KVR Audio

Greybox Audio · Post by **Greybox Audio** » Thu Feb 27, 2025 6:46 pm

Today I'm releasing SG-323, the first authentic emulation of the Ursa Major Stargate 323 Reverb. The Plug-In is based on more than five years of work and closely emulates the digital circuits of my own hardware unit. While staying faithfully close to the original it also improves on the hardware by enabling fully variable pre-delay and decay time settings.

The Ursa Major Stargate 323 Reverb was released in 1984 by Christopher Moore and builds on the success of the Space Station SST-282. While originally being aimed at more budget-minded studios at the time, this reverb has become a rare piece of vintage hardware.

Features:

8 reverb programs ranging from small Plates to thunderous Caves

fully adjustable pre-delay & decay time

Resizable UI

DRM free & Open Source

Try it: a demo version can be downloaded here https://store.greyboxaudio.com/download/SG-323_demo.zip
The demo has locked controls but you can switch through all the reverb programs.

Buy it: the full version is available as a one-time purchase for 34,00€ here https://store.greyboxaudio.com

Build it: if you want to build the full plugin from scratch you can find the source code on my github https://github.com/greyboxaudio/SG-323

audiojunkie · Post by **audiojunkie** » Thu Feb 27, 2025 7:40 pm

This is so awesome!!! Thank you for supporting Linux! Does this plugin scale up for HiDPI resolutions? I see that the features mention a resizable GUI. Once again, thank you so much!! This is a wonderful release!!

Vortifex · Post by **Vortifex** » Thu Feb 27, 2025 7:57 pm

As the controls are disabled I'm not able to get a proper demo out of it. Can you say how long the maximum reverb time is on each room type? I don't see a manual to check for myself.

Greybox Audio · Post by **Greybox Audio** » Thu Feb 27, 2025 8:05 pm

Vortifex wrote: Thu Feb 27, 2025 7:57 pm As the controls are disabled I'm not able to get a proper demo out of it. Can you say how long the maximum reverb time is on each room type? I don't see a manual to check for myself.

The maximum decay time changes with each program. Plate1 (the shortest program) has up to 2.0 seconds and Canyon (the largest program) has up to 10 seconds. The demo is fixed at 70% decay time, with 0 pre-delay, fully open filters and 100% wet.

Greybox Audio · Post by **Greybox Audio** » Thu Feb 27, 2025 8:27 pm

audiojunkie wrote: Thu Feb 27, 2025 7:40 pm This is so awesome!!! Thank you for supporting Linux! Does this plugin scale up for HiDPI resolutions? I see that the features mention a resizable GUI. Once again, thank you so much!! This is a wonderful release!!

Thank you for your kind words

It works fine on my HiDPI laptop screen and the 150% scaling option should hopefully cover most cases. But if you encounter a scenario where even the 150% option is too small let me know

Vortifex · Post by **Vortifex** » Thu Feb 27, 2025 8:38 pm

krabbencutter wrote: Thu Feb 27, 2025 8:05 pm The maximum decay time changes with each program. Plate1 (the shortest program) has up to 2.0 seconds and Canyon (the largest program) has up to 10 seconds. The demo is fixed at 70% decay time, with 0 pre-delay, fully open filters and 100% wet.

Thanks

Sounds good to me btw, grats on the release.

Greybox Audio · Post by **Greybox Audio** » Sat Mar 08, 2025 8:50 am

Version 1.0.1 is out now and fixes an issue with larger buffersizes. I've also added a version for Windows on ARM, but since I can only use Windows on ARM in a VM for now this has not been tested in a DAW.

audiojunkie · Post by **audiojunkie** » Sat Mar 08, 2025 10:19 pm

I really like that you support different architectures and platforms! Thank you for that!

Greybox Audio · Post by **Greybox Audio** » Tue Apr 22, 2025 5:29 pm

The ARM version for Windows has now been tested in Reaper, Bitwig & Cubase/Nuendo with a Snapdragon X Plus CPU. There's also a demo available https://store.greyboxaudio.com/download ... rm64EC.zip

meloco_go · Post by **meloco_go** » Sat Apr 26, 2025 4:16 pm

The Plate 2 is sweet on drums!

seangm · Post by **seangm** » Sat Apr 26, 2025 4:24 pm

Are there any video or audio demos? I don't see anything on the site or on Youtube. Thanks.

Greybox Audio · Post by **Greybox Audio** » Sat May 03, 2025 5:49 am

seangm wrote: Sat Apr 26, 2025 4:24 pm Are there any video or audio demos? I don't see anything on the site or on Youtube. Thanks.

I have not published any demos myself (yet) but here's a nice video from Elektronick Musick

audiojunkie · Post by **audiojunkie** » Sat May 03, 2025 9:10 am

Is there any chance you can increase the fonts? They are really small (unreadable) on high resolution screens.

Greybox Audio · Post by **Greybox Audio** » Mon May 05, 2025 6:11 am

audiojunkie wrote: Sat May 03, 2025 9:10 am Is there any chance you can increase the fonts? They are really small (unreadable) on high resolution screens.

Which fonts in particular? If you click on the "100%" in the top left corner you can switch to a 150% UI scale and that will also increase the front size.

audiojunkie · Post by **audiojunkie** » Mon May 05, 2025 4:09 pm

krabbencutter wrote: Mon May 05, 2025 6:11 am
audiojunkie wrote: Sat May 03, 2025 9:10 am Is there any chance you can increase the fonts? They are really small (unreadable) on high resolution screens.
Which fonts in particular? If you click on the "100%" in the top left corner you can switch to a 150% UI scale and that will also increase the front size.

Nice! I wasn't aware of that! I'll try that and see how it goes. Thank you!

The first Ursa Major Stargate 323 reverb emulation is here!