Music Theory Lessons
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[TOC]
Lesson #1 - Intervals
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> **Definition:** The distance between two notes.
| Semitones | Min/Maj/Per | Short | Aug/Dim | Short | Alternative | Short |
|:---------:|:--------------:|:-----:|:-----------------:|:------:|:------------------------------:|:-----:|
| 0 | Perfect unison | P1 | | d2 | | |
| 1 | | m2 | Augmented unison | A1 | Semitone, Half tone, Half step | S, H |
| 2 | | M2 | | d3 | Tone, Whole tone, Whole step | T, W |
| 3 | | m3 | | A2 | | |
| 4 | | M3 | | d4 | | |
| | | | | | | |
| 5 | Perfect fourth | P4 | | A3 | | |
| 6 | | | | d5, A4 | Tritone | TT |
| 7 | Perfect fifth | P5 | | d6 | | |
| | | | | | | |
| 8 | | m6 | | A5 | | |
| 9 | | M6 | | d7 | | |
| 10 | | m7 | | A6 | | |
| 11 | | M7 | Diminished octave | d8 | | |
| 12 | Perfect octave | P8 | | A7 | | |
0 Perfect unison P1 Diminished second
1 Minor second m2 Augmented unison
2 Major second M2 Diminished third
3 Minor third m3 Augmented second
4 Major third M3 Diminished fourth
5 Perfect fourth P4 Augmented third
6
7 Perfect fifth P5 Diminished sixth
8 Minor sixth m6 Augmented fifth
9 Major sixth M6 Diminished seventh
10 Minor seventh m7 Augmented sixth
11 Major seventh M7 Diminished octave
12 Perfect octave P8 Augmented seventh
Lesson #2 - Scales
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> **Definition:** Set of notes
a.
Lesson #3 - Keys (Key Signitures)
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> **Definition:** Set of notes that are related to each other by their intervals and have a tonic note.
a.
Lesson #4 - Chords
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> **Definition:** Two or more notes played simultaniously.
a.
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