D D D D D D
D D D D D D D D D D D
A A A A A D D D D D D D D D D D
E A A A A A A D D D D D D D D D D D D D
E E E A A A A A A A D D D D D D D D D D D D D
E E E E E A A A A A A A D D D D D D D D D D D D D D
E E E E E E A A A A A A A A D D D D D D D D D D D D D D
E E E E E E E E A A A A A A A A D D D D D D D D D D D D D D D
E E E E E E E E E A A A A A A D D D D D D D D D D D D D D D D D
E E E E E E E E E E E A A A A A A D D D D D D D D D G G G D D D D A
E E E E E E E E E E E E A A A A A A D D D D D D D D G G G D D D D A A
E E E E E E E E E E E E A A A A A A A D D D D D D D G G G G D D D A A A
E E E E E E E E E E E E E A A A A A A D D D D D D D D G G G D D D D A A A
E E E E E E BmE E E E E E A A A A A A A D DmD D D D D G G G D D D D A A A A
BmE EmE E E BmE E EmE E B E A A A A A A A DmD D D D G G G G G G D D A A A A A
BmE E EmE E B E E EmE E B E A A A A A A A DmDmD D D G G G G G G D D D A A A A
B E E EmEmE B E E EmEmE BmE A A A A A A A A DmDmD D D G G G G G D D D A A A A A
B E BmE EmE BmE E EmEmE BmB E A A A A A A A DmDmD D D G G D G G D D D A A A A A
BmB E E EmE BmB E EmEmEmBmB E A A A A A A A D DmD D D G G D G G D D D A A A A A A
BmB E E EmEmBmB BmEmE EmBmB E A A A A A A A D DmDmD D G G D G G G D D A A A A A D
BmB BmEmEmEmBmE E EmE EmBmB E A A A A A A A A DmDmD A G G G D G G D D A A A A A A
BmE E E EmEmBmE B EmE EmBmB B A A A A D A AmA D DmD A D GmG D G G D D A A A A A A A
BmE B E EmEmB BmB EmE EmBmB E E A A A D A AmA DmDmD A D G G D G G D D A A A A A A A
BmE B E EmEmB BmB EmE EmBmB E E A A A D A AmA DmDmD A D G G D G G D D A A A A A A A
Legend: (Cm is C-minor)
| Gb |
Db |
Ab |
Eb |
Bb |
F |
C |
G |
D |
A |
E |
B |
F# |
C# |
G# |
D# |
A# |
(darker shades of the same color indicate lower confidence level) |
Keyscape of Light and Darkness
In the bottom line of the illustration above, the music is divided into 42 slices of equal duration.
For each slice the best matching key is calculated.
Then, the duration of the slices is increased for each subsequent higher line in the
picture. Until, in the top line, each slice covers almost the entire piece.
The shade of a color represents the confidence level of the computed key. Brighter shades have higher
confidence level and darker shades have lower confidence level.
It appears that the music may be best divided into three parts with keys E, A and D. (the sixth line from the top)
(The presented score of Light and Darkness is in D in its entirity)
To be more precise: The entire piece has 211 measures. In the bottom line each slice covers 211 / 42 = 5 measures.
In the top line only 6 squares are drawn. The slice width there is: 211 - (6 * 5) = 181 measures. The horizontal
axis is a linear representation of time. Each square at the same horzontal position occurs at the same time. "Occurs"
means the time of the centre measure of the slice that the square represents.