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TomJ

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  1. To remember: This is in the Objective-Fi arera of the forum - not in the Subjective-Fi area. So subjective impressions you can share all over net, but not in this area. I only whant to find objective answers how the digital transmission can make digital data sound different. If this is trolling, than this area should be renamed in something like "esoteric hifi conspiracy theories". If data arrives correctly at the point of use (DAC) and a sound change still takes place, then I come to a conclusion that the sound change can only take place during or after the D to A conver
  2. I mean only during the conversion of D to A, or then in the analogue chain. The conversion is influenced by HF of PSU entering the DAC. But before conversion, there is no sound alive to change😀 - only data (and electrical noise/HF) and with TCP/IP and USB we get the data without manipulation into the DAC.
  3. I am here get answers to the question wow digital signal transmission can change the sound and where. So I learned, that the sound can only be changed while converting from D to A inside the DAC. And that network devices can not change the sound, but influence the converting. This is done by electrical noise from the network device over the electrical path. Jitter problems in Switches has nothing to to with worsen sound quality directly, but can produce more electrical noise. I learned, that an Isolator do not block all the noise, just a percentage. But if I prevent noise coming
  4. I think with this story the musician should be the one who prepares the meal and the result is a matter of taste. But the scientist can determine the quality of the ingredients.
  5. My hobby is not to look at numbers - I dont wont to spend my time in testing thousands of devices in thousands of combination. and when i am done to hear from someone else there is a 1001th device to test. I want to hear music in the finest way. Its like pkane2001 mentioned: its like in the middle age. The whole thing reminds me of a story from my studies. I really wanted to use a radiosity program that was only available for linux. Since I wasn't a Linux user, I went to the Linux group at my university with the hope of getting help. But these guys weren't interested in h
  6. Would be a nice job to do A/B test witch these stickers. Once you are done with sticking, you will be so amazed to here your system again, even if the sound get worse, you cant remember how the sound was before.
  7. And bought some audiophile stuff to prevent jitter during listening in my brain:
  8. OK - just pulled the trigger for this amazing new invention: Quantum Stickers. Will stick them on all the parts of my switches, routers, servers, streamers and DAC and im done! 🤣 https://telos-audio.com.tw/sticker/
  9. I thought the effects could not be measured, only heard? But when a company begins to develop a device, it has to define the goals - if that's just "improving sound quality" and you're just messing around with the try and error method, then I can understand the high prices, but also the professionalism and traceability is doubted and people like Amir are most welcome. For example, for a network switch (sorry to overemphasize this topic) at least two things must be achieved: - Noise reduction - could be measured - Data integrity - could be measured Maybe there a
  10. Another Point: If the network "end-point" have to much work to correct false data (TCP/IP), it produce more noise by calculation. (Have there been any measurement about corrupt packages at network endpoints (e.g. streamer) yet? This would increase the reputation of so called audiophile switches, but "you can hear it - no need for measurements"😁) So there are things you can measure regarding sound quality: Measurement of noise level entering the DAC or of the ethernet path. Date integrity of the network transport. (should be easy, because this is daily
  11. So I sum up: Data is not changed on its long way across networks. The correct data always arrives at the network end point (e.g. network streamer) Jitter problems in switches do not cause "worse" data, but produce "noise". "Noise" can "jump" from one side to the other in a device even though there is electrical isolation. Although Ethernet is always galvanically isolated on the data path (if shielding is not used), "noise" is transmitted from the previous one. In order to transfer the data from the network endpoint to the DAC, USB is superior to the other transp
  12. As you can see in my topology the Logitech Squeezebox streamer is the audio playing device - its not a pc. No harddisk / ssd, wlan or other stuff like in pc. The streamer always gets his stream from the LMS Server over Ethernet with LAN isolator - from local files stored on the server or from a streaming provider. The server transcode the stream (local files or streaming provider) into pcm before streaming to the clients (Logitech Squeezebox or KEF LS50). So if i say local playback it means streamed from my own server, not from the streaming provider like Tidal/Qobuz. I am a b
  13. OK - So Toshlink always sound worser than USB. Is this also the case for Ethernet to fiber and back in your opinion? So with ISO-Regen there is no need for audiophile switches and servers?
  14. So the goal is to prevent noise coming into the dac -right? This should be the task of the isolator. But I have understood, that noise can "jump" from one side to the other in the intona -right? And maybe the USB cable #9.1 catch some noise from the environment. But if the isolator would eliminate the noise, than I don't have to care about audiophile server or audiophile switches - right? How about changing the isolator and cable (9.1 + 8.1) with an fiber usb extender like this: https://www.amazon.com/LINDY-42683-Optisch-Elektronik-Schwarz/dp/B00WJ8DNUK/ref=asc_df_B00WJ8DNUK but
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