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The members of the brass family are wound lengths of metal tubing with a cup-shaped mouthpiece at one end and a flared bell at the other. Pitch is controlled in part by the pressure of the lips and amount of air, and also by altering the length of tubing either by valves (trumpet, French horn, tuba) or by a sliding section of tube (trombone).

The percussion family encompasses a large and diverse group of instruments, which in the Western system of classification are divided into pitched and nonpitched. The nucleus of the orchestral percussion section consists of two, three, or four timpani, or kettledrums. Timpani are tuned to specific pitches by varying the tension on the head that is stretched over the brass bowl. The snare drum, bass drum, triangle, cymbals, marimba (or xylophone), tambourine, castanets, and chimes are among the other instruments found in the percussion section of an orchestra when called for in particular musical works. Percussionists usually specialize in a particular instrument but are expected to be competent players of them all.

The piano, harpsichord, and organ constitute a separate category of instruments. The harpsichord might be classified as a plucked string, the piano as both a string and a percussion instrument since its strings are struck by felt-covered hammers, and the organ as a wind instrument, its pipes being a collection of air-filled tubes. Because the mechanism of the keyboard allows the player to produce several tones at once, keyboard instruments have traditionally been treated as self-sufficient rather than as members of an orchestral section.

Counterparts to the Western orchestral instruments are found in musical cultures all over the world. Among the strings are the Indian sitar, the Japanese koto, the Russian balalaika, and the Spanish guitar. Oboe-type instruments are found throughout the Middle East and bamboo flutes occur across Asia and Latin America. Brass-like instruments include the long straight trumpets used by Tibetan monks and instruments made from animal horns and tusks, such as the Jewish shofar. Percussion instruments are probably the most numerous and diverse, from simple folk instruments like gourd rattles filled with pebbles, notched sticks rubbed together, and hollow log drums, to the huge tempered metal gongs of China, the bronze xylophones of Indonesia, and the tuned steel drums of the Caribbean.

Ensembles

The word “ensemble” comes from the French meaning “together” and is a broad concept that encompasses groupings of various constituencies and sizes. Ensembles can be made up of singers alone, instruments alone, singers and instruments together, two performers or hundreds. Ensemble performance is part of virtually every musical tradition. Examples of large ensembles are the symphony orchestra, marching band, jazz band, West Indian steel pan orchestra, Indonesia gamelan, African drum ensembles, chorus, and gospel choir. In such large groups, performers are usually divided into sections, each with its particular material or function. So, for example, all the tenors in a chorus sing the same music, and all the alto saxes in a jazz big band play the same part. Usually a conductor or lead performer is responsible for keeping everyone together.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Music appreciation: its language, history and culture. OpenStax CNX. Jun 03, 2015 Download for free at https://legacy.cnx.org/content/col11803/1.1
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