Cathar vs Diamond Cut Audio Restoration Tools 11.09

Cathar is a free audio restoration toolkit for Linux and macOS, with tools to clean, enhance, and level recordings. It accepts WAV, MP3, FLAC, OGG, and M4A files, along with audio tracks inside MP4 and MKV video, and writes WAV, FLAC, or AIFF according to the output filename extension. Restoration options include denoising, de-humming, de-winding, de-clicking, de-clipping, de-reverberation, spectral repair, de-plosive processing, and rustle removal. Enhancement tools handle de-essing, breath removal, voice isolation, and bandwidth extension; loudness and peak normalization prepare delivery levels. The Rust toolkit uses inspectable and tunable DSP stages. Effects can run through the Rust crate or as command-line steps in a media pipeline. An optional machine-learning feature adds a deterministic GRU denoiser with safetensors weights. Optional terminal tools provide an audio player and spectrogram viewer. Cathar is licensed under Apache 2.0 or MIT, and its latest listed release is v0.8.0; the project describes itself as pre-1.0.

Diamond Cut Audio Restoration Tools 11.09 is Windows software for cleaning recordings, including old records and tapes, as well as conversations, speeches and concerts. Restoration tools cover noise reduction, spectral repair, click and crackle removal, hum removal, declip repair and batch processing. Harmonic Noise filters at 100 and 120 Hz address line noise. Other capabilities include audio conversion, transcription, speed and pitch changes, and audio and acoustical measurements. It supports ASIO sound card drivers, AAC files such as.aac and.m4a, and up to six VST plug-ins at a time. Its spectrograph display includes Mel frequency axis scaling, added in version 11.08. The standalone program requires Microsoft Windows 10 or later. It costs $59, paid once; there is no free plan, but a demo download is available. The product page includes one year of free support, with manuals, a knowledge base and a user discussion area listed as support resources.