Music Theory
While you don't need to know any music theory to use EarBoost, the following basic music theory may prove useful for reference.
Notes
Notes contain two elements pitch and octave. Notes are the building blocks of music. Chord and Scales are both composed of notes. A root note is usually the lowest note of a scale or chord.
Intervals
Intervals come in two varieties: melodic and harmonic.
Melodic intervals are when the intervals are played sequentially.
Harmonic intervals are when the intervals are played simultaneously, like a chord
| Interval | Distance |
| Unison | 0 |
| Minor Second | 1 |
| Major Second | 2 |
| Minor Third | 3 |
| Major Third | 4 |
| Perfect Fourth | 5 |
| Diminished Fifth | 6 |
| Perfect Fifth | 7 |
| Minor Sixth | 8 |
| Major Sixth | 9 |
| Minor Seventh | 10 |
| Major Seventh | 11 |
| Octave | 12 |
Chords
Chords are two or more notes played simultaneously. Chords are assembled by use of a formula to determine the notes which they should contain. Each chord has a Key, this is the root note. The formula would then be named as Major, Minor etc. For example the formula for to make a Major chord is the root note then a distance of an intervallic major third, then a fifth from the root. This gives your the notes C-E-G. A minor chord would differ in that a minor third interval is used giving you the notes C-Eb-G. A set of chords can have a key.
Scales
Scales are a combination of notes played sequentially. The different formulas used yield different notes, and therefore different scales. Scales are often used to construct a melody over chords. The particular chords usually define the scale to use. In particular the key of a song is used to identify the recommended scale to choose.