CELEBRATION is music in the style of the Jewish hora, that is, "dance music." Sing the tune with enthusiasm, beginning more slowly, and increasing the tempo for each repetition or new stanza. The accompaniment is best played with piano and/or guitars. The exuberant character of this music also invites hand clapping and the use of other instruments such as strings and tambourines. The descant may be performed instrumentally (on violin or oboe, for example) at pitch or an octave higher. This descant is unusual because it lies below the main tune much of the time. Once the congregation knows the melody, direct the whole choir to sing the descant in octaves.

--Psalter Hymnal Handbook