ABX High Fidelity Test

Overview

ABX High Fidelity Test at https://abx.digitalfeed.net is a free online tool implementing the ABX blind testing methodology to compare lossless and lossy audio samples. It presents users with references A (lossless) and B (lossy), followed by a random X matching one of them, requiring identification across multiple trials for five tracks inspired by a Tidal test. The browser-based test evaluates listener discernment of compression artifacts using various codecs like AAC, MP3, and OPUS.

History

The site was created as a recreation of Tidal's lossless vs. lossy audio challenge, adapting the standard ABX testing protocol for high-fidelity evaluation. It emerged around 2025, as referenced in related blog posts, to provide a more rigorous, multi-trial version of the original quick test. No specific founder or company details are publicly available.

Notable Products

• ABX High Fidelity Test - Online blind comparison tool for lossless vs. lossy audio across five tracks with configurable trial counts.

Reputation

Perceived as a practical, accessible implementation of scientific ABX methodology for audio enthusiasts testing their hearing and equipment limits. Praised for statistical rigor requiring multiple trials to achieve confidence levels like 95%. Lacks formal backing or extensive documentation, positioning it as an informal community resource rather than a professional benchmarking standard.