① Look Up the Notes of a Chord
202 types can be searched by their information on any root note. It also shows the main related scales and substitute chords based on Negative Harmony theory.
You can look up the notes and details of 77 types scales in every key.
The main chords that contain the notes of a selected scale are also shown.
* If you want to search for a scale name from its notes → please use ③ Reverse Lookup for Chord/Scale Names.
* Guitarists and other string-instrument players → we strongly recommend using ⑩ Visualize a String Instrument Fretboard.
Choose any scale from the dropdown list.
Information related to the selected scale is displayed.
You can choose from four note-notation systems: English/American, Italian, Japanese, and German.
If you are a beginner, the Italian notation (Do, Re, Mi, ...) may feel more familiar.
Notes are colored relative to the selected tonic (root note), in a movable-do manner.
For example, the tonic (root note) is blue, and the perfect 5th is yellow.
Also, enharmonic notes share the same color.
For example, the major 3rd and the diminished 4th are both green.
Click (tap) the "Play" button, the keyboard, or a note name to play the scale's notes.
In "Common Chords Containing These Notes", clicking (tapping) a chord name also plays that chord.
To stop the sound while it is playing, click (tap) anywhere on the screen.
You can adjust the volume with the "Volume" bar.
- Check your device's "volume settings" and "mute settings".
- Check that the on-screen "Volume" bar is not set to 0.
- Try reloading the page.
If you still hear no sound after trying the above, we would appreciate it if you could let us know via the contact form.
This page does not make a strict distinction between enharmonic notes.
Reference article: Enharmonic Equivalents Explained [What Is the Difference Between C# and D♭?] (Japanese)
The information provided here may not be accurate.
Of course, we take the greatest care in publishing information and materials.
However, we cannot guarantee the accuracy of the published content.
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We accept no responsibility whatsoever, for any reason, for any damage arising in connection with the use or download of the information and materials published on this site.
It is a "number assigned to a set of three or more pitches (a scale set)," proposed by Allen Forte.
Scales sharing the same Forte number have the same "structure of scale notes".
For example, the major scale and the natural minor scale have the same pattern of intervals, just starting from a different position.
Therefore, the major scale and the natural minor scale are assigned the same Forte number, "7-35".
It is "a number obtained by expressing a scale's notes as a 12-digit binary number and converting it to decimal."
For example, let's take the C major scale (Do, Re, Mi, Fa, Sol, La, Ti).
If we mark the scale's notes as "1" and the other notes as "0", the C major scale can be written as "10101011010101".
We reverse this "10101011010101" to process it as a binary number.
Converting the reversed "101011010101" to decimal gives "2741", so the major scale's Scale number is "2741".
A "quartal chord" is a chord built by stacking notes a fourth apart, starting from the root note.
Here, "fourth" refers to the "perfect 4th" and the "augmented 4th" (since the "diminished 4th" is the enharmonic equivalent of the "major 3rd").
There is still no widely agreed-upon chord-name notation for quartal chords.
Therefore, the chord names used on this site are only one example and, at least as of 2024, cannot be called a common notation.
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◆ Substitute Chords, and the Concept of USTs and Hybrid Chords (Japanese)
An article summarizing how to think about substitute chords, USTs (upper structure triads), and hybrid chords.
◆ The Story of Making an App to Easily Explore Negative Harmony (Japanese)
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◆ How to Name or Notate Quartal Chords (YouTube)
◆ Blue Notes and Tonality: Fundamental Theory for Improvisation and Composition (Japanese)
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First edition: 2019/10/17
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| R | m2 | M2 | m3 | M3 | P4 | -5 | P5 | +5 | M6 | m7 | M7 |
| ♭9 | 9 | #9 | 11 | #11 | ♭13 | 13 | |||||
Every tool (web app) is completely free to use.
202 types can be searched by their information on any root note. It also shows the main related scales and substitute chords based on Negative Harmony theory.
Look up the details of 77 types in every key. It also shows the main related chords.
Search the chord and scale names that match the notes you select.
The MIDI-keyboard version is here.
A collection of 100+ chord progressions (effectively 1,000+ with all 12 keys supported).
They can also be displayed as degree (Roman numeral) names.
A list of diatonic chords. Switch between all 12 keys and check the tensions and modal scales for each chord.
A tool for exploring the relationships between keys. You can choose from 77 types as well as modes.
Calculates the values of 18 note types based on a given BPM. Each can be displayed in seconds, milliseconds, or microseconds.
Easily calculate the BPM at which two different notes share the same duration.
Transpose chord progression text into all 12 keys. It can also convert to degree (Roman numeral) names.
See the fretboard positions of chords and scales on a guitar. It also supports bass, multi-string instruments, and a left-handed display.
Reverse-search the chord and scale names that match the notes you select on the fretboard.
Identify chords and scales from the notes you play on a MIDI keyboard.
A metronome that can play a wide variety of meters. Since you enter meters as text, everything from 4/4 to complex odd meters is easy to set up and check!
A metronome that supports polyrhythms. Understand polyrhythms through both sound and visuals. You can set values from 1 to 32.
Read and play rhythms for your right hand, left hand, right foot, and left foot. Change one part at a time to practice coordination on the drums.
Check piano scales and finger numbers in a fingering chart for your scale practice.