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Home Streaming Audio Network How a network switch affects audio playback – An extreme deep dive!

How a network switch affects audio playback – An extreme deep dive!

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How a network switch affects audio playback – An extreme deep dive!

What did we see?

Below we walk through all the measurements we’ve taken. It’s a lot of data, so we can well imagine you squinting after walking past all the footage. Your author can hardly take a look at another measurement report. Under each switch we put a summary in plain language. So in case you just want to know what we found, just read the text.

Note: the noise measurements on the LAN side – measurements with RF Probe LAN in the name – were measured on an active cable. This is to make realistic measurements. So the spikes between 4 and 10 MHz are actual data you see running through the cable. This is correct. 

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6 COMMENTS

  1. Hi Jaap,

    really interesting test!
    What surprises me is that there is no clear correlation between phase noise and jitter – since they are just two sides of the same coin.

    I believe that the Pura the AMMONITE switches perform well because they have better phase noise in the Ethernet signal by using the OXCO clocks. That would at least be a coherent explanation that would also agree with John Swenson’s thesis. Then we would have two things affecting the sound: common mode noise and phase noise.

    Have you found a dependency regarding the frequency range of the common mode noise to worsen the streamer clock – I would be interested. I could not clearly assign this in the measurements.

    Best regards,

    Eric

  2. Hi Jaap,

    really interesting test!
    What surprises me is that there is no clear correlation between phase noise and jitter – since they are just two sides of the same coin.

    I believe that the Pura the AMMONITE switches perform well because they have better phase noise in the Ethernet signal by using the OXCO clocks. That would at least be a coherent explanation that would also agree with John Swenson’s thesis. Then we would have two things affecting the sound: common mode noise and phase noise.

    Have you found a dependency regarding the frequency range of the common mode noise to worsen the streamer clock – I would be interested. I could not clearly assign this in the measurements.

    Best regards,

    Eric

  3. When you compared switches, does noise peaks appeared the same frequency points on each switches and how big was the general noise floor levels on them? It would be nice to see spectrum analyzer screen shots from each switches how then behaved.

  4. When you compared switches, does noise peaks appeared the same frequency points on each switches and how big was the general noise floor levels on them? It would be nice to see spectrum analyzer screen shots from each switches how then behaved.