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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Hi!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">You can load some German articles about the SN76477 from my homepage, as I built my first synthesizer with the SN76477 in the 80ies.<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">You can find them via </span><span lang="DE-AT" style="font-family:"Calibri Light",sans-serif;color:black"><a href="http://www.ullrich.at.tt" target="_blank"><span lang="EN-US">http://www.ullrich.at.tt</span></a></span><span lang="EN-US" style="font-family:"Calibri Light",sans-serif;color:black">
/ Music (Left Menu) / Synthesizer-DIY (Top-Menu)<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" style="font-family:"Calibri Light",sans-serif;color:black">Ciao<br>
Peter<br>
<br>
</span><span lang="DE-AT" style="font-family:"Calibri Light",sans-serif;color:black"><a href="http://www.ullrich.at.tt" target="_blank"><span lang="EN-US">http://www.ullrich.at.tt</span></a></span><span lang="EN-US" style="font-family:"Calibri Light",sans-serif;color:black">
(my webpage)<br>
</span><span lang="DE-AT" style="font-family:"Calibri Light",sans-serif;color:black"><a href="http://www.rc100-usb.at.tt" target="_blank"><span lang="EN-US">http://www.rc100-usb.at.tt</span></a></span><span lang="EN-US" style="font-family:"Calibri Light",sans-serif;color:black">
(Roland Sampler Tool)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-AT" style="font-family:"Calibri Light",sans-serif;color:black"><a href="http://synpro.heimat.eu/datadial.htm"><span lang="EN-US">http://synpro.heimat.eu/datadial.htm</span></a></span><span lang="EN-US" style="font-family:"Calibri Light",sans-serif;color:black">
(DataDial Synth Addon)</span><span lang="EN-US" style="font-family:"Calibri Light",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>Von:</b> Synth-diy [mailto:synth-diy-bounces@synth-diy.org]
<b>Im Auftrag von </b>info@synthcube.com<br>
<b>Gesendet:</b> Mittwoch, 23. <span lang="EN-US">Mai 2018 18:00<br>
<b>An:</b> Tim Parkhurst <tim.parkhurst@gmail.com>; cheater00 cheater00 <cheater00@gmail.com><br>
<b>Cc:</b> synth-diy mailing list <synth-diy@synth-diy.org><br>
<b>Betreff:</b> Re: [sdiy] TI 76477 Space Invaders sound chip detailed analysis<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">So I remember first being exposed to the SN76477 via Omni Magazine in what must have been sometime from about 1978-1980. We are offering a $25 store
gift certificate to the first person to send us the article (or a link to it)-- i vaguely remember breadboarding a simple circuit with the SN76477 on Radio Shack breadboard... <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Anyway, other than the Thomas Henry SN Voice and Supercontroller, I haven't seen many (or any) modular synth designs that use the chip... wondering
why? <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">They're still plentiful and relatively cheap given the range of capabilities... maybe we'll sponsor a module design contest around the SN76477 to see
what emerges... <o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">-------- Original Message --------<br>
Subject: Re: [sdiy] TI 76477 Space Invaders sound chip detailed analysis<br>
From: Tim Parkhurst <</span><a href="mailto:tim.parkhurst@gmail.com"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif">tim.parkhurst@gmail.com</span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">><br>
Date: Wed, May 23, 2018 2:33 am<br>
To: cheater00 cheater00 <</span><a href="mailto:cheater00@gmail.com"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif">cheater00@gmail.com</span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">><br>
Cc: synth-diy mailing list <</span><a href="mailto:synth-diy@synth-diy.org"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif">synth-diy@synth-diy.org</span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">You should also check out what the amazing Thomas Henry managed to do with the 76477. Even got a few octaves of CV response from it.<o:p></o:p></span></p>
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<p class="MsoNormal"><a href="http://www.birthofasynth.com/Thomas_Henry/Pages/SN-Voice_main.html" target="_blank"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif">http://www.birthofasynth.com/Thomas_Henry/Pages/SN-Voice_main.html</span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Tim (if I had a quarter for every 76477-powered video game I played...) Servo<o:p></o:p></span></p>
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<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">On Tue, May 22, 2018 at 9:16 PM, cheater00 cheater00 <</span><a href="mailto:cheater00@gmail.com" target="_blank"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif">cheater00@gmail.com</span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">>
wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">I've just found this while surfing the internet, an analysis of the 76477 sound chip's digital sound circuits. This includes the unique shift-register
based noise circuit, as well as the noise filter circuit (which is analog):<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><a href="http://www.righto.com/2018/05/inside-76477-space-invaders-sound.html" target="_blank"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif">http://www.righto.com/2018/05/inside-76477-space-invaders-sound.html</span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Here's an earlier anysis of the analog circuitry:<o:p></o:p></span></p>
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<p class="MsoNormal"><a href="http://www.righto.com/2017/04/reverse-engineering-76477-space.html" target="_blank"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif">http://www.righto.com/2017/04/reverse-engineering-76477-space.html</span></a><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">I wonder if anyone has tried cloning the chip for synth use, with modern features like eg tuning.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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