What are the musical intruments you heard?
the four principle woodwind instruments of the orchestra all work by means of a system of keys (usually silver-plated) which when variously depressed and released and released allow air to pass through differing length of the instrument resulting in notes of different pitch. in order of descending overall pitch, these are
a normally silver -plated (or in more extravagant cases. gold). marrow- bored instrument. held horizontally just under the mouth. and activated by blowing air across an aperture at one end of the instrument. its higher – pitched cousin. the piccolo. is often encountered, although the lower alto flute rather less so. Early forebears include the unkeyed fife . the most popular close relation is the recorder family. largely unkeyed and end -blown in the vertical position