Equalization

How to apply equalization filtering to shape the response

This example demonstrates how to apply filtering and tonal enhancement to a signal using the EQ node. In this example, a low-pass filter is applied with adjustable parameters for frequency, gain, and resonance (Q) to shape the spectral response of the sound.

// Configure the graph for rendering
let context = Assembler(rendering: .live).createAudioGraph()

// Configure an audio source (Renderer) from a local audio file
let url = URL(fileURLWithPath: "/path/to/source.mp3")
let source = MediaRenderer(contentsOf: url)

// Configure the EQ node with a lowpass filter
let destination = EQ(filter: .lowpass)
destination.q = 10.0
destination.frequency = 1000.0
destination.gain = 20.0
destination.detune = 0.0

// Configure node connections
try context.connect(source: source, to: destination)
try context.connect(source: destination, to: context.destination)
source.play(after: 0)

The following video shows the sample code in action and its real-time processing.

For a complete description of each class, method, and property referenced in this section, refer to the official API documentation, where you will find detailed references, available components, parameters, and additional usage code examples.