accompanist:
(also ‘accompanyst’; pronunciation: the letters ‘c’ and ‘c’ are said with a ‘k’ sound as in “king”)
an accompanist, Patrick Healy (L, sitting) playing the piano for Anthony Kearns, a popular Irish singer
a person who plays a musical instrument, especially a piano, in tune with a singer or a group (troupe) of singers,
e.g.
The success of a popular classic singer depends mostly on the talent of his/her accompanist.
Singers taking an audition are requested to bring in their own accompanists for their audition.

