# Search results

1. ### Distortion down to -300 dB, what exactly does that mean physically?

Like I said to a troll who apparently got into it with a moderator before they were invited to depart, how do you even define flat? Is it the direct response? Is it the sum of direct plus room response? What window do you use to measure this? Do you measure near-field, far field, or what? And...
2. ### Distortion down to -300 dB, what exactly does that mean physically?

It all depends on what "appreciable" means, of course. When can one measure it, when do weird things like mass flow happen?
3. ### Distortion down to -300 dB, what exactly does that mean physically?

Yeah, I've asked that question, too. The body being mostly water, every 16CCs of a body will turn into 1.5*22.4 liters of gas, using the "all water" assumption. And then you are left with the problem of an exactly stoichometric mixture of H2 and O2 at a very high temperature in a very small...
4. ### Distortion down to -300 dB, what exactly does that mean physically?

Well, I suppose there would be "sound" for a bit while you are vaporized by the radiation. :D Doubt you'd hear it, or know.
5. ### Distortion down to -300 dB, what exactly does that mean physically?

So true, so basic. The basic quanta of real life prevent anything possibly meaningful in a sensory fashion. Period.
6. ### Distortion down to -300 dB, what exactly does that mean physically?

This of course a ridiculous choice of course for doing reconstruction. One can design either a constant delay, or mixed delay filter of quite finite length for any purpose, while providing reconstruction to any arbitrary level, say, under 1 LSB, without having to resort to sinc functions, etc...
7. ### Distortion down to -300 dB, what exactly does that mean physically?

Needs a distance chart, too, but it does make the point.
8. ### Distortion down to -300 dB, what exactly does that mean physically?

No, I'm hardly saying that. Useful sensation happens from about -10dB SPL to about 90dB SPL then the mechanisms start to choke. At 140dB you risk instant hearing loss. 194dB would destroy your middle ear in one pulse. Also your house, your trees, your car, your land, your body. The point is...
9. ### Distortion down to -300 dB, what exactly does that mean physically?

What are you even talking about? I've designed digital filters since the late 1970's. I've published papers on the subject, as well as papers on the audibility of artifacts due partially to filtering, etc. I can't even tell if you mean "complex filters" (meaning coefficients with an imaginary...
10. ### Step Response: Does It Really Matter?

That's quite some allpass filter, but it can be done. :D
11. ### Step Response: Does It Really Matter?

Amen to that! :D :D :D
12. ### Step Response: Does It Really Matter?

Well, this guy does fit one of the stereotype annoying people I meet in audio. Those who refuse to accept the science are quite common on both the "nothing matters" and the "audiophiliac" side. This hasn't been very well helped by some older papers that are correct, but didn't choose the best...
13. ### Step Response: Does It Really Matter?

That doesn't even mean anything. Where do you measure this poorly defined signal? What time window? What contribution from local acoustics? Again, you simply deny the actual issues at hand, and can't even explain what you're talking about in terms of measurement. "The amplitude difference in...
14. ### Step Response: Does It Really Matter?

So, you don't know anything, and won't go read papers. You're no better than the audiophools, you believe, you don't think. Perhaps you should be more careful in making ridiculous, foolish claims. You can't even, apparently, tell me which frequency response you think matters. So tell me, do...
15. ### Step Response: Does It Really Matter?

Seriously? You have to ask about matching between channels? Go read Toole's work. Just do it. Then learn about direct vs. indirect sensation, how that interacts with rooms, the effects of rapid phase shift (as opposed to slow phase shift), and how the ear works. Learn about how directional...
16. ### Step Response: Does It Really Matter?

Nonsense, radiation pattern, phase/time response, matching between channels, at least can matter in addition to frequency response.
17. ### Step Response: Does It Really Matter?

Um, I said that back on about page 1. If you see multiple drivers one at a time on a loudspeaker impulse response the crossover needs a lot of work. I don't do IIR crossovers for a reason.
18. ### Step Response: Does It Really Matter?

Benny, go to www.aes.org/sections/pnw Go to the past meeting recaps, go back a few years, to the FFT workshop. Right there is a clear way to measure loudspeakers, or the linear part of pretty much any audio system. It's freeware. You can just take it, load octave, use your favorite playback...
19. ### Step Response: Does It Really Matter?

Apparently another article was written here, but has since met oblivion. To answer one question, Benny, yes, in fact I *AM* the kind of person who can measure a speaker response and relate it to human perception. It's part of what I do every day at work.
20. ### Dynamic range, loudness war, remasters.

As several people have pointed out, you can't compress the (*(*&(* out of an LP the way you can out of a CD. The mechanics of the LP won't permit it. So, when the ability to MAKE IT EVEN LOUDER was given to the A&R guy, there y'go.