<div dir="ltr">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.<div><br></div><div><a href="http://www.birthofasynth.com/Thomas_Henry/Pages/SN-Voice_main.html">http://www.birthofasynth.com/Thomas_Henry/Pages/SN-Voice_main.html</a><br></div><div><br></div><div><br></div><div><br></div><div>Tim (if I had a quarter for every 76477-powered video game I played...) Servo</div><div class="gmail_extra"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><br><br><br><br></div></div></div></div></div>
<br><div class="gmail_quote">On Tue, May 22, 2018 at 9:16 PM, cheater00 cheater00 <span dir="ltr"><<a href="mailto:cheater00@gmail.com" target="_blank">cheater00@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>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):</div><div><br></div><span><a href="http://www.righto.com/2018/05/inside-76477-space-invaders-sound.html" target="_blank">http://www.righto.com/2018/05/<wbr>inside-76477-space-invaders-<wbr>sound.html</a></span><div><span><br></span></div><div><span>Here's an earlier anysis of the analog circuitry:</span></div><div><span><br></span></div><div><span><a href="http://www.righto.com/2017/04/reverse-engineering-76477-space.html" target="_blank">http://www.righto.com/2017/04/<wbr>reverse-engineering-76477-<wbr>space.html</a><br></span></div><div><span><br></span></div><div><span>I wonder if anyone has tried cloning the chip for synth use, with modern features like eg tuning.</span></div>
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