1804 in music

This is a list of music-related events in 1804.

Events

 * January 1 – Johann Nepomuk Hummel's Concerto for trumpet and orchestra receives its première in Vienna, in the presence of Nicholas II, Prince Esterházy.
 * January 23 – François-Adrien Boieldieu becomes musical director at the court of Tsar Alexander I of Russia.
 * February 20 – Giovanni Paisiello is appointed Maestro di Cappella at Naples.
 * April 22 – Twelve-year-old Gioachino Rossini gives a concert at Imola.
 * May 8 – Seventeen-year-old Carl Maria von Weber becomes Kapellmeister at Breslau in Silesia.
 * May 14 – Napoleon proclaims himself emperor, causing Beethoven to tear up the title page of his recently completed Symphony No. 3 and rename it the Eroica.
 * September 18 – Composer Muzio Clementi marries 19-year-old pianist Caroline Lehmann, the daughter of Johann Georg Lehmann, director of the Royal Opera, Berlin. There is a 33-year age gap between bride and groom.
 * Nicolas Dalayrac is awarded the Légion d'honneur.

Classical music

 * Ludwig van Beethoven
 * Piano Sonata No. 22 in F major
 * Piano Sonata No. 23, Op.57
 * Symphony No. 2 (published; composed 1801–02)
 * Triple Concerto, Op.56
 * Gedenke mein!, WoO 130
 * Isabella Colbran – Cavatina di partenza
 * Jan Ladislav Dussek – Fantasia and Fugue for piano
 * Anton Eberl – Symphony in D minor, Op. 34
 * Johann Nepomuk Hummel
 * Rondo in E-flat major, Op. 11
 * Variations for piano Op. 15
 * Rondo-Fantasie, Op. 19
 * Mass in E-flat major, Op. 80
 * Leopold Kozeluch – Three Piano Sonatas
 * Niccolo Paganini – Divertimenti Carnevaleschi
 * Ferdinand Ries – Piano sonata in A minor, Op. 1 No. 2
 * Gioachino Rossini – 6 Sonate a quattro
 * Antonio Salieri – Requiem in C minor
 * Louis Spohr – Concerto for Violin No. 2 in D minor, Op. 2
 * Carl Maria von Weber
 * 6 Variations sur l'air de Naga de 'Samori', Op.6
 * 6 Lieder, Op. 30
 * Turandot, Op.37 (incidental music for Schiller's production)
 * Joseph Wölfl – Symphony in C major, Op. 41

Opera

 * Ludwig van Beethoven – Fidelio, Op.72 (composed; premiered 1805)
 * François-Adrien Boieldieu – Aline, reine de Golconde
 * Pierre Gaveaux – Le Mariage inattendu
 * Adalbert Gyrowetz – Selico
 * Ferdinando Paer – Leonora
 * Gaspare Spontini – Milton
 * Georg Joseph Vogler – Samori

Births

 * January 24 – Delphine de Girardin, lyricist and writer (died 1855)
 * January 25 – Antoni Edward Odyniec, librettist and writer (died 1885)
 * February 5 – Johan Ludvig Runeberg, lyricist and poet (died 1877)
 * March 14 – Johann Strauss I, Austrian composer (d. 1849)
 * March 30 – Salomon Sulzer, Austrian Jewish composer (d. 1890)
 * April 15 – Otto Friedrich Gruppe, lyricist and poet (died 1876)
 * May 13 – Aleksey Khomyakov, lyricist and philosopher (died 1860)
 * May 31 – Louise Farrenc, born Jeanne-Louise Dumont, French pianist and composer (d. 1875)
 * June 1 – Mikhail Glinka, Russian composer (d. 1857)
 * June 13 – Gustave de Wailly, librettist and writer (died 1878)
 * June 21 – Johann Gabriel Seidl, librettist and archeologist (died 1875)
 * July 14 – Julius Schuberth, German author and publisher, founder of Schuberth & Co. (d. 1875)
 * July 17 – Carl Ferdinand Becker, music collector and musician (died 1877)
 * August 19 – Christina Enbom, Swedish operatic soprano (d. 1880)
 * September 8 – Eduard Mörike, lyricist and poet (died 1875)
 * October 1 – Eduard Sobolewski, Polish-American violinist, composer and conductor (may have been born in 1808; d. 1872)
 * October 18
 * Alexandre Charles Fessy, composer and musician (died 1856)
 * Joseph-Bernard Rosier, librettist and playwright (died 1880)
 * November 27 – Sir Julius Benedict, German-born conductor and composer (d. 1885)
 * date unknown – Ferdinand Giovanni Schediwy, Czech-born organist, conductor and composer (d. 1877)

Deaths

 * March 29 (or 30) – Ivan Khandoshkin, violinist and composer (b. 1747)
 * June 16 – Johann Adam Hiller, conductor, composer and music writer (b. 1728)
 * July 17 – Christian Ernst Graf, composer and kapellmeister (born 1723)
 * August 24 – Valentin Adamberger, operatic tenor (b. 1740)
 * November 5 – Maria Anna Adamberger, actress and singer, wife of Valentin Adamberger (b. 1752)
 * November 19 – Pietro Guglielmi, composer (b. 1728)
 * date unknown
 * Gioacchino Cocchi, opera composer (b.c.1720)
 * Marie Louise Marcadet, actress and singer (b. 1758)
 * Lorenzo Quaglio, stage designer (b. 1730)
 * Giovanni Valentini, composer, poet and painter (b. c. 1730)
 * Christian Felix Weisse, lyricist and writer (born 1726)
 * Abraham Wood, early American composer (b. 1752)