Vi Hart "What is up with Noises? (The Science and Mathematics of Sound, Frequency, and Pitch)" - https://www.youtube.com/watch?v=i_0DXxNeaQ0
- Chords and Cords joke.
- For example, a C♯ cannot substitute for a D♭, even though in equal temperament they are identical pitches, because the D♭ can serve as the minor third of a B♭ minor chord while a C♯ cannot, and the C♯ can serve as the fifth degree of an F♯ major scale, while a D♭ cannot.
- Harmonic Series and Vibrations
- Flimshaw and excuses!
- Musical Shape
- 2 or more notes
- And now, Tips for single guys from Justine
- note that this may also apply to some girls.