Greybox Audio releases SG-323 Reverb Plug-In

[GreyboxAudio]

Even though I can't properly type anymore I'm happy to announce 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

SG-323 is available in CLAP & VST3 for Linux, Windows, macOS as well as AAX and AU.

Try it: a demo version can be downloaded here https://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€
https://store.greyboxaudio.com/products/sg-323-reverb

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

[tramp]

I download and build SG-323 from your github repository.
My system is debian/sid x86_64 with gcc 13.2
Beside some warnings about unused parameters and comparison from int to uint, it build fine.
I tested the vst3 version in carla, unfortunately it produce only silence.
The clap version works as expected, sounds really good. I like the plate reverbs.
The CPU usage is a bit high, takes around 12% here with a 128 frame buffer.

[LAM]

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

Built this plugin a couple of years ago, when the repo was https://github.com/ravettel/SG-323
Sounded very good but was very CPU hungry.
Eager to try this new version, thank you for keeping it open source.

[GreyboxAudio]

Hey, thank you both for your feedback!
The CPU usage can be on the higher side because I'm basically running a digital circuit simulation of the original hardware (although abstracted to a very high level). Make sure to build it with --config Release to benefit from all the compiler optimizations. The CPU usage of the debug build can be pretty excessive. On my Windows Laptop with an i5-1235U CPU it uses ₁% CPU in Reaper.

[tramp]

Reaper tend to use buffering (process plugins in background thread). To check the real CPU usage you must switch that of (in Options->preferences->Audio->buffering)
With buffering ON, I got as well lower than 1%, but with Off it's around 13%.
True, build with the --release flag.

[GreyboxAudio]

I've enabled the LV2 plugin target thanks to a pull request from https://github.com/dromer. LV2 will be "build it yourself" only because I assume the users that prefer LV2 over CLAP/VST3 should also be able to follow the build instructions.

[GreyboxAudio]

Version 1.0.1 is out now and fixes an issue with larger buffersizes.