Dec 07, 2010  · In music, what is it called when 2 people sing different lyrics at the same time, and in the same key?. 2 or more lines of different text sung at the same time It’s probably both, since the lead singer probably isn’t singing the. Oct 25, 2017. Table of Musical Frequencies. Note C C# D D# E F F# G G# A A# B. On a violin…