melody
A single number, such as 38978567796588 does not constitute a progression.
sequence
tone cluster APEX
Colors can have countless tints and tones, as each color can be mixed with white (to create tints) or gray (to create tones) in varying degrees. For example, a single base color like blue can produce numerous tints (light blue, sky blue) and tones (slate blue, dusky blue) when adjusted. The exact number of tints and tones is virtually limitless due to the continuous nature of color mixing. Thus, while it's difficult to quantify, the variations are extensive and can be tailored to specific needs.
A chord.
melody
A series of single tones that add up to a recognizable whole is called a melody. It is also the what forms the main part of a song or piece of music
dummy
A single number, such as 38978567796588 does not constitute a progression.
melody....... (definition out of the book: The Enjoyment of Music by: Kristine Forney & Joseph Machlis)
Sounds consist of fundemental tones and overtones. A single frequency is a fundemental tone.
The guide tone lines for a chord progression are the notes that create the essential harmony and movement of the chords. They typically include the 3rd and 7th of each chord, which are the most defining tones.
progression
(chord) progression
A chord.
When quantities in a given sequence increase or decrease by a common difference,it is called to be in arithmetic progression.