What instruments make up a traditional orchestra ~ how is it organized?

String section: first and second violins (at the conductor's left hand); violas, cellos, and double basses (at the conductor's right hand)

Woodwinds (seating rows from left to right): piccolo, flute, clarinet, oboe, and tuba

Brass section (seating rows from left to right): horn, trumpet, trombone, and tuba

Percussion (at the end of the band, standing at the conductor's (at the end of the orchestra in the conductor's left hand, standing): timpani, snare drums, drums, xylophone, hairpin, gongs, and other miscellaneous percussion instruments

Harp (usually seated behind the second violin)

Piano accompaniment, if necessary (usually seated at the back next to the percussion)

An orchestral conductor's left hand is usually for the high voices, and his right hand is for the low voices

Only one conductor's left hand is for high voices, and the right hand is for the low voices. lower register