<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The complete wallk-through explanation of the Rhodes Chroma is one of my favourite bits in Hal Chamberlin's book too. That synth is well documented one way or another!<div class=""><br class=""><div class="">
<div>Tom</div>
</div>
<div><br class=""><blockquote type="cite" class=""><div class="">On 4 Feb 2022, at 13:57, grant <a href="http://musictechnologiesgroup.com" class="">musictechnologiesgroup.com</a> <<a href="mailto:grant@musictechnologiesgroup.com" class="">grant@musictechnologiesgroup.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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 was also going to say Junglieb. He has most of his stuff online. The Prophet 5 technical manual would be great for this.</div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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=""></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="https://www.jungleib.com/" class="">https://www.jungleib.com/</a></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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=""></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">Also the Rhodes Chroma and Emu Emulator manuals should be noted for their detail. I'm sure there are other great ones too.</div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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=""></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">GB</div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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=""></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">------ Original Message ------</div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">From: "Tom Wiltshire" <<a href="mailto:tom@electricdruid.net" class="">tom@electricdruid.net</a>></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">To: "Jared Anderson" <<a href="mailto:jarander@gmail.com" class="">jarander@gmail.com</a>></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">Cc: "Synth-Diy mailing list" <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>></div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">Sent: 2/4/2022 2:53:39 AM</div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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="">Subject: Re: [sdiy] Understanding 80s Synth Architectures</div><div style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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=""></div><div id="x41abcc34c91340f" style="caret-color: rgb(0, 0, 0); font-family: "Segoe UI"; font-size: 16px; 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; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><blockquote cite="x-msg://113/2A47D5F0-B114-4B94-9B4B-BCF711F9BDBD@electricdruid.net" type="cite" class="cite2" style="margin-left: 5px; margin-right: 0px; padding-left: 10px; padding-right: 0px; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); margin-top: 3px; padding-top: 0px;">I second Hal Chamberlin's book as a great resource, but I'd also say that I learned most from reading old service manuals. The Sequential ones by Stanley Junglieb are particularly good and give an overview of how the system works before diving into the details.<div class=""><br class=""></div><div class="">Tom</div><div class=""><br class=""><div class=""><div class="">==================<br class=""> Electric Druid<br class="">Synth & Stompbox DIY<br class="">==================</div><div class=""><br class=""></div><br class="Apple-interchange-newline"></div><div class=""><br class=""><blockquote type="cite" class=""><div class="">On 4 Feb 2022, at 10:31, Jared Anderson via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hello,<div class=""><br class=""></div><div class="">You might like to try to get a hold of a copy of "Musical Applications of Microprocessors" by Hal Chamberlin.</div><div class="">There may be PDFs floating around on the net somewhere...</div><div class=""><br class=""></div><div class="">Cheers</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 4 Feb 2022 at 11:25, ackolonges fds via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Hi Everyone,</div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;"><br class=""></div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">As the local SDIYer I sometimes get asked to try and fix synths from the 80s like various Rolands, Korgs, Oberheims etc. and I generally just try to pinpoint the rough area of the issue and replace logic chips until the issue is resolved...</div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;"><br class=""></div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Most of these synths have a CPU connected to everything via a parallel address bus and a parallel data bus, with all sorts of glue logic chips doing various things. They also usually just have 1 DAC, time-domain multiplexed to all of the different parameters via more logic chips.<span class="Apple-converted-space"> </span><br class=""></div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;"><br class=""></div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Obviously this is very different to the modern ways that microcontrollers and DACs are used in synths, and since I wasn't around in the 80s, these older architectures are very foreign to me. To aid in my troubleshooting efforts, I would love to better understand the details of how these architectures work, so I was wondering if anyone on here would be able to point me to any resources that could explain these types of systems to me, be they websites, articles, or books?</div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;"><br class=""></div><div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Thanks a lot for any advice you might have.<br class=""></div></div>_______________________________________________<br class="">Synth-diy mailing list<br class=""><a href="mailto:Synth-diy@synth-diy.org" class="">Synth-diy@synth-diy.org</a><br class=""><a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" class="">http://synth-diy.org/mailman/listinfo/synth-diy</a><br class="">Selling or trading? Use<span class="Apple-converted-space"> </span><a href="mailto:marketplace@synth-diy.org" class="">marketplace@synth-diy.org</a><br class=""></blockquote></div>_______________________________________________<br class="">Synth-diy mailing list<br class=""><a href="mailto:Synth-diy@synth-diy.org" class="">Synth-diy@synth-diy.org</a><br class=""><a href="http://synth-diy.org/mailman/listinfo/synth-diy" class="">http://synth-diy.org/mailman/listinfo/synth-diy</a><br class="">Selling or trading? Use<span class="Apple-converted-space"> </span><a href="mailto:marketplace@synth-diy.org" class="">marketplace@synth-diy.org</a></div></blockquote></div></div></blockquote></div></div></blockquote></div><br class=""></div></body></html>