quadruple note
复数形式
quadruple notes
1
四倍音符, 十六分音符
a note duration equivalent to 16 whole notes in Western music
A quadruple note, also known as a longa, is a musical symbol that represents a duration of four beats in common time. It is depicted as a hollow circle with two vertical lines on either side. The quadruple note is used less frequently in modern music but was more common in earlier musical notation systems. It is used to indicate a note that should be held for a longer period compared to a whole note, making it useful for compositions that require extended note durations.