Ein Herz, ein Sinn! opus

Opus number

An Opus number , pl. opera and opuses, abbreviated, sing. Op. and pl. Opp. refers to a number generally assigned by composers to an individual composition or set of compositions on publication, to help identify their works...

 323 is a polka-mazurka

Polka-mazurka

The polka-mazurek is a dance, musically similar to the mazurek, but danced much like the polka. Many polka-mazurek's were composed by Johann Strauss II and his family. Johann Strauss I did not compose any of this type of music; the first polka-mazurek example written by the Strauss family was in...

 composed by Johann Strauss II

Johann Strauss II

Johann Strauss II , also known as Johann Baptist Strauss or Johann Strauss, Jr., the Younger, or the Son , was an Austrian composer of light music, particularly dance music and operettas. He composed over 500 waltzes, polkas, quadrilles, and other types of dance music, as well as several operettas...

 in 1868 belonging to a period of creativity of the composer

Composer

A composer is a person who creates music, either by musical notation or oral tradition, for interpretation and performance, or through direct manipulation of sonic material through electronic media...

. Strauss dedicated this piece to 'the Committee of the Citizen's Ball' which was held at the Imperial Redoutensaal on 11 February 1868 where on occasion he had earlier also dedicated his waltz

Waltz

The waltz is a ballroom and folk dance in time, performed primarily in closed position.- History :There are several references to a sliding or gliding dance,- a waltz, from the 16th century including the representations of the printer H.S. Beheim...

 Bürgersinn

Bürgersinn

Bürgersinn op. 295 is a waltz by Johann Strauss II composed in 1865 for the Citizen's Ball held during the Vienna Carnival Fasching of the year...

 (op. 295).

Its themes have been selected as material for the operetta

Operetta

Operetta is a genre of light opera, light in terms both of music and subject matter. It is also closely related, in English-language works, to forms of musical theatre.-Origins:...

 Wiener Blut

Wiener Blut

Wiener Blut may refer to:*Wiener Blut , a waltz by Johann Strauss II*Wiener Blut , an operetta by Johann Strauss II*Wiener Blut , an album by Falco*Wiener Blut , a song by Rammstein...

 (1899) of which Strauss himself did not compose any new music, instead relying on Adolf Müller Jr. to arrange from Strauss' previous compositions.

Strauss' tranquil polka-mazurka begins in C major

C major

C major is a musical major scale based on C, with pitches C, D, E, F, G, A, and B. Its key signature has no flats/sharps.Its relative minor is A minor, and its parallel minor is C minor....

 with a Trio section in F major

F major

F major is a musical major scale based on F, consisting of the pitches F, G, A, B, C, D, and E. Its key signature has one flat . It is by far the oldest key signature with an accidental, predating the others by hundreds of years...

. Throughout the piece, the mood is generally happy although these are never outright cheerful nor triumphant and the finale is a gentle affirmation of these. The polka-mazurka has often been transcribed for piano

Piano

The piano is a musical instrument played by means of a keyboard. It is one of the most popular instruments in the world. Widely used in classical and jazz music for solo performances, ensemble use, chamber music and accompaniment, the piano is also very popular as an aid to composing and rehearsal...

solos.