<P> The typical symphony orchestra consists of four groups of related musical instruments called the woodwinds , brass , percussion , and strings ( violin , viola , cello and double bass ) . Other instruments such as the piano and celesta may sometimes be grouped into a fifth section such as a keyboard section or may stand alone , as may the concert harp and electric and electronic instruments . The orchestra , depending on the size , contains almost all of the standard instruments in each group . </P>
<P> The typical symphony orchestra consists of four groups of related musical instruments called the woodwinds , brass , percussion , and strings ( violin , viola , cello and double bass ) . Other instruments such as the piano and celesta may sometimes be grouped into a fifth section such as a keyboard section or may stand alone , as may the concert harp and electric and electronic instruments . The orchestra , depending on the size , contains almost all of the standard instruments in each group . </P>
the orchestra has how many primary instrument groups
the orchestra has how many primary instrument groups
four
four