What "Where's the music?" means

Yet another Christmas event proved to be an eye-opener for me personally.  I was asked to be co-director of an ecumenical service.  The other director was from Church in the Round, the large Church of God in Christ congregation.  We invited all the choirs in town to participate.  Those who rallied to the call were St. Titus Roman Catholic Church, Church in the Round, and our folk from Celebration / All Saints [Episcopal].  On the first night of rehearsal the Roman Catholics were asking, "So, where is the music?"  I was circulating the printed songs as they spoke.  The African American folk from Church in the Round were asking, "So, where's the music.  Sing us a tune."  I realized they could have cared less about what was on a piece [of] paper being passed around.  For them, the music was in the air ... Sing it, please.  Being all things to all people took on new meaning for me that Christmas.  Once again, music seemed to unite where systems failed; people from radically different backgrounds could sing the same song together - to the glory of God.  Again NBC showed up to film this ecumenical event.

Source: Betty Pulkingham  -  "This Is My Story, This Is My Song", Ch. 19, p. 183