V-CVbav-ms-Capp.Sist.45: Composer name in ms (index) = 'Brumel' / Composer name in ms = 'A. Brumel' / Title as in ms (index) = 'Missa de Ut re mi fa sol la' / Kyrie I: [Tenor]: 'Ut re mi fa sol la' / [Tenor]: 'Christe tacet' / [Tenor]: 'Qui tollis tacet' / Patrem: [Tenor]: 'Canon. Quanta est t[em]p[o]rib[u]s r[egu]la ta[n]ta modis' & 'Resolutio'; The tenor has 4 different mensuration signs and must sing the hexachord 4 times, applying each of those mensurations in turn / [Tenor]: 'Crucifixus tacet' / Et iterum: [Tenor]: Canon and 'Resolutio'; The cantus firmus has 4 different mensuration signs, which must be applied in turn / [Tenor]: 'Pleni tacet' / [Tenor]: 'Benedictus tacet' / Agnus II: [Superius]: 'Scinde vestimenta tua redeundo' and 'Resolutio' / Agnus III: [Superius]: 'Resolutio'