Hi DF96,
Well, if Fourier doesn't do it for anyone, then there are tone bursts and high mark - space ratio DC pulses that can get their motor running.
I suspect that odd signals seem to offer an easier mechanism to uncover problems. Everything I have seen so far over 30 + years are covered by the lowly sine wave.
Well, if Fourier doesn't do it for anyone, then there are tone bursts and high mark - space ratio DC pulses that can get their motor running.
I suspect that odd signals seem to offer an easier mechanism to uncover problems. Everything I have seen so far over 30 + years are covered by the lowly sine wave.
I reserve the right to (mis) quote you on this again at any time and in any context!
ES
Actually there are things in audio that show up with more than an FFT. But I suspect you haven't run into those cases with what you do!
I had offered to run RF parametric measurements on them since some of the early claims kept referring to magical properties in the several GHz range that influenced the sound. It now appears that those measurements are not needed, but I can still do them if needed.
I have a fancy high level pulse generator in my lab at work also. It is an HP unit, I don't remember the number or specs since I haven't used it in about 4 years. I know from experience that it can shock the %&#* out of you and it can source considerable current. I was using it to control a high side mosfet switch on a 48 volt line at 2 MHz, so I know it can make 60 volt pulses.
Maybe BB effect is out of audio band ?...
Ferrite clip-on cable filters response graphs show no noise attenuation at audio frequencies, yet in my experience these change the sound of a system when clipped on a line level audio cable.
How about repeating Stuarts testing with a ferrite filter fitted around a wire, and fitted around the RR and see if the 1kHz sine test gets a result ?.
Eric.
Ferrite clip-on cable filters response graphs show no noise attenuation at audio frequencies, yet in my experience these change the sound of a system when clipped on a line level audio cable.
How about repeating Stuarts testing with a ferrite filter fitted around a wire, and fitted around the RR and see if the 1kHz sine test gets a result ?.
Eric.
If you can't understand the sheer meaninglessness of this, then there's simply nothing further to discuss.
se
I am saying that the BB's actual effect may be out of audio band and the claimed sonic changes are a result of this.
There was an offer to test BB's at higher frequencies - I think this should be done.
Eric.
There was an offer to test BB's at higher frequencies - I think this should be done.
Eric.
Huh, it is well established that power filtering can effect the reproduced audio, why not line level feeds also ?.
Eric.
its also well established that testing yourself is entirely meaningless - worse than meaningless it would seem, since so many do it, then try and attach meaning to it, and then browbeat others with it.
Again, conditions?
Again, conditions?
I test myself every time I get on my road bike and go for a ride, especially on the steep hill just up the road.
OT - just do informal A/B tests on any system that you know the sound of.
Do you guys ever do any A/B testing ?.
Eric.
So when you ride up the hill do you do it at exactly the same time of day every time and make the various allowances for temperature, wind speed and direction, traffic, whether you are riding alone or with others, what you ate in the last 24 hours, the tyre pressure, and what you happen to be wearing?
Or do you just get home, check the time (kinda remembering what time you left) and think "wow - I AM getting better?"
If the latter, that's what I do. Its great for my ego, but it ain't science.
A/B testing? Nah, I go with what I measure (not too accurately, but ok enough) and what I like the sound of.
Doesn't mean I can't recognise poor logic when I see it.
Or do you just get home, check the time (kinda remembering what time you left) and think "wow - I AM getting better?"
If the latter, that's what I do. Its great for my ego, but it ain't science.
A/B testing? Nah, I go with what I measure (not too accurately, but ok enough) and what I like the sound of.
Doesn't mean I can't recognise poor logic when I see it.
Uh... The clip-ons clean up RFI. That's what they were born to do.
So what's the controversy now - do we need double-blind listening tests to prove that ferrite is ferrite, or what?
So what's the controversy now - do we need double-blind listening tests to prove that ferrite is ferrite, or what?
Looking In The Wrong Places Maybe ?.....
I am saying that the BB's actual effect may be out of audio band.
Why not do some higher frequency measurements to characterize them fully ?.
Eric.
I am saying that the BB's actual effect may be out of audio band.
Why not do some higher frequency measurements to characterize them fully ?.
Eric.
At this stage it walks, squawks and smells like a duck - It certainly contains a duck, although someone has painted it to look like a swan.
I think its safe to say its a duck.
If you think a test of its cellular makeup and genetic probing may disclose its a new form of swan, you should feel free to go ahead.
I think its safe to say its a duck.
If you think a test of its cellular makeup and genetic probing may disclose its a new form of swan, you should feel free to go ahead.
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