A step-by-step guide to mastering Chorderizer.

Run the application using:

chorderizer

Or from source:

python -m chorderizer.chorderizer

Chorderizer follows a logical music theory path:

Select a Tonic (e.g., C, F#) and a Scale Type (e.g., Major, Harmonic Minor). This creates the harmonic foundation for all subsequent steps.

Choose the Extension Level and Inversion:

• Triads to 13ths: Control the complexity and "flavor" of each degree.
• Inversions: Move the bass to the 3rd, 5th, or 7th to change the chord's texture and bass motion.

View the generated chords, note names, and MIDI values. Use the Tablature Filter to display guitar fingerings for specific chord types.

You can export all diatonic chords sequentially or define a custom progression using Roman numerals:

• I-V-vi-IV (Classic Pop progression)
• ii:2-V:2-I:4 (Jazz II-V-I with custom durations)

• BPM & Velocity: Set the tempo and base dynamics.
• Humanization: Add randomization to the velocity to avoid a "robotic" sound.
• Dual Tracks: Add an automatic bassline instrument along with your chords.
• Performance Effects:
  • Arpeggio: Spread the notes across time (up, down, or up-down).
  • Strum: Add a millisecond delay between notes in a single block chord.

After generating a MIDI file, you can transpose your entire progression to a new key. The system will keep all your voicing and timing settings but move the notes to the target key.