Filtering out sinusoidal components of the signal that occur at frequencies that cannot be produced by the music itself results in recording the music with little wind and rain noise.

滤除非音乐自己产生的那些频率的信号的正弦部分能够使记录的音乐中几乎没有风和雨的噪声。

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Out on the square itself, philosophy student Oscar Carrera from southern Spain stood frowning in the rain as the bell stood silent.

BBC: Pope conclave: Ponchos and prayers on St Peter's Square