An old friend of mine wants me to re-do his recording studio. I design, he builds. Basically, what he has now are 2 nice sized rooms and one small control room. Concrete and blocks. First thing I've done is ask him for exact dimensions and construction materials, fixture locations, etc. Second thing is I've asked him what he "wants" to do with it. What kind of sound? Music styles? Just friends and buddies or some commercial low-cost work? Etc. I know there will be some heavy metal involved. Right now I'm doing research on various treatments. I plan to calculate the modes and resonances, etc, and make a PDF file with buildable plans for him. I'm in Tennessee, he's in Minnesota, so I can't go there to check it out. He will source materials locally himself. I plan to have him build some wheeled baffles as well to gain additional flexibility. I've also included Q+A for fine tuning the room after we finish construction. My strategy is this: Have him build and install treatments based on the math, and then have an extensive fine-tuning period where we dial it in to what he "likes". Almost anything would be an improvement over concrete walls and floors. This post here is just a solicitation for general advice. I'm not asking anyone to do my work for me. Just asking for general advice. Your thoughts? Thanks! -Johntodd PS. I read the "Read this first" sticky, but was unsure how to answer many of the questions. I'm sorry.