Overview
Audio restoration fails when it applies maximum noise reduction rather than targeted treatment. The tools that remove broadband noise, clicks, hum, and reverb all introduce artifacts at high processing amounts — the underwater warble of aggressive noise reduction, the musical ringing of heavy spectral repair, the thin disconnected sound of over-processed voice. The restoration that sounds natural identifies the specific problem, applies the minimum treatment to make it inaudible in context, and stops before the artifacts become audible.
The Audio Restoration Framework diagnoses the specific noise type, selects the appropriate tool for that specific problem, calibrates settings to achieve inaudible treatment, and identifies the recordings that exceed what restoration can address.