<div dir="ltr">They're "Korg ICs" but not totally proprietary... the upd-65010cw-113 in these modules are NEC upd65000 series custom order gate arrays. I don't know if they all have NEC branding or if any have Korg.<br><div><br></div><div>Nathan</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jun 25, 2023 at 9:21 PM Adam (synthDIY) <<a href="mailto:synthdiy@adambaby.com">synthdiy@adambaby.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>I do love the sound of 1980s 12-bit delays!<div><br></div><div>I have a variety of Rolands, but the Korg unit I have is a SDD-3000, quite a different animal (and looks to be actually 13-bit from the circuit).</div><div>When you say "Korg ICs" , are there proprietary Korg chips in these things?</div><div>Roland certainly got into this game, using the same chip across a variety of Boss products.</div><div><br></div><div>A<br><div><br><blockquote type="cite"><div>On 26 Jun 2023, at 5:23 am, NT <<a href="mailto:nathan@idmclassics.net" target="_blank">nathan@idmclassics.net</a>> wrote:</div><br><div><div dir="ltr">I got obsessed with this era of Korg delay since I first got a DSS-1. These are the same Korg delay ICs as used in the SDD-1000 and SDD-1200 dual version. I forget if the IC in the Poly 800 mk2 is the same or an adjacent version, but it's also very close.
I think these are just grimey and warm enough to get excited about if that's your sweet spot. The character they add to DSS-1 and Poly800 is very nice. <div><br></div><div>At one point I was going to convert a DSS-1 delay board to be standalone until discovering it was also used in the 1000/1200. Thankfully nothing special is needed to control these - check out the SDD-1200 service manual for a basic implementation with a CV controlled clock source and modulation, and compare to the DSS-1 pdf pg22 to see whats missing on there. A lot of the front panel parts on the SDD are redundant for the second channel.<div><br></div><div><a href="https://www.synthxl.com/wp-content/uploads/2020/06/Korg-SDD-1200-ServiceManual.pdf" target="_blank">https://www.synthxl.com/wp-content/uploads/2020/06/Korg-SDD-1200-ServiceManual.pdf</a><br></div><div><a href="http://www.buchty.net/korg/files/Korg%20DSS-1%20Service%20Manual.pdf" target="_blank">http://www.buchty.net/korg/files/Korg%20DSS-1%20Service%20Manual.pdf</a><br></div><div><br></div><div>Nathan</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 21, 2023 at 10:03 AM Roman Sowa <<a href="mailto:modular@go2.pl" target="_blank">modular@go2.pl</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">It uses masked ROM microcontroller made probably exclusively to KORG, so <br>
unless someone searches forgotten cellars of KORG factory, no info will <br>
ever come up.<br>
Why don't you hook up logic analyser or a scope in working DSS-1? I <br>
don't expect anything more complex than a few bytes sent only when <br>
effect type is changed. Maybe with very few parameters too.<br>
<br>
But is it so impressive to make a module aout of it?<br>
12-bit digital delay from the 80's<br>
<br>
Roman<br>
<br>
W dniu 2023-06-21 o 13:46, mark verbos via Synth-diy pisze:<br>
> Hi,<br>
> <br>
> I have a couple of KLM-1050 PCBs in a drawer in my shop. That’s the delay board from the DSS-1, maybe others as the KLM-775. Over the course of 20 years or so that these PCBs have lingered with me, I have occasionally wondered if they could be turned into a standalone unit. Looking at the schematic, the audio path in and out seems complete. The control of delay time, feedback and effect level is on 3 digital pins labelled “DATA”, “CLK”, and “STB”. Has anyone cracked the code to control these? It’s outside my area of expertise, but maybe someone has taken a deep dive.<br>
> <br>
> Mark<br>
> <br>
> <br>
> <br>
> <br>
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