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1. arpeggio is Italian for broken chord where the notes are played or sung in sequence, one after the other, rather than ringing out simultaneously. This word comes from the Italian word "arpeggiare" , which means "to play on a harp". These are formed from scales, the arpeggio is based on the relative scale playing the "key" notes or those affected by the key signature.
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2.Alberti bass is a particular kind of accompaniment in music, often used in the Classical era, and sometimes the Romantic era. It was named after Domenico Alberti (1710–1740), who used it extensively, although he was not the first to use it.
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Alberti bass is a kind of broken chord or arpeggiated accompaniment, where the notes of the chord are presented in the order lowest, highest, middle, highest. This pattern is then repeated. The broken chord pattern helps to create a smooth, sustained, flowing sound on the piano.
3.chord is any set of harmonically-related notes that is heard as if sounding simultaneously (a "harmonic simultaneity", see Simultaneity (music). The most frequently encountered chords in theory and music are triads: major and minor and then the augmented and diminished triads. The descriptions "major", "minor", "augmented" and "diminished" are referred to collectively as chordal "quality".
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4.melody is a linear succession of musical tones which is perceived as a single entity. In its most literal sense, a melody is a sequence of pitches and durations, while, more figuratively, the term has occasionally been extended to include successions of other musical elements such as tone color.
5.accompaniment is the art of playing along with an instrumental or vocal soloist or ensemble, often known as the lead, in a supporting manner. The accompaniment can be performed by a single performer--a pianist, organist, or guitarist--or it can be played by an entire ensemble, such as a symphony orchestra or string quartet (in the Classical genre) or a backing band or rhythm section (in popular music)
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