Songkey Mk4 !!hot!! | Hornet

: The plugin uses a sophisticated "chromagram" engine—a visual map of note intensity across octaves—combined with a statistical chord progression model. This allows it to follow key changes dynamically during a song without requiring a manual reset.

: It features a real-time BPM finder that tracks transients and peaks. The standalone version can also generate a MIDI clock to synchronize external gear or other DAWs with live audio input.

The HoRNet SongKey MK4 is frequently praised for its budget-friendly price point and low CPU overhead, making it accessible for large-scale projects. The interface is a resizable vector GUI that supports sharp and flat notation.

: It identifies active chords in both audio and MIDI formats. A dedicated piano roll and keyboard view help users visualize the harmonic structure.

While many users find it to be a "game-changer" for streamlining workflow, some community reviews on platforms like Reddit note that while it is highly effective, it may occasionally struggle with complex syncopated rhythms or acapellas where clear harmonic information is missing. Technical Specifications Best key detection algorithm (plugin)? : r/audioengineering