All liturgies have an elevation of the Blessed Sacrament, just before the communion, showing the people, as an act of reverence, what they are about to receive.
This elevation was already in use at the time of the Apostolic Constitutions.
In the Roman Rite of Mass, the elevation is accompanied by the words Ecce Agnus Dei. Ecce qui tollit peccata mundi (Behold the Lamb of God. Behold him who takes away the sins of the world), echoing the words of John the Baptist in John 1:29
The “ligadura” in musical notation is a sign of prolongation in the form of a curved line that connects the heads of two consecutive notes of the same height, although not necessarily of the same value. It indicates that they will be reproduced as a single note with a duration equal to the sum of the values of the individual notes. For example, a black linked to a white has the total value of a dotted white.
The musical form in this case expresses a feeling of waiting and expecting; the upward lines in the music indicating the almost trembling expectation of receiving the bread and wine; symbols of the body and blood of Christ.
I uploaded this piece before, but time changed my idea about it.