In the neon-drenched sprawl of Neo-Veridia, sound wasn’t just entertainment; it was currency. And for Elias, a "frequency scavenger" living in the rusted underbelly of Sector 4, his gear was his lifeline.

The Math: The MK3 had a 2.0-ohm output impedance. According to the damping factor rule (1:8 ratio), the minimum headphone impedance should be 16 ohms. Many popular IEMs (Campfire Audio, 64 Audio, Sony IER series) dip to 6-10 ohms in the bass region. This caused:

Advanced Chromagram: The MK4 uses a high-resolution chromagram that better distinguishes between fundamental frequencies and overtones.

MIDI Integration

: Users can now feed MIDI tracks into the plugin for analysis or output recognized chords as MIDI data to record and edit in their DAW.

Algorithm Type

| Feature | HornetSong Key Mk3 | HornetSong Key Mk4 | Advantage | | :--- | :--- | :--- | :--- | | | Correlation-based | Neural Network / AI | Mk4: Higher accuracy in complex mixes | | Latency | Low (approx 10-20ms) | Near-Zero | Mk4: Suitable for live performance | | Key Change Handling | Manual reset often required | Automatic modulation detection | Mk4: Better for progressive songs | | Interface | Fixed size, vintage style | Scalable, modern Retina | Mk4: Better visibility |

1. Audio Fidelity: Louder, Cleaner, Safer