In music theory

Music theory

Music theory is the study of how music works. It examines the language and notation of music. It seeks to identify patterns and structures in composers' techniques across or within genres, styles, or historical periods...

, the major scale or Ionian

Ionian mode

Ionian mode is the name assigned by Heinrich Glarean in 1547 to his new authentic mode on C , which uses the diatonic octave species from C to the C an octave higher, divided at G into a fourth species of perfect fifth plus a third species of perfect fourth : C D...

 scale is one of the diatonic

Diatonic scale

In music theory, a diatonic scale is a seven note, octave-repeating musical scale comprising five whole steps and two half steps for each octave, in which the two half steps are separated from each other by either two or three whole steps...

 scale

Musical scale

In music, a scale is a sequence of musical notes in ascending and descending order. Most commonly, especially in the context of the common practice period, the notes of a scale will belong to a single key, thus providing material for or being used to conveniently represent part or all of a musical...

s. It is made up of seven distinct note

Note

In music, the term note has two primary meanings:#A sign used in musical notation to represent the relative duration and pitch of a sound;#A pitched sound itself....

s, plus an eighth which duplicates the first an octave

Octave

In music, an octave is the interval between one musical pitch and another with half or double its frequency. The octave relationship is a natural phenomenon that has been referred to as the "basic miracle of music", the use of which is "common in most musical systems"...

 higher. In solfege

Solfege

In music, solfège is a pedagogical solmization technique for the teaching of sight-singing in which each note of the score is sung to a special syllable, called a solfège syllable...

 these notes correspond to the syllables "Do, Re, Mi, Fa, Sol, La, Ti/Si, (Do)", the "Do" in the parenthesis at the end being the octave of the tonic starting pitch. The simplest major scale to write or play on the 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...

 is 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....

, the only major scale not to require sharp

Sharp (music)

In music, sharp, dièse , or diesis means higher in pitch and the sharp symbol raises a note by a half tone. Intonation may be flat, sharp, or both, successively or simultaneously...

s or flats, using only the white keys on the piano keyboard

Musical keyboard

A musical keyboard is the set of adjacent depressible levers or keys on a musical instrument, particularly the piano. Keyboards typically contain keys for playing the twelve notes of the Western musical scale, with a combination of larger, longer keys and smaller, shorter keys that repeats at the...

:
In rock and popular music examples of songs in Ionian include REO Speedwagon

REO Speedwagon

REO Speedwagon is an American rock band. Formed in 1967, the band grew in popularity during the 1970s and peaked in the early 1980s. Hi Infidelity is the group's most commercially successful album, selling over ten million copies and charting four Top 40 hits in the US...

's "Take It on the Run

Take It On the Run

"Take It on the Run" is the fifth track on the REO Speedwagon album Hi Infidelity. It was released as a single in 1981 and reached #5 on the Billboard charts. The song was written by guitarist Gary Richrath. "Take It on the Run" was the follow-up single behind the group’s #1 hit, “Keep on Loving You”...

", The Shirelles

The Shirelles

The Shirelles were an African-American girl group that achieved popularity in the early 1960s. They consisted of schoolmates Shirley Owens , Doris Coley , Addie "Micki" Harris , and Beverly Lee...

' "Will You Love Me Tomorrow

Will You Love Me Tomorrow

"Will You Love Me Tomorrow", also known as "Will You Still Love Me Tomorrow", is a song written by Gerry Goffin and Carole King and originally recorded by The Shirelles. It has been recorded by many artists and was ranked among Rolling Stone 's list of The 500 Greatest Songs of All Time at #125...

", Gordon Lightfoot

Gordon Lightfoot

Gordon Meredith Lightfoot, Jr. is a Canadian singer-songwriter who achieved international success in folk, folk-rock, and country music, and has been credited for helping define the folk-pop sound of the 1960s and 1970s...

's "Carefree Highway

Carefree Highway (song)

"Carefree Highway" is a song written by Gordon Lightfoot and was second single release from his 1974 album, Sundown. The song peaked at number ten on the Billboard Hot 100 and spent one week at number one on the Easy Listening chart in October 1974....

", and Gin Blossoms

Gin Blossoms

Gin Blossoms is an American pop rock band formed in 1987, in Tempe, Arizona. They took their name from a photo of W.C. Fields which bore the caption "W.C. Fields with gin blossoms", referring to what appeared to be the actor's gin-ravaged nose, but was actually a skin condition known as rosacea...

' "Follow You Down

Follow You Down

"Follow You Down" is the third song from the album Congratulations... I'm Sorry by Gin Blossoms, and was released as a double-A side single along with "Til I Hear It from You". According to an interview by Songfacts with Gin Blossoms songwriter Jesse Valenzuela, this song was written at the very...

".
A major scale may be seen as two identical tetrachord

Tetrachord

Traditionally, a tetrachord is a series of three intervals filling in the interval of a perfect fourth, a 4:3 frequency proportion. In modern usage a tetrachord is any four-note segment of a scale or tone row. The term tetrachord derives from ancient Greek music theory...

s separated by a whole tone

Major second

In Western music theory, a major second is a musical interval spanning two semitones, and encompassing two adjacent staff positions . For example, the interval from C to D is a major second, as the note D lies two semitones above C, and the two notes are notated on adjacent staff postions...

, or whole step, the new set of steps "Whole:Whole:Half:Whole:Whole:Whole:Half"(in Semi-tone 2 2 1 2 2 2 1).