The only six-voice Mass by the Spanish composer Sebastián de Vivanco (c. 1551-1622) in his Liber Missarum (1608) was based on the homonym motet in the manuscript source E-SAc LP 1 (also available here). As usual, Vivanco writes a tour de force in the Sanctus: the five-voice Benedictus has a Trinitas in unitate canon combined with a 2 in 1 canon (duo sunt in carne una).
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©2022 Jorge Martín