When the melody is evolved.....

[dwest2419]

When the melody is evolved around one note the note you landed on not what used to start with and what is the definition supposed to be called? Is it supposed to be tonality or tonal centre modal harmony or something?

For example, in the key of C

Starting ascending melody note over a G major chord D-C-B-A to G
Starting descending melody note over a C major chord C-D-E-F to G

[Malcolm]

When the melody is evolved around one note the note you landed on not what used to start with and what is the definition supposed to be called? Is it supposed to be tonality or tonal centre modal harmony or something?

For example, in the key of C

Starting ascending melody note over a G major chord D-C-B-A to G
Starting descending melody note over a C major chord C-D-E-F to G

I'm not sure what you are asking. See if this will help. http://www.music.vt.edu/musicdictionary/

[Color of Music]

Modulation?

If the melody is centered around C, but no longer isn't - I'm now in Db - I have gone to a new key center.

On second thought, what I think you're really asking relates to how the Circle of Fifths (or Fourths) functions in a linear fashion.

It works like this:

Starting from C, the first half relates to C, but the second of relates to G. For visual reference, the lighter shows how it connects to the darker which means to stop.

Sharps go by Fifths (They have five letters per string)

Observe:

C-D-E-F-G

G-A-B-C-D

D-E-F#-G-A

A-B-C#-D-E

E-F#-G#-A-B

B-C#-D#-E-F#

F#-G#-A#-B-C#

It continues, but since we only go up to seven accidentals (including flats), there's no point in continuing. (bolded color means stop)

Now, using flats (going by Fourths. There are only four letters in each string)

Starting on C:

C-D-E-F

F-G-A-Bb

Bb-C-D-Eb

Eb-F-G-Ab

Ab-Bb-C-Db

Db-Eb-F-Gb

Gb-Ab-Bb-Cb