Jump to content

Cogito

  • Posts

    40
  • Joined

  • Last visited

  • Country

    United States

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. @TomJ and @The Computer Audiophile may not like it but I agree 100% with the above statement. The problem is, he keeps making assertions with little understanding of the subject. We are here to exchange information and learn from each other. If you correct the person, it becomes a pissing context. If you tell the person to go read for himself, the big honcho doesn't like it.
  2. The phrase galvanic isolation does not belong when discussing ethernet. Galvanic Isolation means, there is no electrical connection between the two end. Differential arrangement reduces the noise, it does not eliminate it.
  3. Already did. Look at the third paragraph in this post. https://audiophilestyle.com/forums/topic/64138-best-ethernet-cards-for-streaming/?do=findComment&comment=1163704 @The Computer Audiophile My comment about googling may not have been polite, but I do find your stalking and heckling childish. I didn’t expect it from the founder of this site.
  4. That looks like a DAC with a network streamer built in. New to me.
  5. Two points: The very next sentence begins with “I do not know the exact details…” Context. I was making a point to the original poster who implied waveform trace of digital communications somehow effects the audio. I was trying to demonstrate that is not the case with an example. None of the details you posted invalidate my point. Original poster’s interpretation and understanding is still wrong. BTW, kudos for doing your home work by “googling”. 😀😀
  6. Ethernet is a generic term for copper based network. Copper based and optical networks are totally different technologies. They do not talk to each other. Think about them like Truck and a Ship. To transfer the payload from the truck to the ship a third party system needs to unload the cargo from the truck and load it in the ship. Ethernet to optical converters play the role of that third party system.
  7. i get the feeling you are conflating two different technologies. I was referring to the network side of the PC based music server. Let me explain. In our homes we have copper based and wireless networks. Wireless network is not recommended for streaming as it has high levels of radio freq noise. Even in the wired network there is lot of noise present. Since the goal is to reduce the noise getting into the DAC, it needs to be eliminated before it enters the music server PC. The solution I am talking about works like this. Just before the music server convert the electrical signals to optical and pass them on to the PC. The PC will have a Optical NIC where the optical signals are converted back to electrical. The SFP are installed on either end of the short optical cable and the data is still in the IP domain where all the error detection and error correction protocols are embedded, I am not sure what parameter you would measure which are relevant to audio. If the parts are Of decent quality, there should be any issues. I am not aware of any use of SFP modules between music server and DAC.
  8. Electrical noise is very low level. When converting electrical signals to optical, we look for signals with certain properties of our interest, like voltage and frequency. Think about it this way, if I am interested in catching butterflies, the net would have relatively large gaps between the fibers. Those gaps are designed to trap insects of certain size. Trillions of airborne insects will pass thru it and we would not even realize. Its a well established technology. Dont know what that means and how it is related to electrical to optical conversion. There are different uses. Virtually in every datacenter, all communications occur over fiber optic cables, often the distances are within a few feet. Jitter (timing errors) are part and parcel of ALL digital telecommunications. All telecommunication protocols like Internet Protocal (IP) have methods built in to hand timing errors, data corruption, missing data etc. etc. in real time. Jitter is NOT an issue that one worries about in telecommunications, in audio world yes, jitter is a big deal.
  9. True. We all have our subjective biases and limitations to objective knowledge. We struggle with those all the time. We constantly are seeking more information, more knowledge, to enhance our experience of this hobby. Some of the time we come across good info, most of the useless info. But when someone is posting blatantly false information, it needs to be pointed out, IMO. If I post some wrong info and you point it out, I will take a step back and try to digest it and correct myself. If OTOH, I double down and make more wrong assertions, I would hope someone points it out. That’s exactly what happened here.
  10. @One and a half You are misinforming the readers. Google is free, use it.
  11. ‘Only the detected bits are converted to light and transmitted over the fiber optic cable. Electrical noise is so low, it is not detected by the converter and hence not transmitted over the fiber.
  12. Holo Audio is already doing Electrical to Optical Conversion and back to Electrical in its USB input to get rid of noise (galvanic isolation).
  13. That’s the most effective way to get rid noise on Ethernet. You can setup a Ethernet to optical converter, fiber cables and fiber optic NIC at fraction of the cost of audiophile NICs.
  14. Digital network signals (Ethernet) have no bearing on sound quality. The shape of the signals you saw on the oscilloscope have no impact on the sound. Network signals are at 2.5v which is divided into 2 states, 1 and 0. I don’t know the exact details, voltage ranges to represent 0 and 1 are huge, something like 0.5v and above represents 1 and anything below 0.5v represents 0. Even in the worst case, any lost data packet is retransmitted. In a home LAN, retransmissions do not cause any I interruption in the music stream. The noise in the network is what causes problem to the audio. Ethernet cables act line antennas. They pickup all kinds of noise which enters the computer and eventually the DAC thru’ USB interface. Noise filtration/elimination is the key to good audio.
  15. unlike PCM there are no DSD sources available in multiples of 48kHz. What does checking “48k DSD” box do?
×
×
  • Create New...