<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Not so different from the Doepfer MCV4 that I have right here in front of me. <div class=""><br class=""></div><div class="">Mark</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="3FFFE29A-36C1-48FF-9F52-650D23F09881" src="cid:A79D82CB-ABD9-4FA0-A3AB-510FCCACA4C9@fritz.box" class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Sep 28, 2022, at 1:09 PM, René Schmitz <<a href="mailto:synth@schmitzbits.de" class="">synth@schmitzbits.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Hi all,<br class=""></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">I've goggled a bit and it seems this is a clone of the Doepfer MCV1, which apparently was published as a set of articles in<span class="Apple-converted-space"> </span><br class=""></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">the German Magazine "Funkschau".</p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a class="moz-txt-link-freetext" href="http://studiorepair.com/gallery/Doepfer/MCV1/slides/Doepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html" style="color: purple; text-decoration: underline;">http://studiorepair.com/gallery/Doepfer/MCV1/slides/Doepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html</a></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a class="moz-txt-link-freetext" href="https://doepfer.de/alte_anl.txt/MCV1_V1.txt" style="color: purple; text-decoration: underline;">https://doepfer.de/alte_anl.txt/MCV1_V1.txt</a></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a class="moz-txt-link-freetext" href="http://www.pc1ha.franken.de/habel/musik_03.htm" style="color: purple; text-decoration: underline;">http://www.pc1ha.franken.de/habel/musik_03.htm</a></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Best,</p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""> René<br class=""></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><font face="Comic Sans MS" color="#FFFFFF" class="">BestJürk Habel und Dieter Do</font></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif; caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><font face="Comic Sans MS" color="#FFFFFF" class="">epfer, MIDI-Interface für Oldtimer, Funkschau Hefte 9/89, 10/89 und 11/89, Franzis-Verlag, München</font></p><div class="moz-cite-prefix" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">Am 28.09.2022 um 12:36 schrieb Mike Bryant:<br class=""></div><blockquote type="cite" cite="mid:431be29ba67d45199cde3eb23c840013@futurehorizons.com" style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Maybe the original design on the etched PCB was a general purpose MIDI board (hence the matching firmware) and provided an 8 bit GPIO port, but disobeyed the rules and omitted the opto-isolator, so whoever used it added that as well as the DAC they needed for this design on the perfboard. <o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><o:p class=""> </o:p></span></div><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><b class=""><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma, sans-serif;" class="">From:</span></b><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma, sans-serif;" class=""><span class="Apple-converted-space"> </span>Synth-diy [<a class="moz-txt-link-freetext" href="mailto:synth-diy-bounces@synth-diy.org" style="color: purple; text-decoration: underline;">mailto:synth-diy-bounces@synth-diy.org</a>]<span class="Apple-converted-space"> </span><b class="">On Behalf Of<span class="Apple-converted-space"> </span></b>René Schmitz<br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>28 September 2022 11:29<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span><a class="moz-txt-link-abbreviated" href="mailto:synth-diy@synth-diy.org" style="color: purple; text-decoration: underline;">synth-diy@synth-diy.org</a><br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [sdiy] Identification of an unknown MIDI CV interface<o:p class=""></o:p></span></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Hi all,<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">On 28.09.2022 11:30, Ingo Debus via Synth-diy wrote:<o:p class=""></o:p></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><a href="https://florian-anwander.de/moog_prodigy/Unknown_Midi_Interface.jpg" moz-do-not-send="true" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 10.5pt; font-family: Helvetica, sans-serif;" class="">https://florian-anwander.de/moog_prodigy/Unknown_Midi_Interface.jpg</span></a><o:p class=""></o:p></div></div></blockquote></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">The etched PCB looks like a general purpose board. The MIDI stuff and the DAC are on the perf board.<o:p class=""></o:p></div></div></blockquote><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class="">That's what I was thinking too, but what is interesting is that the logo on the EPROM matches the one on the board.<o:p class=""></o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class="">So Hardware and Firmware seem to be from the same origin.<o:p class=""></o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class="">But the rest seems very bespoke and has a high home brew appeal. This doesn't quite fit to me, because who<o:p class=""></o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class="">ever wrote the firmware would know what hardware to drive.<o:p class=""></o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Best,<o:p class=""></o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class=""> René<o:p class=""></o:p></p><p style="margin-right: 0cm; margin-left: 0cm; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></p><pre style="margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: "Courier New";" class="">--<o:p class=""></o:p></pre><pre style="margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: "Courier New";" class=""><a href="mailto:synth@schmitzbits.de" moz-do-not-send="true" class="moz-txt-link-freetext" style="color: purple; text-decoration: underline;">synth@schmitzbits.de</a><o:p class=""></o:p></pre><pre style="margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: "Courier New";" class=""><a href="http://schmitzbits.de/" moz-do-not-send="true" class="moz-txt-link-freetext" style="color: purple; text-decoration: underline;">http://schmitzbits.de</a><o:p class=""></o:p></pre></div></blockquote><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Synth-diy mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="mailto:Synth-diy@synth-diy.org" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">Synth-diy@synth-diy.org</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="http://synth-diy.org/mailman/listinfo/synth-diy" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">http://synth-diy.org/mailman/listinfo/synth-diy</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Selling or trading? Use<span class="Apple-converted-space"> </span></span><a href="mailto:marketplace@synth-diy.org" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">marketplace@synth-diy.org</a></div></blockquote></div><br class=""></div></body></html>