In music|lang=en terms the difference between pitch and unpitched
is that pitch
is (music) in an a cappella group, the singer responsible for singing a note for the other members to tune themselves by while unpitched
is (music) without pitch.
As a noun pitch
is a sticky, gummy substance secreted by trees; sap or pitch
can be a throw; a toss; a cast, as of something from the hand or pitch
can be (music) the perceived frequency of a sound or note.
As a verb pitch
is to cover or smear with pitch or pitch
can be (senseid
)to throw or pitch
can be to produce a note of a given pitch.
As an adjective unpitched is
not having been pitched.