How to Build a Synchronized A/B Audio Player for Evaluating AI Audio Processing

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A developer has outlined a method for building a fair A/B audio preview tool designed to evaluate AI audio processing effects such as denoising and de-reverberation. The core problem with standard dual-player setups is that mismatched playback positions force listeners to compare sounds from memory rather than in real time. The proposed solution uses a single transport with a version toggle, decoding both original and processed audio into Web Audio API AudioBuffers that share the same AudioContext clock. Switching between versions is handled by routing each buffer through its own GainNode, keeping both sources running while only one gain channel is open at a time. A short millisecond-level gain ramp is recommended to prevent audible clicks during version switches without obscuring the comparison.

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