Dear all, since I'm going to get into quite a bit of detail, I'll start with the tl;dr first :D
* has anyone experience with electronic logic circuits and might help me to analyse and understand some schematics? * is it possible to port an existing digital circuit (consisting of a clock, timing signals, counters, latches and memory read/writes) into Faust? Now for the long version: In 2019 I was fortunate enough to acquire an old Ursa Major Stargate 323 hardware reverb from the institute of musicology at the JGU Mainz (thanks Albert!). Ursa Major was founded by Christopher Moore and is mostly know for the Space Station Delay, which some industry professionals still swear by. The Stargate 323 Reverb is an evolution of the Space Station delay algorithms. Since those reverbs are very rare and no official digital emulations exist, I want to try and help keeping this piece of reverb history alive . To be clear: I'm talking about straight up reverse-engineering here. If the moderators think this is something that shouldn't be discussed publicly on this list, please let me know. The Ursa Major brand was sold to AKG in 1986 and no products have been released under this brand since then. As far as I know all related patents have expired. Christopher Moore previously continued working under the brand name Seven Woods Audio, but the website is not available anymore and the domain name is now for sale. I also want to make this project completely open source and do not have any commercial intentions. While the reverb algorithms are proprietary, the digital circuit design is fairly simple by today's standards. Ursa Major was a small company and inside is just a lot of 8bit EPROMS, Latches, Counters etc. all clocked by an 8Mhz ceramic oscillator. No CPU or proprietary silicon whatsoever. Because the entire circuit structure is completely humanly readable, my idea is to just "port" the digital circuit into modern software instead of trying to approximate the algorithms. So far I have made quite some progress in understanding and analysing the digital circuit components. The official service manual is incredibly detailed and I have also dumped the contents of all eeproms. But I'm just a hobbyist and if I want this project to succeed, I'm going to need help. Which brings me back to my initial questions and this mailing list :) I'm happy to hear any questions/ideas/etc.! Best, Robert
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