Before embarking on this journey some education is in order. Otherwise you will get so many conflicting ideas that you may end up more confused than when you asked this question. One of the best sources I have found is Acoustic Fields. They specialize in this very thing for recording studios audio listening rooms churches etc. They offer design work and have plans for DYI projects that you can build yourself. https://www.acousticfields.com/
Also check out Dennis's (the owner) video's where he will teach you all about room treatment. You really need to have a good understanding of what's involved and what it is you are really trying to achieve or you can waste lots of time and money.
https://www.acousticfields.com/videos/
Good luck!
Also check out Dennis's (the owner) video's where he will teach you all about room treatment. You really need to have a good understanding of what's involved and what it is you are really trying to achieve or you can waste lots of time and money.
https://www.acousticfields.com/videos/
Good luck!