Indie devs get browser-based adaptive music SDK built on Web Audio API

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A developer has built an open-source adaptive music SDK aimed at indie web game developers, offering a lightweight alternative to costly middleware like FMOD and Wwise. The SDK uses the Web Audio API's high-precision clock, via Tone.js, to synchronise beat-aligned crossfades between musical layers such as town, exploration, combat, and victory. Rather than cutting tracks abruptly, the engine waits for the next musical beat before transitioning, making state changes sound intentional and seamless. Written in TypeScript and bundled in both ESM and CJS formats, the SDK is designed to integrate in as few as five lines of code. A demo mini-RPG built in Phaser 3 showcases the soundtrack shifting dynamically when the player enters combat.

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