@audio/denoise vs CEDAR Cambridge

@audio/denoise is a free web tool for cleaning recordings and listening to or saving the result. It handles targets including steady background noise, mains hum, clicks, pops, vinyl crackle, clipping, wind rumble, plosives, sibilance, room reverb, and noise between phrases. The page describes thirteen open-source restoration methods and a classifier. Automatic mode measures properties of a recording, selects a specialized method, and displays its plan; users can instead choose methods such as dehum, declick, declip, and gate. Audio is processed in the browser, and the page says it is not uploaded or sent off the device. The approach uses classical signal processing rather than AI noise removal. For music, the page identifies hum, clicks, crackle, and clipping as treatable, while advising light use of broadband denoising and comparison with the original. Machine-learning models may perform better on heavy speech-over-noise. The associated npm package processes mono Float32Array audio. Automatic mode does not choose dereverb, which must be selected explicitly.

CEDAR Cambridge is a 64-bit platform for speech enhancement and audio restoration on macOS and Windows. Its modular processing system can be automated and is described for audio forensics and security, archives and libraries, broadcast, and mastering. Voice extraction options include DNS, DNS Two, FNR, and VoicEX; other tools address noise, impulse sounds, and speech intelligibility. Retouch provides spectral editing, while dynamics, loudness control, and equalisation modules cover operations such as compression, limiting, and normalisation. Depending on hardware, processing can reach up to 100 times faster than real time. Cambridge can integrate with media asset management systems and add track reports and metadata to databases. Its Report Generator records processing details and produces PDF, HTML, or XML reports. Silent 1 is intended for individual users, while Series V is aimed at batch processing in archives, libraries, and forensic laboratories. The listed starting price is £349, with a 14-day trial; prospective hardware or systems buyers are directed to contact CEDAR Audio for pricing information.