21 Creating Audio Visualizations
In this chapter, you will learn how to use the Analyser node to create a spectrum analyzer that displays real-time amplitude information of audio signals across a collection of frequency bands. The Web Audio API includes a node named Analyser that gives you real-time frequency and time domain information about audio input sources. This information can be used to create custom visual representations of audio signals that include (but are not limited to) spectrum analyzers, phase scopes, and waveform renders.
A Brief Word on Fourier Analysis
Before you get started, you must first have a basic conceptual understanding ...
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