B minor is a minor scale based on B, consisting of the pitches B, C♯, D, E, F♯, G, and A. Its key signature has two sharps. Its relative major is D major and its parallel major is B major. The B natural minor scale is: Changes needed for the melodic and harmonic versions of the scale are written in with accidentals as necessary. The B harmonic minor and melodic minor scales are: Christian Friedrich Daniel Schubart (1739–1791) regarded B minor as a key expressing a quiet acceptance of fate and very gentle complaint, something commentators find to be in line with Bach's use of the key in his St John Passion. By the end of the Baroque era, however, conventional academic views of B minor had shifted: Composer-theorist Francesco Galeazzi (1758–1819) opined that B minor was not suitable for music in good taste. Beethoven labelled a B-minor melodic idea in one of his sketchbooks as a "black key".

In classical music, a piano quintet is a work of chamber music written for piano and four other instruments, most commonly (since 1842) a string quartet (i.e., two violins, viola, and cello). The term also refers to the group of musicians that plays a piano quintet. The genre flourished during the nineteenth century. Until the middle of the nineteenth century, most piano quintets were scored for piano, violin, viola, cello, and double bass. Following the success of Robert Schumann's Piano Quintet in E♭ major, Op. 44 in 1842, which paired the piano with a string quartet, composers increasingly adopted Schumann's instrumentation, and it was this form of the piano quintet that dominated during the second half of the nineteenth century and into the twentieth century. Among the best known and most frequently performed piano quintets, aside from Schumann's, are Schubert's Trout quintet and the piano quintets of Johannes Brahms, César Franck, Antonín Dvořák and Dmitri Shostakovich.

Among the fairly large repertoire for the standard piano trio (violin, cello, and piano) are the following works: Ordering is by surname of composer.

The String Quartet No. 2 is a string quartet in D major written by Alexander Borodin in 1881. It was dedicated to his wife Ekaterina Protopova. Some scholars, such as Borodin's biographer Serge Dianin, suggest that the quartet was a 20th anniversary gift and that it has a program evoking the couple's first meeting in Heidelberg. Of its four movements, the third movement "Notturno" is the most famous.

The Emerson String Quartet, also known as the Emerson Quartet, was an American string quartet initially formed as a student group at the Juilliard School in 1976. It was named for American poet and philosopher Ralph Waldo Emerson and began touring professionally in 1976. The ensemble taught in residence at The Hartt School in the 1980s and is currently the quartet in residence at Stony Brook University. Both of the founding violinists studied with Oscar Shumsky at Juilliard, and the two alternated as first and second violinists for the group. The Emerson Quartet was one of the first such ensembles with the two violinists alternating chairs. The Emerson Quartet was inducted into the Classical Music Hall of Fame in 2010. As of May 2014, they had released more than thirty albums and won nine Grammy Awards, as well as the prestigious Avery Fisher Prize in 2004. In 2017, the Emerson String Quartet Institute became part of the College of Arts and Sciences at Stony Brook University. The institute enables members of the current quartet and the quartet's former cellist David Finckel to mentor and coach student string quartets. In August 2021, the quartet announced its plan to disband at the end of the 2022–2023 season in order to focus on teaching and solo work. In the final season of concerts in 2022-23, the quartet gave farewell performances throughout North America and Europe. The final performance of the quartet took place on Sunday, October 22, 2023, in New York City, featuring a program of Beethoven's Op. 130 string quartet (with its original ending, the Grosse Fuge, Op. 133) and Schubert's String Quintet D. 956. The performance was filmed by Tristan Cook for a planned documentary.

The String Quartet No. 2 is a string quartet in D major written by Alexander Borodin in 1881. It was dedicated to his wife Ekaterina Protopova. Some scholars, such as Borodin's biographer Serge Dianin, suggest that the quartet was a 20th anniversary gift and that it has a program evoking the couple's first meeting in Heidelberg. Of its four movements, the third movement "Notturno" is the most famous.

F minor is a minor scale based on F, consisting of the pitches F, G, A♭, B♭, C, D♭, and E♭. Its key signature consists of four flats. Its relative major is A-flat major and its parallel major is F major. The F natural minor scale is Changes needed for the melodic and harmonic versions of the scale are written in with accidentals as necessary. The F harmonic minor and melodic minor scales are