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Bassline

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Bassline

Bassline (also known as a bass line or bass part) is the term used in many styles of music, such as blues, jazz, funk, dub and electronic, traditional, and classical music, for the low-pitched instrumental part or line played (in jazz and some forms of popular music) by a rhythm section instrument such as the electric bass, double bass, cello, tuba or keyboard (piano, Hammond organ, electric organ, or synthesizer).

In unaccompanied solo performance, basslines may simply be played in the lower register of any instrument while melody and/or further accompaniment is provided in the middle or upper register. In solo music for piano and pipe organ, these instruments have an excellent lower register that can be used to play a deep bassline. On organs, the bass line is typically played using the pedal keyboard and massive 16' and 32' bass pipes.

Basslines in popular music often use "riffs" or "grooves", which are usually simple, appealing musical motifs or phrases that are repeated, with variation, throughout the song. "The bass differs from other voices because of the particular role it plays in supporting and defining harmonic motion. It does so at levels ranging from immediate, chord-by-chord events to the larger harmonic organization of a [sic] entire work."

Bassline riffs usually (but not always) emphasize the chord tones of each chord (usually the root note, the third note, or the fifth note), which helps to define a song's key. Basslines align or syncopate with the drums. Other rhythm instruments join in to create a more interesting rhythmic variations. The type of rhythmic pulse used in basslines varies widely in different types of music. In swing jazz and jump blues, basslines are often created from a continuous sequence of quarter notes in a mostly scalar, stepwise or arpeggio-based part called a "walking bass line". In Latin, salsa music, jazz fusion, reggae, electronica, and some types of rock and metal, basslines may be very rhythmically complex and syncopated. In bluegrass and traditional country music, basslines often emphasize the root and fifth of each chord.

Though basslines may be played by many different types of instruments and in a broad musical range, they are generally played on bass instruments and in the range roughly at least an octave and a half below middle C (roughly the range of the bass clef). In classical music such as string quartets and symphonies, basslines play the same harmonic and rhythmic role; however, they are usually referred to as the "bass voice" or the "bass part".

Most popular musical ensembles include an instrument capable of playing bass notes. In the 1890s, a tuba was often used. From the 1920s to the 1940s, most popular music groups used the double bass as the bass instrument. Starting in the 1950s, the bass guitar began to replace the double bass in most types of popular music, such as rock and roll, blues, and folk. The bass guitar was easier to transport and, given that it uses magnetic pickups, easier to amplify to loud stage volumes without the risk of audio feedback, a common problem with the amplified double bass. By the 1970s and 1980s, the electric bass was used in most rock bands and jazz fusion groups. The double bass was still used in some types of popular music that recreated styles from the 1940s and 1950s such as jazz (especially swing and bebop), traditional 1950s blues, jump blues, country, and rockabilly.

In some popular music bands, keyboard instruments are used to play the bass line. In organ trios, for example, a Hammond organ player performs the basslines using the organ's pedal keyboard. In some types of popular music, such as hip-hop or house music, the bass lines are played using bass synthesizers, sequencers, or electro-acoustically modeled samples of basslines.

Basslines are important in many forms of dance and electronic music, such as electro, drum and bass, dubstep, and most forms of house and trance. In these genres, basslines are almost always performed on synthesizers, either physical, such as the Minimoog and the Roland TB-303, or virtual, such as Sytrus and ZynAddSubFX. In hip-hop, producer Rick Rubin popularized the technique of creating basslines by lengthening the bass drum decay of the TR-808 drum machine and tuning it to different pitches.

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