Scale, Chord and Interval Tools

These tools answer everyday theory questions: which notes are in a scale, what a chord is called, what interval lies between two notes and which frequency a note has. The scale pages cover jazz, diminished, altered, bebop, Arabic and Hungarian minor scales as well as the overtone series.

Tools in this group

• Altered Scale — Altered scale (super Locrian) in every key: notes, step pattern, staff and keyboard, with sound. Pick any tonic to see it. Free, no sign-up.
• Arabic Scale — Arabic scale notes in any key: the double harmonic major scale and Phrygian dominant, with the step pattern, staff, keyboard and sound. Free.
• Chord Identifier — Chord finder and identifier: click piano keys, type notes like E G C or enter guitar frets to get the chord name, inversion, spelling, staff and sound.
• Chord Progression Generator — Chord progression generator: pick a key and a progression such as I-V-vi-IV or 12-bar blues, see the chords and notes, hear them, and print every key.
• Chord Transposer — Chord transposer: paste a chord sheet, shift it up or down any number of semitones or to a new key. Keeps chords above the right words. Copy or print.
• Diminished Scale — Diminished scale in every key: whole-half and half-whole notes, step pattern, staff and keyboard, with sound. Pick a tonic to see it. Free.
• Interval Calculator — Interval calculator: pick two notes to get the interval name, semitones and inversion, or add an interval to a note. Hear it, see it, print the table.
• Jazz Scales — Jazz scales in any key: Dorian, Mixolydian, melodic minor, Lydian dominant, altered, whole tone, diminished, bebop and blues. Notes, staff, sound.
• Note Frequency Calculator — Convert note names to Hz, MIDI and piano key numbers (A4 adjustable), find the nearest note and cents for any frequency, and print all 88 key frequencies.
• Overtone Series Calculator — Overtone series calculator: enter a fundamental frequency to get its harmonics with the nearest note, cents off and interval. Hear each one.
• Scale Finder — Scale finder: pick a tonic and scale type to see its notes, step pattern, staff and chords, or enter notes to find every scale that contains them.