• Hugin@lemmy.world
    link
    fedilink
    arrow-up
    4
    ·
    5 months ago

    It’s Nyquist–Shannon. Norquist is taxes.

    Also frequencies greater than half the sampling rate aren’t lost they fold into lower frequencies unless filtered out.

    But if you think it’s easiser to capture those room acoustics with analog equipment the non linear amplification and distortion of any analog system is going to change the sound just add much if not more then a good digital system.

    So yeah both lose or distort the signal but digital does it in avery predictable way that can be accounted for and it does have a frequency region that it captures precisely. Analog doesn’t.

    • intensely_human@lemm.ee
      link
      fedilink
      arrow-up
      4
      ·
      5 months ago

      Nyquist, thank you.

      aren’t lost they fold into lower frequencies unless filtered out

      If by “fold into” you mean they add noise to and hence distort the readings on the lower frequencies, that’s correct. But that just takes it further from a perfect reproduction.

      • Hugin@lemmy.world
        link
        fedilink
        arrow-up
        1
        ·
        5 months ago

        Frequency folding is the term used in DSP no need for quotes. The Nyquist frequency is commonly referred to as the folding frequency.

        And yes frequencies above the Nyquist folding frequency alias into lower frequencies. A simple low pass filter prevents this however.

        Properly filtered digital sampling produced a more accurate reproduction of the frequency range with less distortion then an analog signal.