Recent content by Don Hills

  1. Don Hills

    Testing audiophile claims and myths

    True. You need to digitise them and use something like this: DeltaWave Audio Null Comparator It adjusts for phase and timing differences so you should be able to get useful results from comparing your two runs.
  2. Don Hills

    24bit vs 16bit, the myth exploded!

    They also had to use a DBX style compression / noise reduction system, because of the noise introduced by the head switching at the end of each scan. It wasn't a problem for video because the head switch was hidden in the flyback for each frame. Most decks had a tracking control knob, if you...
  3. Don Hills

    Testing audiophile claims and myths

    I recall the predominant theory it was to do with the different acoustic space dimensions. The smaller the room, the lower the actual SPL for the same perceived SPL. I'm still looking, the relevant archive is on an old machine which I will need to resurrect.
  4. Don Hills

    Music pros are not immune from bull

    Hands up anyone who has not been surprised at how different a recording of their own voice sounds.
  5. Don Hills

    Testing audiophile claims and myths

    I recall a conversation quite a few years ago, I think on a recording and mastering engineers' mailing list, that we tend to listen to in-room reproduction at a significantly lower SPL than the original live performance. That is, when played back at a level that you judge to be equal to the...
  6. Don Hills

    Testing audiophile claims and myths

    No, the amplifier has to be able to supply high voltage at high frequencies, not high power. The impedance of the coils rises with frequency, requiring more voltage to be able to drive enough current into the coils. A constant current drive high power amplifier is a tricky beast, it's much...
  7. Don Hills

    Testing audiophile claims and myths

    You imply that you have a "state of the art" LP reproduction system. Do you also have the means (an ADC) to record from this system? It doesn't have to be better than RBCD quality. What I'd really like is a minute or so of the 1 KHz track off a test record. It's for the "party trick" I used to...
  8. Don Hills

    Testing audiophile claims and myths

    As an aside, do you know why the amplifiers had to be capable of so much output?
  9. Don Hills

    What a long, strange trip it's been -- (Robert Hunter)

    Fixed it for you...
  10. Don Hills

    Testing audiophile claims and myths

    You appear to know as little about NIN as you know about audio science.
  11. Don Hills

    Schiit Happened: The Story of the World's Most Improbable Start-Up

    "Sounds like ass", of course. :ksc75smile:
  12. Don Hills

    Testing audiophile claims and myths

    Hopefully anyone interested in metal genres and high fidelity knows about http://www.metal-fi.com/
  13. Don Hills

    24 vs 32-bit sound

    May I suggest that you're an ideal person to write a brief explanation of gain staging and how people could achieve optimum staging in their systems?
  14. Don Hills

    Why do USB cables make such a difference?

    :face_palm: Without EMF, there would be no signal.Maybe you mean EMI?
  15. Don Hills

    Testing audiophile claims and myths

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