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Comment on Audio cable measurements are driving me crazy — why don’t they null?!?

Your graph has a signal of -40dB. Are you working in high-energy physics? If it’s only nano-tech or something of this magnitude, you don’t have equipment that is this precise.

And all the “high-intensity” findings on your posting (at audible 0dB) are probably because the expensive cable didn’t connect well to the socket. And are still nothing, and have no impact on your sound quality.

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Uebercomplicated@lemmy.ml ⁨22⁩ ⁨hours⁩ ago
I’m not sure if you’re reading the graph correctly, this is the delta between two of the digital files from the video’s description. So a signal of -40 dBFS is quite audible, since it’s all relative to 0 dBFS (full scale).

And it isn’t the recording itself, it’s just the difference between two of the recordings provided in the video’s description. This is commonly known as a digital null-test, and let’s you find the amount (and significance) of difference between two digitally encoded recordings, and in particular at which frequencies those differences lie.

You can try doing it yourself by downloading the audio from the YouTube video’s description and then playing two of them at the same time in audacity, but with the phase inverterted for one of them. Just make sure the phase and volume are aligned. Then you can hear the difference between the recordings yourself!

The question is, where does this difference come from.

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- marcos@lemmy.world ⁨22⁩ ⁨hours⁩ ago
  
  So a signal of -40 dBFS is quite audible, since it’s all relative to 0 dBFS (full scale).
  
  At -40, it doesn’t make any difference what kind of dB you are talking about.
  
  (Well, if you are looking for superstrings evidence or even quantum gravity, it does, but I guess it’s not your case.)
  
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  - bigpEE@lemmy.world ⁨6⁩ ⁨hours⁩ ago
    It sounds like you think -40dB is such a small factor it must be inaudible. It absolutely is, the ear has like 100dB of dynamic range
    
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  - Uebercomplicated@lemmy.ml ⁨22⁩ ⁨hours⁩ ago
    en.wikipedia.org/wiki/DBFS
    
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    marcos@lemmy.world ⁨21⁩ ⁨hours⁩ ago
    Relevant line:
    
    US installations use +24 dBu for 0 dBFS
    
    That means the US definition you can’t hear anything below -24 dBFS. It’s the largest value there, it’s -18 for the EU.
    
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