Cathar vs LANDR ReHance

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.

LANDR ReHance uses AI to analyze audio and remove unwanted artifacts such as background noise, clicks, pops, plosives, bleed and reverb. It is available in the LANDR Library online or as a plugin for a DAW, and LANDR says enhancement is unlimited in either format. Three intensity levels provide a choice of processing strength. The tool is described for podcasts, voice memos, field and home studio recordings, video audio and live recordings with instrument bleed. The plugin supports VST3, AU and AAX formats and works with major DAWs that support them. It requires macOS 10.15 or later or 64-bit Windows 10 or later, plus an Intel Core i5, AMD Ryzen 5 or Apple Silicon equivalent and 4 GB RAM. LANDR says the audio technology is powered by Insoundz. ReHance is not available in the LANDR App, though LANDR says it can be used in mobile browsers. A LANDR Studio subscription is required; the listed annual-plan price for a subscription including ReHance is $11.99 a month. A 3-day trial is offered for any Studio tier, and the subscription starts automatically unless cancelled before the trial ends.