Music theory teaches us to see limitations as freedom.

Musical Notes

• Notes: C, D, C# blah blah blah
• Same notes of different pitches belong to the same “pitch class”.
• Octave: ABCDEF

• Octave equivalence states that all notes from the same pitch class appeal similarly to the human ear, albeit at a different frequency or pitch.
• Tones and semitones are defined by number of steps taken after playing one note and then another. \(B\to C\) is a semitone and so is \(E\to F\). Rest all adjacent letter transitions are tones.

• The above image denotes the C-major scale, the tonic of which is the C note.

Scales

• Diatonic scale: a scale composed of 5 tones and 2 semitones.
• When we change the order in which the five tones and two semitones occur, the scale sounds different. We could say it has a different quality**.
• The seven classic diatonic modes are those defined by the 7 letter notes.