What is the Chord Family Studio?

The Chord Family Studio is a free online chord family finder that shows every chord that belongs to a musical key in one place. Choose any of the 12 keys in major or minor and the studio instantly builds the full diatonic chord family of seven triads, lists the notes of each chord in Western letters and Indian sargam, draws every chord on its own two-octave piano keyboard and lets you hear it. It runs entirely in your browser, so there is nothing to install, no login and no file upload.

Key, mode and accidentals controls

Three dropdowns at the top set the Key, the Mode (major or minor) and the Accidentals. You can also tap any segment of the circle of fifths wheel to jump to that key, and tapping an inner segment selects the relative minor. The wheel rotates the chosen key to the top and lights up the seven chords that belong to its key signature, and the segment pulses whenever a chord plays, so the relationship between keys and chords is always visible.

The seven chords of every key

For each key the studio generates the seven diatonic triads from the major or natural minor scale formula and labels them with Roman numeral analysis such as I, ii, iii, IV, V, vi and vii° in a major key. The correct quality, major, minor or diminished, is applied to each degree automatically. Across 24 keys that is 168 chords, and every one is shown as a quick-tap chord strip plus a full detail card with the chord name, its notes and a highlighted piano keyboard.

Inversions and chord voicings

Switch between root position, first inversion and second inversion to see how the same chord changes shape on the keyboard. The chord names switch to slash notation, for example C/E or C/G, the highlighted keys move to the new voicing and the sound follows, which gives 504 chord voicings to explore. This makes the studio useful for learning smooth voice leading and for finding an easier hand position for a chord progression.

Key-aware note spelling

The Auto accidentals mode spells every note from the letter sequence of the selected key, so each letter appears once in the scale. In F sharp major the studio shows E sharp and the E sharp diminished chord instead of F, and flat keys such as E flat major use flats throughout. Chord names, summary chips, note labels and piano keys all follow the same spelling. You can also force Sharps, Flats or Mixed accidentals from the dropdown.

Western notes and Indian sargam

Each chord lists its notes in two rows, Western letter names and Indian sargam, with Sa, Re, Ga, Ma, Pa, Dha and Ni, including komal and teevra swaras. The sargam is calculated relative to the key you selected, so a student who thinks in swaras and a musician who reads chord charts can use the same screen.

Play chord, play family and tap to hear

Press Play chord to hear the selected chord, or Play family to hear all seven chords one after another, each highlighted on the wheel, in the chord strip and on its piano while it sounds, and finishing back on the tonic. You can also tap any chord card or any piano key to hear it, and the keys press down in sequence for a natural arpeggiated feel.

Sound engine and technical details

All sounds are synthesized live with the Web Audio API, using layered triangle, sine and sawtooth oscillators, attack and decay envelopes, a low-pass filter and a master compressor, so no audio files need to load. Choose a Piano, Pad or Pluck timbre. The audio engine unlocks on your first tap, so the first chord plays immediately even in browsers that block sound until a user gesture. The interface uses scalable SVG for the wheel and a container-based responsive layout, so it fills the width of any page or column and stays sharp and readable on phones, tablets and large desktop screens.

Who it is for

Beginners learning which chords fit a key, songwriters building progressions, pianists practising inversions, teachers explaining diatonic harmony and relative major and minor keys, and Indian music learners connecting chords with sargam can all use the Chord Family Studio as a fast reference and practice tool. It is free to use on indipiano.com.