What is the smallest interval between two notes?
A:whole step
B:quarter step
C:half step
D:eighth step
C: half step
In Western music, the smallest interval typically used is the half step (also known as semitone). A whole step is equivalent to two half steps. Quarter steps and eighth steps are not standard in Western music theory, but they can be found in some other musical traditions and are considered microtones, which are intervals smaller than a half step.