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plissken

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About plissken

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  1. 1GB won't have as tight a tolerance as 10GB. From my understanding all the engineering is in the SFP transceiver.
  2. Here is a video I shot with an Audiophile Switch. It's short and to the point. I would love to see you tell when the switch is in and out of loop.
  3. 1. Switches do have buffers and you can manipulate these with various commands to affect priority que. 2. A buffers sole job is to establish a clock domain boundary for systems that have different timings. 3. My buffer is 1GB of RAM on my JRiver based system. This is why I always point out 'correctly designed/engineered systems'. 4. Even a buffer of a single MB is enough. But what that does is keep the receiver PHY in play longer over the duration. I prefer as much wire speed as possible and buffer up front. Switches that have SFP+ (or SFP10) can do 1 GB. You just
  4. I'd rather use their own White Paper: Q. What about systems in which a very large buffer holds a whole song or whole album? A. A very large buffer where the input completely shuts down while all music is playing can eliminate the phase-noise overlay of upstream sources. However, leakage current is still there. As long as the cable is still plugged in leakage current is still flowing through the cable towards the DAC. So just not sending any packets does not make any difference—the cable has to be unplugged to stop it. Even if there are zero packets from the control system duri
  5. If you've been keeping up with the thread both Miska and Myself have been explaining. 802.3az is something you should read up on for starts. Ethernet operates at full wirespeed. Copy over a 75MB 16/44.1 audio track and it will go at full speed. On GBe it will take a split second. Literally. On well optimized playback systems it will do the same and then let the Ethernet connect sit idle and even bring down the power and also power down certain parts of the Ethernet PHY. The point in time that you are listening was most likely delivered seconds before if not
  6. You are operating under the assumption that switches change your realtime sound quality. That is if you are listening to a 10 minute track it's for the duration. This is simply not the way it works. I've been more than fair in offering cash to anyone that can demonstrate this.
  7. Measure jitter all you want. These are not real time systems. Jitter only appears on data transfer. The higher the speed obtainable the smaller the window of transfer. You can't have jitter when the line isn't doing anything. If you take 10GB and you can realize it's 1250MB/s you can transfer, on an appropriately engineered system, a CD in about .6 of a second. Even if you have a system that can only cache 30-60 seconds of audio your time on the wire at 10GB is going to scale just the same.
  8. How do you know it doesn't. Have you had a listening room made with metal stud yet?
  9. I heard that having your wall framing made of metal stud makes your sound system better vs wood framing...
  10. Which measurements? Ping, and throughput should be the same.
  11. The Melco isn't an audio device. It produces only 25Mhz frequency. I can't hear that high. My best is 14.6KHz.
  12. Sure clocks matter. The one on your DAC the most. My JRiver system can buffer up to 1GB of data. My 10GBe connection maxes out at ~330MB/s. I concatenated a ~45 minute album into one .wav file and flac'd it to 445MB. I start playback and in the time it takes from clicking play to unplugging my network cable the entire song is in buffer. What does any switch $20 or $2300 or any upstream clock have to do with it then?
  13. Jitter is time domain error. It can't exist in a buffer. John will tell you that. Buffers represent clock domain boundaries.
  14. Does the Lumin D2 have a shielded RJ45 port? Good catch. That's why I would like to see a write up of the entire testing regimen. Critical thinking for the win 🙂
  15. IMO, and the data supports my position, the answer is no. Computers (this includes streamers) have Ethernet that is implemented to industry spec. This includes power envelope. What I don't understand is people that champion SM over MM when technically SM being a 10KM and up interconnect requires more power because of the distances involved. I champion what ever is most affordable for your usage. I think in a year or two that SM will be the more affordable option in both tranceiver and cabling. But as it is now an LR (long reach) SFP+ is only ~$56 while a SR (Short Reach
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