<div style="color:rgb(0, 0, 0);font-family:arial,sans-serif;font-size:12pt"><p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true">NOTE:</p>
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<p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true">I still have new-old-stock copies of the MAM Book (2nd edition) available for purchase.</p>
<p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true"> </p>
<p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true">Email me privately if interested.</p>
<p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true"> </p>
<p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true">Cheers,</p>
<p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true"> </p>
<p style="margin: 0.1rem 0; line-height: 1.0;" data-signature-line="true">Jeff</p>
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<p>-----Original Message-----<br>From: Tom Wiltshire <tom@electricdruid.net><br>Sent: Feb 4, 2022 5:53 AM<br>To: Jared Anderson <jarander@gmail.com><br>Cc: Synth-Diy mailing list <synth-diy@synth-diy.org><br>Subject: Re: [sdiy] Understanding 80s Synth Architectures</p>
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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.
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<div class="">Tom</div>
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<div>==================<br class=""> Electric Druid<br class="">Synth & Stompbox DIY<br class="">==================</div>
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<div class="">On 4 Feb 2022, at 10:31, Jared Anderson via Synth-diy <<a class="" href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:</div>
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<div class="" dir="ltr">Hello,
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<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>
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<div class="">Cheers</div>
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<div class="gmail_attr" dir="ltr">On Fri, 4 Feb 2022 at 11:25, ackolonges fds via Synth-diy <<a class="" href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:</div>
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<div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Hi Everyone,</div>
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<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>
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<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. </div>
<div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;"> </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>
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<div class="" style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Thanks a lot for any advice you might have.</div>
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