer_length

2.0

FFT_Size

fft_size

2

float

tap_back_pos

0.01

Enumerations

enum FFT_Size:

  • FFT_SIZE_256 = 0 —- Use a buffer of 256 samples for the Fast Fourier transform. Lowest latency, but least stable over time.

  • FFT_SIZE_512 = 1 —- Use a buffer of 512 samples for the Fast Fourier transform. Low latency, but less stable over time.

  • FFT_SIZE_1024 = 2 —- Use a buffer of 1024 samples for the Fast Fourier transform. This is a compromise between latency and stability over time.

  • FFT_SIZE_2048 = 3 —- Use a buffer of 2048 samples for the Fast Fourier transform. High latency, but stable over time.

  • FFT_SIZE_4096 = 4 —- Use a buffer of 4096 samples for the Fast Fourier transform. Highest latency, but most stable over time.

  • FFT_SIZE_MAX = 5 —- Represents the size of the FFT_Size enum.

Property Descriptions

Default

2.0

Setter

set_buffer_length(value)

Getter

get_buffer_length()

The length of the buffer to keep (in seconds). Higher values keep data around for longer, but require more memory.

Default

2

Setter

set_fft_size(value)

Getter

get_fft_size()

The size of the Fast Fourier transform 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.

Default

0.01

Setter

set_tap_back_pos(value)

Getter

get_tap_back_pos()