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In Reply to: RE: "How electricity flows in an AC circuit" posted by Ugly on August 13, 2022 at 08:57:47
It appears you fell into my trap, I wanted to talk about audio cables all along. If you feel more comfortable talking about transmission lines and waveguides my suggestion is start your own thread. It appears you're not familiar with the Poynting vector as your so called corrections make no sense. Maybe you should research this whole subject, Google is your friend.Did you miss the subject line for this discussion, How electricity flows in an AC circuit?
What am I looking for? I'm looking for an answer to my oft repeated question, what is the audio signal in audio cables? In order to make design decisions on cables it would be helpful, important, to know what the "audio signal" is so that distortion and noise can be minimized.
Edits: 08/13/22 08/13/22 08/13/22Follow Ups:
"so that distortion and noise can be minimized."
But you closed the conversation off to considering anything but coax. Why ignore an entire audio industries wealth of knowledge by immediately making off limits the industry standard circuit topologies designed to accomplish those exact goals?
You misunderstand. I only used the *quote* in my OP to raise the general subject of cables. More specifically audio cables. Obviously, I don't wish to limit the discussion to coax. Coax happens to be the cable used on the Wiki page for illustrating Poynting vector. It's just a jumping off Poynt. I'm primarily interested in audio cables, not "industry standard circuit topologies" What is the "signal" in audio cables? And how do internal and external forces affect the "audio signal?" How does the signal get distorted? If someone believes all cables sound about the same that's OK too.
Edits: 08/17/22 08/17/22 08/17/22 08/17/22 08/17/22
Seems like going out of the way to ignore industry topology trends, especially when wondering about best usage of something regularly used by the industry such as cables, you risk not seeing some important data points that could be valuable. For example, choosing a truly well balanced circuit and fully bipolar differential signals allows a certain level of noise and distortion rejection/cancelling completely unavailable to a system utilizing pure single ended/coax signals and hardware. You can still throw a picture of some twisted pairs in the fridge, you know.
Edits: 08/22/22
The trouble is that "industry standards" or "industry data points" - whatever that means - has little relevance to the discussion at hand. What industry are you referring to? The audio industry - specially the high end audio industry - has very few standards or requirements or regulations. There are no standards for polarity, wire directionality, fuses, power cords or cables. [NOTE: I'm not referring to function here, I'm referring to SOUND QUALITY.] Obviously a fuse must function to protect the electronics, for example. The debate is still on going regarding balanced vs unbalanced cables anyway. Ditto for shielded vs unshielded, or copper vs silver conductors. I'm not referring to theoretical functionality, I'm referring to SOUND QUALITY.There are no standards for sound quality, not the ones I'm talking about. Sure there are specifications, but that's not the same thing as sound quality as we know. The same cables or electronics or CD can sound radically different in different systems and different rooms.
The question remains: What is the "audio signal" in cables? If we knew what exactly were dealing with, what is being affected by internal and external factors, like RFI and vibration, we could build better fuses and cables. And even better amplifiers. I'm not referring to theoretical physics or electronics, or even functionality, I'm referring to SOUND QUALITY.
1. Audio waveform
2. Current
3. Electrons
4. Voltage
5.:Poynting vector
6. Magnetic field
7. Electric field
8. Electromagnetic wave
Edits: 08/23/22 08/23/22 08/23/22 08/23/22 08/23/22 08/23/22
Just couldn't figure out what industry I was referring to, eh? mmmhmmm fun game.
Who said anything about "sound quality", however it is you would have percieved such a thing? For all I know you are one of those people who likes more noise and distortion than the program material contains.
Earlier you said you wanted to find a way to achieve lower noise and distortion so I recomended balanced/differential..... Which *you* may still be debating the merits of....don't know, but others have quantified these things long ago. No doubt you will rationalize rejecting all existing empirical evidence with a goofy smile and a hand wave and that is AOK by me.
I just brought up sound quality. Does that surprise you? Why else would I be interested in the "audio signal" in cables and how to improve it? Why else would I say, once you can identify the "audio signal" in cables then you can go about trying to decrease the noise and distortion? I like your goofball comments, though. We're about through here, aren't we?
Edits: 08/24/22
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