TONIC 2
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About this plugin
TONIC 2 by zplane is a real-time harmonic analysis plugin that identifies the key and scale of incoming audio or MIDI material with measurable accuracy. The plugin processes your audio source and returns up to three potential key and scale matches, each ranked by probability percentage. This approach acknowledges the inherent ambiguity in harmonic detection, particularly useful when analyzing complex or polytonally-layered source material where a definitive answer may not exist.
The technical implementation relies on spectral analysis of audio data or direct MIDI parsing, presenting results through an interactive virtual keyboard interface. Users can instantly audition compatible notes and chords against the detected harmonic content, or switch between suggested keys to evaluate which best fits their creative intent. The Fold Keys mode restricts your MIDI keyboard to only scale-appropriate notes, functioning as a performative constraint tool rather than merely informational. Chord mode allows direct MIDI export of suggested harmonic progressions into your DAW, accelerating compositional workflows.
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TONIC 2 serves producers working with sample-based material, remix engineers integrating unknown sources, and musicians seeking theoretical scaffolding without prescriptive limitations. It occupies a practical middle ground between manual ear training and fully automated composition, functioning as analysis tool rather than decision-maker.
The plugin's tuning display, measuring deviations in cents and hertz from A440, adds utility for engineers working across varied source material or historical recordings. For experienced producers, TONIC 2 operates most effectively as a rapid reference layer rather than authoritative harmonic arbiter, particularly valuable during remix sessions or when contextualizing unfamiliar recordings within existing projects.