Information:  - A brass instrument is a musical instrument that produces sound by sympathetic vibration of air in a tubular resonator in sympathy with the vibration of the player's lips. Brass instruments are also called "labrosones", literally meaning "lip-vibrated instruments".  - In physics, a standing wave  also known as a stationary wave  is a wave in a medium in which each point on the axis of the wave has an associated constant amplitude. The locations at which the amplitude is minimum are called nodes, and the locations where the amplitude is maximum are called antinodes.  - A trumpet is a musical instrument commonly used in classical and jazz ensembles. The trumpet group contains the instruments with the highest register in the brass family. Trumpet-like instruments have historically been used as signaling devices in battle or hunting, with examples dating back to at least 1500 BC; they began to be used as musical instruments only in the late-14th or early 15th century. Trumpets are used in art music styles, for instance in orchestras, concert bands, and jazz ensembles, as well as in popular music. They are played by blowing air through almost-closed lips (called the player's embouchure), producing a "buzzing" sound that starts a standing wave vibration in the air column inside the instrument. Since the late 15th century they have primarily been constructed of brass tubing, usually bent twice into a rounded rectangular shape.   - Jazz is a music genre that originated amongst African Americans in New Orleans, United States, in the late 19th and early 20th centuries. Since the 1920s jazz age, jazz has become recognized as a major form of musical expression. It emerged in the form of independent traditional and popular musical styles, all linked by the common bonds of African American and European American musical parentage with a performance orientation. Jazz is characterized by swing and blue notes, call and response vocals, polyrhythms and improvisation. Jazz has roots in West African cultural and musical expression, and in African-American music traditions including blues and ragtime, as well as European military band music. Although the foundation of jazz is deeply rooted within the Black experience of the United States, different cultures have contributed their own experience and styles to the art form as well. Intellectuals around the world have hailed jazz as "one of America's original art forms".  - Jeff Oster is an American brass instrument player who has recorded flugelhorn or trumpet with artists such as William Ackerman , founder of Windham Hill Records . He got his start in the Coral Gables ( Florida ) Senior High School Band of Distinction playing under William `` Uncle Willie '' Ledue .  - William Ackerman (born 1949) is an American guitarist who founded Windham Hill Records.  - A resonator is a device or system that exhibits resonance or resonant behavior, that is, it naturally oscillates at some frequencies, called its resonant frequencies, with greater amplitude than at others. The oscillations in a resonator can be either electromagnetic or mechanical (including acoustic). Resonators are used to either generate waves of specific frequencies or to select specific frequencies from a signal. Musical instruments use acoustic resonators that produce sound waves of specific tones. Another example is quartz crystals used in electronic devices such as radio transmitters and quartz watches to produce oscillations of very precise frequency.  - The embouchure is the use of facial muscles and the shaping of the lips to the mouthpiece of woodwind instruments or the mouthpiece of the brass instruments. The word is of French origin and is related to the root "bouche" (fr.), 'mouth'. The proper embouchure allows the instrumentalist to play the instrument at its full range with a full, clear tone and without strain or damage to one's muscles.  - Antoine-Joseph "Adolphe" Sax (6 November 1814  c. 7 February 1894) was a Belgian inventor and musician who invented the saxophone in 1846. He played the flute and clarinet, and his other inventions are the saxotromba, saxhorn and saxtuba.  - A concert band, also called wind ensemble, symphonic band, wind symphony, wind orchestra, wind band, symphonic winds, symphony band, or symphonic wind ensemble, is a performing ensemble consisting of members of the woodwind, brass, and percussion families of instruments, along with the double bass.  - The saxophone (also referred to as the sax) is a family of woodwind instruments. Saxophones are usually made of brass and played with a single-reed mouthpiece similar to that of the clarinet. The saxophone family was invented by the Belgian instrument maker Adolphe Sax in 1840. Adolphe Sax wanted to create a group or series of instruments that would be the most powerful and vocal of the woodwinds, and the most adaptive of the brass instruments, that would fill the vacant middle ground between the two sections. He patented the saxophone on June 28, 1846, in two groups of seven instruments each. Each series consisted of instruments of various sizes in alternating transposition. The series pitched in B and E, designed for military bands, have proved extremely popular and most saxophones encountered today are from this series. Instruments from the so-called "orchestral" series, pitched in C and F, never gained a foothold, and the B and E instruments have now replaced the C and F instruments when the saxophone is used in an orchestra.  - The flugelhorn (also spelled fluegelhorn, flugel horn, or Flügelhornfrom German, "wing horn," ) is a brass instrument pitched in B, and resembles a trumpet, but has a wider, conical bore. The instrument known today as the flugelhorn was developed from the valved bugle and is a member of the saxhorn family, which was developed by Adolphe Sax, who also created the saxophone family. The modern flugelhorn and Sax's B soprano (contralto) saxhorn are practically the same instrument.    Given the information above, choose from the list below the object entity that exhibits the relation 'occupation' with the subject 'jeff oster'.  Choices: - band  - guitarist  - hunting  - instrumentalist  - inventor  - major  - member  - military  - musician  - physics  - radio
The answer to this question is:
musician