They usually are pianists, but there ir no obligation, you can study conducting even if you are not a technically great performer, bur you need to hace very clear the ideas of performance and very high knowledge of the instrument of the orchestra
No "one" instrument leads the orchestra ... the conductor leads the orchestra. There are occasions where a solo instrument is featured as the leading instrument, but it's still the conductor who sets the tempo and phrasing.
The leader of the orchestra plays the violin. The leader of the orchestra is called the Concert Master and is also the first chair violin player.
Violin. The leader is the principal first violinist.
The conductor may play any instrument, but seldom actually plays during a concert they are conducting. The Concert Master is typically the First Chair Violinist of the orchestra.
The oboe is the instrument that is usually played by the musician who plays the Cor Anglais in an orchestra.
Andre Rieu
Duke Ellington was a Big Band orchestra leader and composer. His instrument was the piano.
The violin is the smallest stringed instrument in an orchestra.
The place where an orchestra plays - is called the orchestra pit
The leader of the orchestra - its a violin from the front desk.
The oboe is the instrument that is usually played by the musician who plays the Cor Anglais in an orchestra.
Andre Rieu
Because Within the orchestra the piano usually supports the harmony, but it has another role as a solo instrument (an instrument that plays by itself), playing both melody and harmony.
The first chair of the first violin section is called the concertmaster or concertmistress. They are considered to be the leader of the orchestra. The conductor can play any instrument.
Duke Ellington was a Big Band orchestra leader and composer. His instrument was the piano.
The instrument in an orchestra that has the highest pitch is the violin.
The violin is the smallest stringed instrument in an orchestra.
The piccolo plays one octave higher than the flute.
The place where an orchestra plays - is called the orchestra pit
I assume you mean Teun. Teun plays the flute and in some songs like the Rose he plays a penny whistle.
The clarinet.