Is a Db to a Eb a half step or a whole step

In the example using “C” as the root, Db is a half step above C, Eb is a whole step above Db, E is a half step above Eb, F# is a whole step above E, and so on.

Explanation:

they are often in theme and variations

earliest

neumes above text

neumes

colored lines

neumes

4-line staff

f, c, or g clef

notes on 5-line staff with clef

mensuration (longas and breves)

time signature (perfect or half circle)

most recent

notes on 5-line staff

modern clefs

modern note values (whole, half, quarter, and so on)

modern time signature

italian words and abbreviations for dynamics and tempo

staccato, slurs, and so on