<html><head></head><body>Using my old desktop PC I could hear the CPU working as any task that modulated power consumption with a frequency in the audible range slightly affected the voltages the motherboard output.<br>I rather liked this low-amplitude noise, though.<hr>Your computer is connected to the ground potential using a line that has an inductivity above zero which means that if the computer changes the network lines it's ground potential might jump a bit.<br>Perhaps that would be yet another possible explanation: in theory ethernet is truly differential and doesn't contain any ground bounce. But there are many mechanisms that aren't part of that theory...<br><br>Kind regards,<br><br> Gunter.<br><br><div class="gmail_quote">On 5 February 2019 05:43:42 CET, Ralf Mardorf <ralf.mardorf@alice-dsl.net> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k9mail">At first I would check, if continuity, especially shield of the whole<br>chain is intact. Especially check breakout crap. My RME card's breakout<br>cable jack soldering joints are coated with hot glue at delivery, but<br>this doesn't protect against damage of the cables or just against dirt<br>and corrosion. The rear of a tower PC might be inaccessible for regular<br>care. In my experiences T{,R}S jacks and sockets often don't match very<br>good. Time for another RME rant, since the breakout cable does provide<br>XLR from Neutrik, but TRS from elCheapo. To be fair, audio gear of<br>other companies often suffers from low quality manufacturing. I had<br>Behringer gear with analog XLR IOs that suffered from hum noise at<br>delivery, Behringer repaired it, but since it is repair, a jog wheel of<br>that device can't be used anymore, because it jams in the chassis.<br>Ready to use cables and ready to use gear often aren't ready to use,<br>actually they tend to be partial pre-built assembly kits.<br><br>In former times the analog domain often suffered from op-amp<br>random noise, but without fulfilling ISO 9000, gear usually was well<br>manufactured. Nowadays op-amps are from better quality, but lousy<br>manufacturing that does fulfil ISO 9000, as well as some new<br>technology, such as SMPS, are the cause of {EMC,}troubles.<hr>Ardour-Users mailing list<br>ardour-users@lists.ardour.org<br>To unsubscribe or change your mailing preferences please visit:<br><a href="http://lists.ardour.org/listinfo.cgi/ardour-users-ardour.org">http://lists.ardour.org/listinfo.cgi/ardour-users-ardour.org</a><br></pre></blockquote></div><br>-- <br>Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet.</body></html>