25. 다음 글에서 (가),(나)에 들어갈 단어중 알맞은 것으로 고르시오.
The names of pitches are associated with particular
frequency values. Our current system is called A440 because
the note we call ‘A’ that is in the middle of the piano keyboard
has been fixed to have a frequency of 440 Hz. This is entirely
arbitrary. We could fix ‘A’ at any frequency, such as 439 or
424; different standards were used in the time of Mozart than
today. Some people claim that the (가) precise/different
frequencies affect the overall sound of a musical piece and the sound of
instruments. Led Zeppelin, a band popular in the 70s, often
tuned their instruments away from the modern A440 standard
to give their music an uncommon sound, and perhaps to link it
with the European children’s folk songs that inspired many of
their compositions. Many purists insist on hearing baroque
music on period instruments, both because the instruments
have a (나) precise/different sound and because they are designed to play
the music in its original tuning standard, something that
purists deem important.
① precise/precise
② precise/different
③ different/precise
④ different/different
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