A minor in the context of "C Major"

C or Do is the first note of the C major scale, the third note of the A minor scale (the relative minor of C major), and the fourth note (G, A, B, C) of the Guidonian hand, commonly pitched around 261.63 Hz. The actual frequency has depended on historical pitch standards, and for transposing instruments a distinction is made between written and sounding or concert pitch. It has enharmonic equivalents of B♯ and D.

In English the term Do is used interchangeably with C only in the context of fixed Do solfège; in the movable Do system Do refers to the tonic of the prevailing key.

C major is a major scale based on C, consisting of the pitches C, D, E, F, G, A, and B. C major is one of the most common keys used in music. Its key signature has no flats or sharps. Its relative minor is A minor and its parallel minor is C minor.

Camille Saint-Saëns composed his Cello Concerto No. 1 in A minor, Op. 33, in 1872, when he was 37 years old. He wrote this work for the French cellist, viola da gamba player and instrument maker Auguste Tolbecque. Tolbecque was part of a distinguished family of musicians closely associated with the Société des Concerts du Conservatoire, France's leading concert society. The concerto was first performed on January 19, 1873, at the Paris Conservatoire concert with Tolbecque as soloist. This was considered a mark of Saint-Saëns' growing acceptance by the French musical establishment.

Sir Donald Francis Tovey later wrote "Here, for once, is a violoncello concerto in which the solo instrument displays every register without the slightest difficulty in penetrating the orchestra." Many composers, including Shostakovich and Rachmaninoff, considered this concerto to be the greatest of all cello concertos. Yo-Yo Ma's recording of five "Great Cello Concertos" includes Dvořák's, Elgar's, Haydn's 2nd, Saint-Saëns' first, and Schumann's.

Although early advocates such as Robert Kajanus, Sir Thomas Beecham, and Serge Koussevitzky had conducted many of Sibelius's symphonies for gramophone in the 1930s and 1940s, none of these Sibelians recorded all seven. Instead, the earliest complete traversal dates to 1953, four years before the composer's death on 20 September 1957; it is by Sixten Ehrling and the Stockholm Radio Orchestra, recorded from 1952 to 1953 for the Swedish label Metronome Records (released by Mercury Records in the United States). Ehrling had outpaced Anthony Collins and the London Symphony Orchestra, whose cycle—recorded from 1952 to 1955 on Decca Records—was concurrent with Ehrling's but arrived second. Since these two pioneering examples, the Sibelius cycle has, as of May 2025, been recorded an additional 49 times. The most recently completed (51st) cycle, finished in 2025, is by Jukka-Pekka Saraste and the Helsinki Philharmonic Orchestra; an additional two projected cycles are in progress, according to press releases.