Ornamentation
- There is a thorough survey in NGDO3, 760–773, “Ornamentation,” by
 Andrew V. Jones and Will Crutchfield. Many musical examples and a three-
 column bibliography. Another source, already mentioned, has good coverage
 for one period: Companion to Baroque Music(#62), 417–434, “Ornamenta-
 tion,” by David Fuller.
Instrumentation
- Weaver, Robert. “The Orchestra in Early Italian Opera.” JAMS17 (1964):
 83–89.
 Although instrument playing became more elaborate and idiomatic during the
 17th century, the role of the orchestra in opera diminished. Weaver does not
 accept the received explanation for this curiosity (economic restrictions pre-
 vented hiring larger numbers of players), holding for an aesthetic solution. As
 opera turned more to expression of emotions, the big brass orchestra became
 unsuitable. Composers preferred the “monochromatic string orchestra” as a
 setting for expressive singing.
- Rose, Gloria. “Agazzari and the Improvising Orchestra.” JAMS18 (1965):
 382–393.
 In Agostino Agazzari’s treatise Del sonare sopra ‘l basso con tutti li stromenti e
 dell’uso loro nel conserto (1607), there is a distinction between foundation
 instruments that present the harmony and ornamental instruments that impro-
 vise above it. Rose suggests that the players of improvising instruments may
 have read from chord sequences in a short score that showed them the vocal
 parts and figured bass. Indeed, many scores for 17th-century operatic numbers
 present only a continuo, requiring the orchestra to invent the melodies.
- Spitzer, John, and Neal Zaslaw. “Improvised Ornamentation in Eighteenth-
 Century Orchestras.” JAMS39 (1986): 524–577.
 Who improvised, with which ornaments, and under what circumstances? The
 custom was more prevalent in Italy than elsewhere. German practice is the best
 documented. The “demise of improvised ornamentation is seen as a crucial
 step in the evolution of the orchestra as an institution... .”
- Zaslaw, Neal. “Lully’s Orchestra.” In Colloque (#1127), 539–580.
 Despite the significance now assigned to Lully’s orchestra, “there are astonish-
 ingly few hard facts about his personnel.” Zaslaw explores instrumental prac-
 tice at opera, ballet, and concert. He disposes of some myths, notably the one
 about Lully stabbing himself fatally with a long baton. Between 1664 and
 1674 “a fascinating new instrumentation had come into being... the earliest
 form of what later acquired the name orchestra.” By orchestra, he means an
 ensemble based on doubled strings and winds, with stable instrumentation,
 and discipline. Lully’s was the first to meet most of these criteria. With 26
 plates.
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