<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>An update: I have just bought a </span><span lang=EN-US>M-Audio Midisport UNO.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>And I’ve got myself a hum-loop:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>The shell of the UNO’s USB-A plug has a connection to the shell of the MIDI OUT plug (but not to the shell of the MIDI IN plug).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>And my home-built MIDI module (<a href="https://shedsynth.wordpress.com/midi/">https://shedsynth.wordpress.com/midi/</a>) has a metal DIN socket on the front panel which is grounded through the rack.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>And it doesn’t seem to work with my MIDI module:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I measure the UNO’s MIDI OUT signal level at 3.3V, which doesn’t seem enough to light up my 6N138 with recommended 220R series resistor.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>The UNO variously does or doesn’t play through my other MIDI devices.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I wasn’t expecting to ask for help, just thought I’d follow up on this thread when it arrived.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>But now I’d appreciate any guidance.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Al<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> ShedSynth <shedsynth@gmail.com> <br><b>Sent:</b> 14 January 2023 09:52<br><b>To:</b> synth-diy@synth-diy.org<br><b>Subject:</b> RE: [sdiy] M-Audio Midisport Uno Wire to pin ?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Re the video’s complaint that only MIDI IN is opto-isolated: I think I’m right that this is correct implementation (please contradict if not).<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>The MIDI OUT on any device is actively driven from the device’s own power, and whatever MIDI IN you plug that into will/should be opto-isolated so no ground loop or smoke.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>But the video is probably right about the £5 USB/MIDI interfaces not isolating MIDI IN.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Does anybody know any cheap USB/MIDI cables which do isolate?<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Synth-diy <<a href="mailto:synth-diy-bounces@synth-diy.org">synth-diy-bounces@synth-diy.org</a>> <b>On Behalf Of </b>Nathan Trites<br><b>Sent:</b> 13 January 2023 16:26<br><b>To:</b> David Messenger <<a href="mailto:mssngr1@pacifier.com">mssngr1@pacifier.com</a>><br><b>Cc:</b> <a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a><br><b>Subject:</b> Re: [sdiy] M-Audio Midisport Uno Wire to pin ?<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>If you havent sorted this out yet - here is a youtube video where you can see how it's wired: <a href="https://youtu.be/Xv5-5CUNFvI?t=75">https://youtu.be/Xv5-5CUNFvI?t=75</a><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Nathan<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Sat, Jan 7, 2023 at 5:14 PM David Messenger <<a href="mailto:mssngr1@pacifier.com">mssngr1@pacifier.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><p class=MsoNormal>I have to rewire the in/out DINs on a Midisport Uno that lost it's midi <br>plugs. There is one wire that has red-black-yellow and a bare ground, <br>and then the other cable has just red and white. Anyone know which pins <br>each of these wires should be reattached to? TY D.<br><br><br>-- <br>This email has been checked for viruses by AVG antivirus software.<br><a href="http://www.avg.com" target="_blank">www.avg.com</a><br>_______________________________________________<br>Synth-diy mailing list<br><a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br><a href="http://synth-diy.org/mailman/listinfo/synth-diy" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a><o:p></o:p></p></blockquote></div></div></body></html>