Friday, March 31, 2017

很容易陷入的 bit rot 情況

「...a deterioration of software performance over time or its diminishing responsiveness because of the changing environment in which it resides.」

人的感官,並不善於察覺微小,逐漸的變化。所以系統的聲音,經過一段時間的緩慢轉變,於絕大多數的情況,主人自己往往沒有感覺。我自己見過好幾個例子,唱針都已經磨到左右邊不對稱,或者唱頭的高頻響應嚴重衰減,都還在繼續使用。直到我用顯微鏡或儀器看了,告訴他們有問題,才有所覺悟。這其中,還包括有音響界的大佬級人物。

前一陣子也遇到,真空管唱放的管子已經用很久了,聽起來就只是比較瘦的聲音。結果測出來THD高達17%左右。換到晶體機,THD降到才1點多,這時才聽得到系統應該有的聲音。


像這些情況,再厲害的金耳朵,能否聽出問題所在?

所以,定期的「健檢」是很重要的。就像是人體的健康,在幾年的期間,自己很難感覺逐漸的變異。很多情況,等發現有問題,都已是很嚴重的地步。

Bit rot

From Wikipedia, the free encyclopedia
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Bit rot may refer to:
  • "Bit Rot", a story written by Charles Stross
  • Data rot, the electric charge of a bit in RAM disperses, possibly altering program code or stored data; or the phenomenon of storage media gradually decaying over time
  • Software rot, a deterioration of software performance over time or its diminishing responsiveness because of the changing environment in which it resides

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