layout and construction for studio

Hi everyboda, my name is Simon. I'm from Germany near Munich. I have found a new room i can use for my studio. I need 2 rooms, vocal recording and mixing. I have read a lot in here, really awesome this forum. Now I need help from you, the experts. I have made a picture for my design like this black: complete room red: i can use green: my design for it oeange: door and window I want to build the vocal room like steve's vocal booth and the mixing room with 703 isolation between the walls. The walls don't touch the outer walls. Should I use wood for the studio walls? thx so much!

maybe something like this?

thx gullfo, looks great. I have tried google sketchup, but it is really not so easy. Inside the walls there should be 703 right? But what to put on it to close the wall? For the vocal room I need to build broadband absorber to get a dry sound, should I build it like the booth of steve? There are some wood blankets in it, what is it and what is it good for? Is it used as (mid)bass absorbtion to get mor into <500 HZ? I am deeply grateful for any advice! Thx a lot!

what were you thinking about doing for the ceiling? HVAC? what you need to do is build a room-within-a-room so that each room is isolated from each other and the surrounding space. you need to consider the ceiling - isolated by supporting on the inner isolation walls or suspended on an existing structure above. or maybe the ceiling is already suitable and you are OK with building up your isolation walls to it. 703 will be used for room treatment, not isolation. insulation does not isolate...

so you mean, if my room is really quiet, I do not need to do anything about it, except room treatment for the sound? But I should not have parallel walls, right? can I use a concrete wall and then do something like absorber and so on? Before I thought the wood walls are for room treatment too! :-)

the walls in the small studio design posted - if you look closely - the dividing wood walls are "inside-out", the drywall is on the cavity side between them - this is the isolation mass. you need to have some mass - air - mass between the rooms to get any isolation. this includes a wall to the interior side of the basement too. the exterior walls may already be suitable as part of the MAM (MSM) equation. then on the inside of the interior walls - rigid insulation (703 or equiv) and a variety of treatment options like slats, cloth coverings, etc.