Basic Music Theory
| Key | # | Key | b | ||
| C | 0 | C | 0 | ||
| G | 1 | F# | F | 1 | Bb |
| D | 2 | F#, C# | Bb | 2 | Bb, Eb |
| A | 3 | F#, C#, G# | Eb | 3 | Bb. Eb. Ab |
| E | 4 | F#, C#, G#, D# | Ab | 4 | Bb. Eb. Ab, Db |
| B | 5 | F#, C#, G#, D#, A# | Db | 5 | Bb, Eb, Ab, Db, Gb |
| F# | 6 | F#, C#, G#, D#, A#, E# | Gb | 6 | Bb, Eb, Ab, Db, Gb, Cb |
| C# | 7 | F#, C#, G#, D#, A#, E#, B# | Cb | 7 | Bb, Eb, Ab, Db, Gb, Cb, Fb |
There is an effective mnemonic device to remember the order of the sharps and flats. For the sharps use the sentence: Father Charles Goes Down And Ends Battle. For the flats use the variation: Battle Ends And Down Goes Charles' Father.
| C Major | A Minor | Am | Dm | E7 |
| D Major | B Minor | Bm | Em | F#7 |
| Eb Major | C Minor | Cm | Fm | G7 |
| F Major | D Minor | Dm | Gm | A7 |
| G Major | E Minor | Em | Am | B7 |
| Ab Major | F Minor | Fm | Bbm | C7 |
| Bb Major | G Minor | Gm | Cm | D7 |