Why please, its a legitimate question, we are dealing with a.c. signals so which way does the current flow, and how much do the electrons jiggle🙂
Suggest some reading on perception and how music effects us and our ability to recognise and be affected by rhythm, Your answer reeks of a GEB Audiophile who's hearing (unlike the rest of us mortals) is infallible....🙂
No it isn't a stupid provocation (unlike some of your posts I could have said but didn't), understanding current flow is critical if you are going to design a layout to achieve the best fidelity in a circuit... claiming directivity with ac signals is a bit silly, as is claims of electrons being lined up or their paths smoothed out by esoteric components... You have to think in terms of EM waves not electrons because electrons just jiggle about at a leisurely 0.1mm/sec (or their about), so again, what is the current loop direction when an AC signal is present...
That is very nice, but what are you suggesting? Is there something that offends you about my equipment?
Well in reality maybe, but this is audio and we have things such as the Bybee QP THAT can remove noise whilst leaving the signal unaltered😀...
Perhaps nicoch58 belongs to that subset of audio engineers who believe that in order to understand and design relatively undemanding low frequency circuits you need to have particular domestic audio equipment. Without these you will repeatedly get Ohm's Law, Kirchoff's Laws and Fourier theory wrong.
Or is it the other way round?
Or is it the other way round?
Let's not discuss your choice of power amps again.
(Manic Depressive Disorder 101 : A lying mind of it's own)
Needs must. It will be decommissioned before xmas. It's temporary replacement is nearly fixed.
Afair there is a small percentage (i have to look it up again but it think <2-3%) of humans who do not percept a "phantom sound source" in the median plane if two loudspeakers in front radiate an identical signal.
So, this subgroup´s perception is much more accurate (from a technical/engineering point of view) but these people can´t benefit from stereo reproduction
In a broader sense it is quite funny to describe the reproduction of sound as a pure engineering effort as engineering can´t tell anything about the percepted quality of an imperfect reproduction.
Small differences that seem to disappear when unsighted testing is done.... and how would you define a good system.
What is it if it isn't engineering..... It involves analogue and digital engineering, acoustic engineering, mechanical engineering, measurements and listening are all part of this process!
Marce,
You might just want to build a simple discriminator circuit for the AC mains.
All it requires is a simple center tapped transformer, tap common, a pair of diodes from the end of each winding charging matched capacitors with high value discharge resistors across them. If both diodes charge to positive, you should not be able to measure any voltage between them. However you will find there is one.
Flipping the AC mains will flip the difference. This is called DC on your AC. It is caused by asymmetric loads on the power line. This has the effect of moving the zero point in power transformers BH loops. A small decrease in efficiency results.
What actually may be happening in the clipping audio power amplifier may be a shift in the power transformers conversion efficiency. The test would be to precisely measure the rails voltage under no load before and after the clipping episode.
You might just want to build a simple discriminator circuit for the AC mains.
All it requires is a simple center tapped transformer, tap common, a pair of diodes from the end of each winding charging matched capacitors with high value discharge resistors across them. If both diodes charge to positive, you should not be able to measure any voltage between them. However you will find there is one.
Flipping the AC mains will flip the difference. This is called DC on your AC. It is caused by asymmetric loads on the power line. This has the effect of moving the zero point in power transformers BH loops. A small decrease in efficiency results.
What actually may be happening in the clipping audio power amplifier may be a shift in the power transformers conversion efficiency. The test would be to precisely measure the rails voltage under no load before and after the clipping episode.
Maybe I have something wrong. My understanding of things was that a soundwave travels to both ears and depending on the time difference that wave hits the left and the right ear sensing of direction is possible. Zero time difference -> zero difference of angle between ear and source (English is not my first language, I hope you are still able to follow) -> source is dead center.
When there is a sound displayed from two speakers that project the same waveform and the run time difference from the left speaker to the left ear and the right speaker to the right ear is zero, then to me an accurate perception is for that sound to not emerge from the speakers but from the center between the speakers.
OK I have to bite. What has this got to do with resistors?
Mains DC and Transformers gives a good intro to the subject.
Yes, the spacing of ears is not enough to have accurate placement by time of arrival alone. Think phased array theory. The HRTF is required to actually position things. So at least two effects in place to locate things (and how we can tell if something is in front or behind of us with 2 ears). That it works at all is amazing, that it goes wrong now and again is not suprising.
And if you reduce them way under the noise floor? Aren't they effectively removed? 😉
And BTW I've told originally of an apparent more or less harmonic content, not necessarily eliminated but possibly increased or decreased in level.
Fine, it falls under English nuances I may be missing. Thanks for the suggestion, I'll try to use it 🙂
Fine but still can't see how this possibly contradicts what I'm stating... Maybe I could define it better: distortion can both increase or decrease level of harmonics.
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