何謂Clipping

本文由 ANGUS2004-03-18 發表於 "錄音、音樂製作精華" 討論區


  1. ANGUS

    ANGUS New Member

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    2002-07-31
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    如題, 我查過精華區都只是文章中用到此詞而已還是不了何意?...有像"Headroom"由掌門人答的如此詳盡明確的釋疑嗎? TKS!!
     
  2. weiss

    weiss New Member

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    2002-09-02
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    簡言之, 就是"破表", 音量達到系統所能承受的最大極限之意
     
  3. ANGUS

    ANGUS New Member

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    字面上意思是'修剪'ㄝ有修改音量或音色的意思嗎?
     
  4. Mr72

    Mr72 Well-Known Member

    註冊日期:
    2001-09-07
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    </font><blockquote>引言:</font><hr /> 字面上意思是'修剪'ㄝ有修改音量或音色的意思嗎? </font>[/QUOTE]Clip 字面上意思是修剪"Waveform"波型,(通常修剪峰值Peak..),,,,而非音量..修剪波型和控制音量是有差異的......
    一般來說meter reading clipping,,,就如weiss說的簡言之"破表"....

    我猜Angus 會有clip是否有修改音量或音色的想法..是來自於如Appogee A/D或某些mastering suite software 有所謂的"Soft clipping"or"Hard Clipping"的option,,這類clip options 作動時會有類似Limiter的抑制peak overload 功能運算.....
    我把clipping 的模式,稍加解說........

    Symmetrical clipping
    For a given input waveform,..The tops and bottoms of the waveform are clipped equally,...Symmetrically.
    For a simple sine wave, symmetrical clipping generates only odd-order harmonics, giving a reedy, or raspy sound to the resultant waveform.......

    However,the "hardness" or "softness" of the clipping does matters to sound...

    Hard clipping results when the output wave equals the input up/down to a certain level...Then stays at the clipping level until the input drops below the clipping level again.. Giving perfectly "flat tops" and "bottoms" to the clipped output...

    Soft clipping has no abrupt clipping level, but gently "rounds" the top/bottom of the output wave so the waveform is "softly" rounded on top/bottom,....Some solid state devices actually flat top, then invert, producing a hollow topped output waveform at hard clipping.....
    There is a continuum of clipping hardness, depending on the circuitry used to clip. Soft clipping emphasizes the lower- order harmonics, the third and fifth, etc......Hard clipping has a mix slewed to the higher order seventh and up harmonics, which are harsher sounding......

    此外clipping 還有Asymmetrical clipping,Infinite limiting,Half wave rectification,Full wave rectification,其他的運算模式,,,,或甚至如常見的GT synthesizers 則是Arbitrary waveform generation 的一種......

    但這些和音樂都無關,,,多數的音樂工作者一輩子也不會瞭,,,
    所以看完就算了,,,也別太深入瞭解了......
     
  5. ANGUS

    ANGUS New Member

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    Very thanks Mr. 72!!
     

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