Johann Joseph Fux
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Johann Joseph Fux (German: [ˈfʊks]; c. 1660 – 13 February 1741) was an Austrian composer, music theorist and pedagogue of the late Baroque era. He is most famous as the author of Gradus ad Parnassum, a treatise on counterpoint, which has become the single most influential book on the Palestrinian style of Renaissance polyphony. Almost all modern courses on Renaissance counterpoint, a mainstay of college music curricula, are indebted in some degree to this work by Fux.
Fux was born to a peasant family in Hirtenfeld, Styria, Austria. Relatively little is known about his early life, but likely he went to nearby Graz for music lessons. In 1680 he was accepted at the Jesuit university there, where his musical talent became apparent. From 1685 until 1688 he served as organist at St. Moritz in Ingolstadt. Sometime during this period he must have made a trip to Italy, as evidenced by the strong influence of Corelli and Bolognese composers on his work of the time.
By the 1690s he was in Vienna, and attracted the attention of Emperor Leopold I with some masses he composed; the emperor was sufficiently impressed by them to assist him with his career after this point. In 1698, Leopold hired him as court composer. Fux traveled again to Italy, studying in Rome in 1700; it may have been here that he acquired the veneration for Palestrina which was so consequential for music pedagogy.
Fux served Leopold I until his death, and two more Habsburg emperors after that: Joseph I, and Charles VI, both of whom continued to employ him in high positions in the court. Fux was famous as a composer throughout this period, his fame being eclipsed only later in the 18th century as the Baroque style died out. Although his music until recently never regained favor, his mastery of counterpoint influenced countless composers through his treatise Gradus ad Parnassum (1725). Haydn largely taught himself counterpoint by reading it and recommended it to the young Beethoven. Mozart had a copy of it that he annotated.
Gradus ad Parnassum
The Gradus ad Parnassum (Steps or Ascent to Mount Parnassus) is a theoretical and pedagogical work written by Fux in Latin in 1725, and translated into German by Lorenz Christoph Mizler in 1742. Fux dedicated it to Emperor Charles VI.
The work is divided into two major parts. In the first part, Fux presents a summary of the theory on Musica Speculativa, or the analysis of intervals as proportions between numbers. This section is in a simple lecture style, and looks at music from a purely mathematical angle, in a theoretical tradition that goes back, through the works of Renaissance theoreticians, to the Ancient Greeks. Fux explains that intervals in exact mathematical proportions result in larger and smaller half tones, and he also mentions that some organists added extra keys (split halves to use smaller and bigger half tones), but that adding extra keys on a keyboard was problematic and for this reason they divided every note in "zwei gleiche Theilen" (two equal parts), resulting in equal temperament. He continues:
"Da man aber erfahren, daß solches in Zahlen nicht angeht, ist das Ohr zu hülfe genommen worden, indem man von dem einem Theil einem fast gar nicht mercklichen Theil weggenommen, und dem andern zugesetzet" 
"Because experience told us that one cannot do this by means of figures, the ear was called in to help, by taking away an almost non-detectable amount from one note and adding it to the others."
The second part, on Musica Pratica, is the section of this treatise where the author presents his instruction on counterpoint, fugue, double counterpoint, a brief essay on musical taste, and his ideas on composing sacred music, writing in the a cappella and in the recitativo style. This part is in the form of a dialog, between a master (Aloysius, Latin for Luigi, who is meant to represent Palestrina's ideas) and a student, Josephus, who represents Fux himself, a self-admitted admirer of Palestrina. At the outset, Fux states his purpose: "to invent a simple method by which a student can progress, step by step, to the heights of compositional mastery..." and gives his opinion of contemporary practice: "I will not be deterred by the most passionate haters of study, nor by the depravity of the present time." He also states that theory without practice is useless. Thus, his book stresses practice over theory.
While Gradus ad Parnassum is famous as the origin of the term "species counterpoint", Fux was not the first one to invent the idea. In 1610, Girolamo Diruta, a composer of the Venetian school, published Il Transilvano, which presented the Renaissance polyphonic style as a series of types: one note against one note, two notes against one note, suspensions, and so forth. Fux's work repeated some of Diruta's, possibly coincidentally, since he is not known to have had a copy. In any event, Fux presented the idea with a clarity and focus which made it famous as a teaching method.
In species counterpoint, as given in Fux, the student is to master writing counterpoint in each species before moving on to the next. The species are, in order, note against note; two notes against one; four notes against one; ligature or suspensions (one note against one, but offset by half of the note value); and florid counterpoint, in which the other species are combined freely. Once all the species are mastered in two voices, the species are gone through again in three voices, and then in four voices. (Occasionally, in modern counterpoint textbooks, the third and fourth species are reversed with suspensions being taught before four notes against one.) Fux expressed the intention of adding sections on how to write counterpoint for more than four parts, indicating that rules in this area were to be "less rigorously observed". However, citing his poor health as a result of gout and age, he chose to conclude the book as it stood.
Even though Fux made a number of errors, particularly in his description of third species (four notes against one) in which he allowed for idioms that do not belong to the 16th century, but rather to the 18th, modern counterpoint education is greatly indebted to Gradus ad Parnassum as the codex of the five species. Most subsequent counterpoint textbooks have taken Fux as their starting point, from the book by Albrechtsberger (Gründliche Anweisung zur Komposition) to 20th century examples such as the book by Knud Jeppesen (Counterpoint: The Polyphonic Vocal Style of the Sixteenth Century).
The Latin edition of Fux's Gradus ad Parnassum from the year 1725 is the only surviving book of J.S. Bach's personal library of theoretical works.
Fux also composed church music (Missa canonica, Missa Christi Corporis, Requiem K 51–53, Magnificat K 98, De Profundis), oratorios (Il della Fonte Salute), operas (Julo Ascanio, re d'Alba, 1708; Orfeo ed Euridice, 1715; Angelica, vinditrice di Alkina, 1723 – an example of the Colossal Baroque style; Costanza e Fortezza, 1723), and instrumental pieces (collected in his Concentus musico-instrumentalis, 1701).
Fux's compositions were catalogued by Ludwig Ritter von Köchel.
- The Dresden Album. Johannes Pramsohler. Ensemble Diderot. (Audax Records ADX 13701)
- Concentus musico instrumentalis...1701. Concentus musicus Wien, Nikolaus Harnoncourt (Teldec 8.42171 XH, 244 690 2)
- Article Johann Joseph Fux, in The New Grove Dictionary of Music and Musicians, ed. Stanley Sadie. 20 vol. London, Macmillan Publishers Ltd., 1980. ISBN 1-56159-174-2
- Fux, Johann Joseph; Mann, Alfred; Edmunds, John (1965). The Study of Counterpoint from Johann Joseph Fux’s Gradus ad parnassum. New York: W.W. Norton & Co. ISBN 0-393-00277-2. OCLC 494781. LCC MT40 F83 1965
- Jeppesen, Knud (1992) . Counterpoint: the polyphonic vocal style of the sixteenth century. trans. by Glen Haydon, with a new foreword by Alfred Mann. New York: Dover. ISBN 0-486-27036-X.
- Johann Joseph Fux, Gradus Ad Parnassum. Facsimile of the 1725 Vienna edition. Monuments of Music and Music Literature, Broude Brothers, NY, 1966.
- Fux, Johann Joseph by Harry White (text, bibliography), Thomas Hochradner (work-list)
- Willem Kroesbergen and Andrew Cruickshank: 18th century quotes on J.S. Bach's Temperament. 
- Michael Lorenz: "Fux Documents" (Vienna, 2016)
- Media related to Johann Joseph Fux at Wikimedia Commons
- Free scores by Johann Joseph Fux at the International Music Score Library Project
- Free scores by Johann Joseph Fux in the Choral Public Domain Library (ChoralWiki)
- Fux's remarks on tuning and temperament can be found in the chapter Fux in the article '18th century quotes on J.S. Bach's Temperament'.