Zplane Tonic

Key and Scale Detection Plugin

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  • Regular price $45.29
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Apple Silicon Compatible
AAX Native - Compatible with Pro Tools 11 and above
AudioUnits Format VST3 Format
MacOS Logo
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TONIC by zplane is a new music theory plugin that helps musicians, producers, and beatmakers to identify the key of any audio recording and show the notes and chords that are compatible with that key. Use cases range from identifying the key in a remix project, making samples from your record collection fit together to naming the key in music performances that you recorded on your own.

Find the key of your loops, remixes, and song ideas with TONIC by zplane. Use the AI-powered music theory plugin to find the scales and chords that work with your music.

Put the TONIC plugin on any audio track and hit play in your DAW. TONIC will analyze the sound in real-time and present you with up to three suggested keys with a graphical representation showing the confidence level. Fold out the keys panel and try out notes and chords for the suggested keys to find the perfect fit.

Add bass, melody, or harmony to your tracks with ease when knowing the key, scale, and chords that work well with your recordings and samples.


  • Detect the key in any audio recording
  • Explore the compatible scale and chords with the fold-out Keyboard View Mono and Stereo operation
  • Reference tuning detection for recordings that deviate from A440
  • Offline mode - detect the key before loading audio into samplers

System Requirements

  • MacOS 10.15 Catalina - 11.6 Big Sur
  • Windows 10
  • Intel, AMD, or Apple Silidon CPU

Plugin Formats

AAX Native, AU, VST3

User Manual