Musical Key Cards

A high quality boxed set of reference cards for all musicians and educators

Available in the U.S. on, and worldwide as a Web App

KeySense Key Cards Web App KeySense Key Cards Deck

What are Key Cards ?

A 60 card deck of reference cards with details of all musical keys.

Covers 15 Major keys(black) + 15 Minor keys(green).

KeySense Circle of 5ths

What's shown for each Key ?

The cards follow the structure of the circle of 5ths.

Key relationships and signatures

Scale note names on Piano

3 Octaves on Bass and Treble clef

Diatonic scale chords

For Music Students..

60 cards packed with essential key information

Note Identification

The key's diatonic note names, and their staff positions across 3 octaves of the bass and treble clef.

Key Signatures

Sharp and Flat note position indicators on the bass and treble clef.

Key Relationships

The closest / most useful related keys for composition, on the Circle of 5ths.

Enharmonic key relationships (same sound/frequency, different note names).

Scale Degrees

Tonic, Supertonic, Mediant etc.

Chord Functions

Using roman numerals eg I, ii, III to name and identify the chord's purpose.

Piano Scales

For major keys, including Mode associated with each major scale degree eg. 1/Ionian

For minor keys, the natural, harmonic and melodic minor note names.

Diatonic Chords

The note names used in triad, 7ths, 9th, 11th and 13 chords.

KeySense Key Cards Sheet Music

For Musicians

Mastering your keys will gain you adaptability, flexibility, proficiency and a better ear.

KeySense Key Cards Instrument

For Music Teachers

A flexible, portable music theory reference resource.

  • Use as Drill cards
  • Use as Quiz cards
  • Use as Flash cards
  • Use as Game cards

As a Musical Gift

A compact, tidy, colorful, useful, boxed gift for any amateur or pro musician.

KeySense Key Cards Fan


All you need to Learn, Analyze, Compare, Compose and Transpose music in 30 Keys.

  • Premium Quality Cards (330 gsm), as used in Casinos.
  • 60 Card Deck (120 faces) + index cards + Major/Minor section cards
  • Detailed Design - each face is packed with essential music theory information
  • Standard U.S. Poker sized cards, for easy handling
  • German card stock, superior smooth, high gloss, deep color finish
  • Sturdy Box with linen/gloss finish, for protection, storage, and a long life


KeySense Key Cards Web App

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Questions ?

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