The CEDIA Designer (formerly "the Cinema Designer") is a tool that helps you design home cinemas, and CEDIA members now have preferential access to this award-winning software. We speak with its creator, Guy Singleton, and Peter Aylett of Archimedia who's very familiar with TCD.

Here's more info on TCD:

https://cedia.net/insights/cedia-blog-detail/press-releases/2018/08/28/cedia-acquires-the-cinema-designer

Here's the site for the software:

https://thecediadesigner.org/