In music theory, a natural is an accidental which cancels previous accidentals and represents the unaltered pitch of a note.^[1]

A note is natural when it is neither flat (♭) nor sharp (♯) (nor double-flat  nor double-sharp ). Natural notes are the notes A, B, C, D, E, F, and G represented by the white keys on the keyboardof a piano or organ. On a modern concert harp, the middle position of the seven pedals that alter the tuning of the strings gives the natural pitch for each string.

The scale of C major is sometimes regarded as the central, natural or basic major scale because all of its notes are natural notes, whereas every other major scale has at least one sharp or flat in it.

The notes F♭, C♭, E♯, B♯, and most notes inflected by double-flats and double-sharps correspond in pitch with natural notes; however, they are not regarded as natural notes but rather as enharmonic equivalents of them and are just as much chromatically inflected notes as most sharped and flatted notes that are represented by black notes on a keyboard.

https://en.m.wikipedia.org/wiki/Natural_(music)

https://en.m.wikipedia.org/wiki/Bejun_Mehta

Christoph Willibald (Ritter von) Gluck (German: [ˈkʁɪstɔf ˈvɪlɪbalt ˈɡlʊk]; 2 July 1714 – 15 November 1787) was a composer of Italian and French opera in the early classical period. Born in the Upper Palatinate (now part of Germany) and raised in Bohemia,[1] he gained prominence at the Habsburg court at Vienna, where he brought about the practical reform of opera’s dramaturgical practices that many intellectuals had been campaigning for over the years. With a series of radical new works in the 1760s, among them Orfeo ed Euridice and Alceste, he broke the stranglehold that Metastasian opera seria had enjoyed for much of the century.

Source: Christoph Willibald Gluck – Wikipedia

In classical music from Western culture, a third is a musical interval encompassing three staff positions (see Interval number for more details), and the major third ( Play ) is a third spanning four semitones. Along with the minor third, the major third is one of two commonly occurring thirds. It is qualified as major because it is the larger of the two: the major third spans four semitones, the minor third three. For example, the interval from C to E is a major third, as the note E lies four semitones above C, and there are three staff positions from C to E. Diminished andaugmented thirds span the same number of staff positions, but consist of a different number of semitones (two and five).
https://en.m.wikipedia.org/wiki/Major_third

In the music theory of Western culture, a minor third is a musical interval that encompasses three half steps, or semitones. Staff notation represents the minor third as encompassing threestaff positions (see: interval number). The minor third is one of two commonly occurring thirds. It is called minor because it is the smaller of the two: the major third spans an additional semitone. For example, the interval from A to C is a minor third, as the note C lies three semitones above A, and (coincidentally) there are three staff positions from A to C. Diminished and augmented thirdsspan the same number of staff positions, but consist of a different number of semitones (two and five). The minor third is a skip melodically.
https://en.m.wikipedia.org/wiki/Minor_third

In Western music, the adjectives major and minor can describe a musical composition,movement, section, scale, key, chord, or interval.

Major and minor are frequently referred to in the titles of classical compositions, especially in reference to the key of a piece.

Contents

Intervals and chordsEdit

Major and minor third in a major chord: major third ‘M’ on bottom, minor third ‘m’ on top.  Play 

Relative tonic chords on C and A.  Play 

Parallel tonic chords on C

Major chord

Minor chord

The difference between the major and minor chord may be seen if they are drawn in chromatic circle.

With regard to intervals, the words major and minor just mean large and small, so a major third is a wider interval, and a minor third a relatively narrow one. The intervals of the second, third, sixth, and seventh (and compound intervals based on them) may be major or minor.

The other uses of major and minor, in general, refer to musical structures containing major thirds or minor thirds. A major scale is one whose third degree is a major third above thetonic, while a minor scale has a minor third degree. A major chord or major triad, similarly, contains a major third above theroot, whereas a minor chord or minor triad contains a minor third above the root. In Western music, a minor chord, in comparison, “sounds darker than a major 

https://en.m.wikipedia.org/wiki/Major_and_minor

The major scale or Ionian scale is one of the most commonly used musical scales, especially in Western music. It is one of the diatonic scales. Like many musical scales it is made up of seven notes: the eighth duplicates the first at double itsfrequency so that it is called a higher octave of the same note (from Latin “octavus”, the eighth).

The simplest major scale to write is C major, the only major scale to not require sharps or flats:

C-D-E-F-G-A-B-C ( C major scale )

The major scale had a central importance in European music, particularly in the common practice period and in popular music, owing to the large number of chords that can be formed from it.^{[citation needed]} In Carnatic music, it is known as Dheerasankarabharanam, and in Hindustani classical music it is known as Bilaval.

https://en.m.wikipedia.org/wiki/Diatonic_scale

F♯ major or F-sharp major is a major scale based on F♯, consisting of the pitches F♯, G♯,A♯, B, C♯, D♯, and E♯. Its key signature has six sharps.^[1]

F♯ major

Relative key	D♯ minor
Parallel key	F♯ minor
Dominant key	C♯ major
Subdominant	B major
Enharmonic	G♭ major
Component pitches
F♯, G♯, A♯, B, C♯, D♯, E♯, F♯

See also: F major and G-flat major

Its relative minor is D♯ minor (or enharmonically E♭ minor). Its parallel minor isF♯ minor. Its enharmonic equivalent is G♭major. In writing music for transposing instruments in B-flat or E-flat, it is preferable to use a G-flat rather than an F-sharp key signature. If F-sharp major must absolutely be used, one should take care that B-flat wind instruments be notated in A-flat major, rather than G-sharp major (or G instruments used instead, giving a transposed key of B major), and D-flat instruments in F major instead of E-sharp major, in order to avoid double sharps in key signatures.

https://en.m.wikipedia.org/wiki/F-sharp_major

Mirella Freni (Italian: [miˈrɛlːa ˈfreːni]; born Mirella Fregni on 27 February 1935) is an Italian opera soprano whose repertoire includes Verdi, Puccini, Mozart and Tchaikovsky.^[1] Freni was married for many years to the Bulgarian bass Nicolai Ghiaurov, with whom she performed and recorded.
https://en.m.wikipedia.org/wiki/Mirella_Freni

https://en.m.wikipedia.org/wiki/Mario_Lanza

Casa Ricordi is a publisher of primarily classical music and opera. Its classical repertoire represents one of the important sources in the world through its publishing of the work of the major 19th-century Italian composers such as Gioachino Rossini, Gaetano Donizetti, Vincenzo Bellini, Giuseppe Verdi, and, later in the century, Giacomo Puccini, composers with whom one or another of the Ricordi family came into close contact.
https://en.m.wikipedia.org/wiki/Casa_Ricordi