Small house studio in Croatia

Greetings. I wish to build a small studio for my and several local bands but I have no idea how to soundproof room and remove unwanted noise like echo and reverb when one is playing. The plan is to make control room in the kitchen(2) and the recording room is in room(3) where the bands will play and record. The walls are full brick aprox. 30-40cm thick. The sealing is made of wood cause this house is aprox. 60-100 years old:) yaeh I know. I'm open to all ideas and thnx for help. The pictures can be found in Attachment

i guess it depends on how much isolation you need for your band. if you can level the floor with concrete and polish that, it may be inexpensive enough. the walls need treatment - bass traps and something to cut echos and reflections without making it dead. reduce the size of the window and still leave it large enough for light and egress. on the ceiling a few clouds. in the control room - bass trapping front and rear. side and overhead absorption on first reflection points.

Thanks for the reply, this looks nice. We need lots of isolation because we have lots of neighbors and play loud music. The problem with window is that we cant change the size of it because it is old house and it is in the old town plans and externally it has to be same as it was before 100 years. that is because some law in Croatia that protects original old buildings. for flour we decided to put wood and carpet over it for thermal isolation. what materials can we use for isolation and bass traps? what do you think about this "blue isolation on the pic". thanx

actually, the existing window would be the same outside, you're only building a wall inside to hold a stronger window to reduce the amount of sound escaping. the blue "isolation" looks like foam acoustic treatment and not sound isolation. sound isolation and sound treatment are too different things. if you increase sound isolation, chance are you need to increase treatments, or use some tactics to reduce the amount of treatments.

I guess that is not bad idea to build a window inside the window. Ok is there some calculations or something to make acoustic treatment or you just have experiment with sound to "make it sound better :)" for example to reduce amount of high frequency's. what would be the cheapest acoustic treatment material? the problem in Croatia is that we do not have lots of specialized shops with that kind materials so we must improvise a lot. The one idea was to make cubes of Styrofoam in different dimensions and glue them in the random way so we can get a random pattern, would that do the trick?

step one - isolate the space. step two - treat it. sometime you can get away with both at the same time but in this case, its probably simpler to build out the isolation first, do measurements using Room EQ Wizard, then add the treatments. in the case of the control room - you know you'll need lots of bass trapping, front, back, and probably top (to save space) and it should be broadband when possible. treatments in the live room should be broadband to avoid inconsistencies. for treatments - if you have access to rigid fiberglass/mineral wool then you can build some effective bass traps and absorbers fairly easily and should be in your budget. diffusion can be acheived in your live room by staggering the treatments on the wall and ceiling so you leave gaps between them, and on opposing walls. this stretches the "absorber budget" quite a bit. the styrofoam may be useful as a diffuser and if you have enough of it and its cheap, it can't hurt to try - with the caveat to be wary of fire hazards. there is a site which shows making a skyline diffuser from foam and it may be more efficient than random.