1784 in music

Events

• January 5 – In Paris, Antonio Salieri signs a contract with the Opéra for a work entitled Les Danaïdes.
• January 7 – Composer Pierre-Alexandre Monsigny marries Amélie de Villemagne.
• February 9 – The Piano Concerto No. 14 becomes the first entry in the catalogue of works by Wolfgang Amadeus Mozart.
• March – 28-year-old Mozart gives the first performances of his Piano Concerto No. 15 at the Trattnerhof and Burgtheater in Vienna.
• April 24 – Mozart writes to his father Leopold, recommending the work of newcomer Ignaz Pleyel.
• April 29 – Wolfgang Amadeus Mozart and violinist Regina Strinasacchi perform Mozart's Sonata in B-flat for Violin and Keyboard for the first time, in the presence of Joseph II, Holy Roman Emperor.
• May 27 – June 5 – Handel Commemoration concerts in Westminster Abbey, London.
• June 13 – Wolfgang Amadeus Mozart's Piano Concerto No. 17 is performed for the first time, by his student, Barbara von Ployer. Giovanni Paisiello is in the audience.
• August 17 – Luigi Boccherini is given a pay rise of 12000 reals by his employer, the Infante Luis, Count of Chinchón.
• August 28 – In Vienna, Johann Georg Albrechtsberger's Mass in E flat is performed for the first time, with the orchestral arrangement replaced by organ accompaniment, in accordance with the preferences of Joseph II, Holy Roman Emperor.
• December 11 – Mozart is received into the Masonic lodge "Beneficence".
• The first opera is mounted at the unfinished Teatro Nuovo in Bergamo, Lombardy, Giuseppe Sarti's Medonte, re di Epiro.

  Classical music

• Jean-Jacques Beauvarlet-Charpentier – Journal d'orgue 1–9
• Niel Gow – A Collection of Strathspey Reels, etc.
• Joseph Haydn
• *6 Divertimentos, Hob.IV:6–11
• *Keyboard Sonata in G major, Hob.XVI:40
• *Keyboard Sonata in B-flat major, Hob.XVI:41
• *Keyboard Sonata in D major, Hob.XVI:42
• *24 Lieder, Hob.XXVIa:13–24
• Michael Haydn – Symphony in B-flat major; Symphony in C major
• Sabine Hitzelberger – Für fülende Seelen am Klavier
• Edward Jones – Musical and Poetical Relicks of the Welsh Bards, including "Deck the Halls"
• Leopold Kozeluch – Keyboard Concerto in F major, P.IV:1
• Wolfgang Amadeus Mozart
• *Piano Concerto No. 14
• *Piano Concerto No. 15
• Giovanni Paisiello – Six quartets, Op. 1
• Joseph Reicha – Cello Concerto in D major
• Giovanni Battista Viotti – Duetto concertante for 2 Violins in D major; Duetto concertante for 2 Violins in D minor

  Opera

• Pasquale Anfossi – Issipile, May 8, King's Theatre, London.
• Luigi Cherubini – L'Idalide
• Domenico Cimarosa
• *L'apparenza inganna
• *Artaserse
• *I due supposti conti
• *I matrimoni impensati
• *L'Olimpiade, July 10, Teatro Eretenio, Vicenza.
• *La vanità delusa
• André Grétry
• *L'épreuve villageoise
• *Richard Coeur de Lion
• Joseph Haydn – Armida
• Thomas Linley – The Spanish Rivals
• Antonio Salieri
• *Les Danaïdes
• *Il ricco d'un giorno
• Andrea Luchesi – Ademira
• Giovanni Paisiello – Il Re Teodoro
• Niccolò Piccinni – Diane et Endymion
• Antonio Sacchini – Dardanus

  Births

• January 1 – William Beale, composer and organist
• January 27 – Martin-Joseph Mengal, composer
• January 29 – Ferdinand Ries, composer
• February 3 – John Fane, composer and diplomat
• February 27 – Job Plimpton, composer
• March 25 – François-Joseph Fétis, Belgian musicologist, composer, critic and teacher
• April 8 – Dionisio Aguado, guitarist and composer
• June 14 – Francesco Morlacchi, opera composer
• July 27 – George Onslow, composer
• August 5 – Louis Spohr, composer, violinist and conductor
• August 23
• *Jeanette Wässelius, operatic soprano
• *Henriette Löfman, composer
• October 15 – Thomas Hastings, composer
• November 7 – Friedrich Wilhelm Kalkbrenner, German pianist and composer
• date unknown – Samuel Simms, organist and composer

  Deaths

• March 4 – Ann Cargill, opera singer
• July 1 – Wilhelm Friedemann Bach, composer
• August – Louis Anseaume, opera librettist
• August 6 – Karl Kohaut, lutenist and composer
• August 4 – Giovanni Battista Martini, composer
• September
• *John Bennett, organist and composer
• *Maria Linley, singer
• September 12 – Manuel Blasco de Nebra, organist and composer
• October 5 – Antonín Kammel, violinist and composer
• November 6 – Anine Frölich, ballet dancer
• date unknown
• *John Pixell, poet and composer
• *Yekaterina Sinyavina, pianist and composer