Question

A unison interval occurs between two notes that are

A. one octave apart.
B. identical in length.
C. played at the same time.
D. identical in pitch.

Answer 1

D. identical in pitch.

Step-by-step explanation:

Unison or perfect unison may assign to the period produced by a tone and its duplication, for instance C–C, as distinguished from the other, C–D, etc. In the unison the pair tones have the proportion of 1:1 or 0 halfway actions and zero pence. Although two tones in unison are supposed to be the corresponding tone, they are yet observable as arising from separate origins, whether performed on devices of a separate variety: About this note play unison on C, piano and guitar (help·info); or of the equivalent model: Regarding this sound execute unison on C, two uprights (help·info). This is because a couple of sounds in unison originate from separate scenes or can have distinct "casts" (pitches), i.e. develop from various artistic tools or human sounds.

Answer 2

A unison interval occurs between two notes that are (D) identical in pitch. They can also be played at the same time with an identical length one octave apart, however not always necessary.