: Identifies complex chords, including sevenths, fifths, and suspended chords. Tempo Detection
The most annoying bug—random phantom power clicking on input 3—was squashed in the Spring 2025 UPD.
Hornet SongKey MK4 UPD — Quick Guide & Tips
: Unlike older versions that relied solely on frequency filters, the MK4 uses an advanced Artificial Intelligence unit trained on thousands of songs. It leverages a statistical chord progression model to track key changes in real-time without needing a manual reset. hornet songkey mk4 upd
: Features a resizable vector GUI with keyboard and histogram visualizations that show active notes and confidence levels for the identified key.
As it analyzes an audio file, SongKey translates those detected chords into active MIDI data. Producers can route this output onto an empty MIDI track inside a Digital Audio Workstation (DAW) to immediately sketch out bass lines or synth pads. Core Specifications & System Requirements
Given the free nature of the 4.0.3 update and the minimal €2.99 upgrade cost for legacy owners, there is no barrier to entry. is a powerful, affordable, and exceptionally refined tool that will quickly become an essential part of your creative arsenal. : Identifies complex chords, including sevenths, fifths, and
Performance tips
HoRNet SongKey MK4 is an intelligent plugin designed to detect the musical key, chord progression, and tempo (BPM) of any audio signal in real-time. It acts as an invaluable assistant, allowing creators to spend less time figuring out musical theory and more time producing. It works on both full mixes and individual instrument tracks, providing immediate feedback on the harmonic content of the music. Key Enhancements in the MK4 Update (upd)
The (specifically driver 1.2.8 and firmware 2.0.1) is not just a bug-fix release. It fundamentally improves latency, adds useful features (mono button, MIDI clock), and ensures compatibility with the latest operating systems. It leverages a statistical chord progression model to
These refinements make the a more robust, efficient, and user-friendly tool than ever before.
While many competitors rely on offline analysis (requiring you to drop a file into a separate window), SongKey MK4 is designed to live on your master bus, detecting the key live as you play or record.
: Regarded as a "no-brainer" for its price point, often cited as a reliable "sanity check" for music theory tasks.