Android Audio Visualization: From Fourier Transform to Custom Visualizer Implementation

The article explains Android audio visualization by decoding PCM data, applying Fourier and Fast Fourier transforms to obtain frequency spectra, comparing the built‑in Visualizer API with a custom JNI‑based implementation, and detailing FFT processing, smoothing, buffering, and Canvas rendering techniques for smooth, performant visual effects.

AndroidAudio VisualizationBufferQueue

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Android Audio Visualization: From Fourier Transform to Custom Visualizer Implementation

360 Tech Engineering

Sep 5, 2019 · Frontend Development

Implementing Multi‑Audio Stream Playback on Web with WebRTC, HTTP‑FLV/HLS and Web Audio API

This article details how to replace WebRTC‑based multi‑audio streaming with HTTP‑FLV or HLS on the web, covering iOS Safari limitations, demuxing FLV, building ADTS headers, decoding with the Web Audio API, channel merging, and real‑time audio visualization using AnalyserNode.

Audio VisualizationFLVHTTP-FLV

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Implementing Multi‑Audio Stream Playback on Web with WebRTC, HTTP‑FLV/HLS and Web Audio API

Tencent Music Tech Team

Dec 2, 2016 · Frontend Development

Introduction to Web Audio API: Concepts, Nodes, and Application Cases

The Web Audio API is a high‑level JavaScript interface that lets developers create and connect modular AudioNodes within an AudioContext to process, filter, visualise, and spatialise sound, supporting sources such as media elements, streams, and buffers, and enabling real‑time recording, clipping, and karaoke applications.

Audio VisualizationJavaScriptWeb Audio API

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Introduction to Web Audio API: Concepts, Nodes, and Application Cases