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Three early motets

David Burn

Isaac is first documented, already as an adult, in a casual payment from September 1484, at the Innsbruck court of Duke Sigismund of Tyrol.[2] Whether he was just passing through on the way from his native Low Countries to his first permanent appointment in Italy or whether he had had longer-term central-European connections is not clear. It is possible that his visit had something to do with the sumptuous wedding of Archduke Sigismund in February 1484: Isaac’s paymaster in September was the main organiser of the wedding ceremonies, court councillor and humanist Johannes Fuchsmagen (» I. Humanisten). The oldest source for any of Isaac’s music dates from around the same time, and probably comes from the same place: the so-called Nicolaus Leopold Codex (» D-Mbs Mus. ms. 3154), a large composite manuscript assembled between the mid-1460s and c. 1511 (» F. Geistliche Mehrstimmigkeit), which contains three of Isaac’s motets in a layer probably written in Innsbruck in the early 1480s (» Abb. Argentum et aurum).[3] The motets show intimate familiarity with central European musical styles. All three are based on plainchant melodies, and all are distinct in presenting their chant models multiple times.[4]

 

 

Argentum et aurum sets an antiphon for St. Peter and Paul in long, equal notes, first in the top voice, then in the bass, then in the tenor (» Abb. Argentum et aurum; » Hörbsp. ♫ Argentum et aurum). Ecce sacerdos magnus, setting an antiphon for a confessor bishop, presents its base melody twice between voice pairs in strict imitation, and finally spread phrase by phrase between all four voices. The final motet, setting the Marian sequence Inviolata, integra, et casta es Maria, is more ambitious, in five voices, and with two of the inner parts presenting the chant melody in canon. Unfortunately no surviving source preserves the second contratenor voice. However, analysis allows the missing voice to be reconstructed with relative security.[5]

[2] Staehelin 1977, vol. 2, 19; Picker 1991, 4; Senn 1954, 10.

[3] More recent research confirms the date of c. 1476 originally proposed by Thomas Noblitt for the three motets, see » K. 7 The Codex of Nicolaus Leopold. » D-Mbs Mus. ms. 3154 is viewable online at: http://daten.digitale-sammlungen.de/~db/0005/bsb00059604/images/; Isaac’s motets are on fol. 72v, fol. 73v, and fol. 74v. Modern edition: Noblitt 1987–1996. On dating, see Rifkin 2003, 294–307. On possible identities of the scribes, see Strohm 1993, 519 ff. (though doubted in Rifkin 2003, 285 n. 103). See also » F. Regionalität und Transfer.

[4] See, further, Strohm 1993, 526; Kempson 1998, esp. vol. 1, 29–35, 92–106; Strohm/Kempson 2001.

[5] Cumming 2011, with reconstructed score at 268–274.