1. Unfortunately Luminosus is no more maintained, see https://www.luminosus.org2. There is a new version of TouchOSC available, it is not really free for desktop versions (about € 18.- for desktop version € 11.- for iOS or iPadOS) but you can also work directly on a desktop and there are many improvement including LUA scripting support. https://hexler.net/touchosc?fscNext=fsc%3Ainvoke%3Acomplete
3. As an alternative there is a free desktop program called Open Stage Control https://openstagecontrol.ammd.net
Both have version for macOS, Linux and Windows, TouchOSC also for iOS, iPadOS and Android (Google and Amazon)
There is an updated version of Luminosus which works on macOS BigSur and Monterey here github.com/.../releases
The following version of s2l works also for macOS Monterey https://github.com/ETCLabs/Sound2Light/releases/tag/v0.0.2.1.0.9