Need help with attic Mixing room.

Hello Everybody ! I'm probably one of a few people from POLAND (if any :-/) Ok so here I am. Stuck with such horrible room :-/ This is the room that is the part of my flat made in the attic of an old building. It is going to be mixing room for me. I've already mixed few albums here but it's always a horror for me. Lot of running down 4 floors to my car to check if it's ok. I'm trying to figure out any concept. Isolation is not any concern as it is enough already for my and neighbours needs. I am still thinking if building anything inside is good ? Maybe only some panels in the corners ? The room has horrible design so my head is boiling from thinking about workarounds to make it better.

I decided to change design to more simple one. I'm gonna put insulation and hangers for low freq absorption at the front and at the back. The slat absorbers will be more to the front. Listening position will be around middle of them. Any ideas ?

Saw you other thread ... I think you may need to provide additional drawings ... especially the current floor plan, along with what you want to do. Very hard to see what you have now. Also ... if you can post pictures of the actual site, that can only help! :)

I've already mixed few albums here but it's always a horror for me. Lot of running down 4 floors to my car to check if it's ok.

This is key, and a necessary evil. It is usually referred to as "translation" of your mix. What you have to do is learn from this excercise! How are your mixes translating? Have they a tendency to be bass heavy? ...too tinny? ... muddy? This will tell you what problems need to be addressed in your room - this then will be your guide. Your overall goal will be to get the room sounding acceptable (to you) and then learning how your mixes must sound in this room so that they translate well outside of it - i.e. in other environments. Remember too that whenever you change the acoustics of the room, this excercise (checking in your car etc.) will have to be repeated.

Hi "Cybul", and Welcome! :)

The room has horrible design so my head is boiling from thinking about workarounds to make it better.

Part of the problem is the dimensions: the room is nearly square, in cross-section. It is 2.84 m long and 2.79 m high. Is there anything you could do to change that? Also, I would suggest replacing those slot walls with large absorbent panels. They are right at your first reflection points, so it is a bad idea to have hard, reflective surface there. Also, that is a very small room, so it will need a LOT of bass trapping, but you don't have enough wall space with those slot walls in there, so I would take them out completely, or at least make them a lot smaller. I would also suggest trying to use some of that space between where you have the front "wall" and the windows: you could build proper speaker soffits in there, but not very tall, so that they fit in that space, which would make the room longer. You could also use a lot of that space for bass trapping. How much of that is already built? And how is it built? The layers in your SketchUp file are all mixed up, and do not correspond to their names, so it is impossible to tell from that how things are built. For example, turning off the "cloth" layer actually turns of the slats! And turning off "speaker front" does nothing at all... My final suggestion would be to download the REW program, and use that to run an analysis of the room, then post the results here so we can see what is wrong, and make suggestions on how to fix it.

Listening position will be around middle of them.

That's a bad idea. The middle of the room is the worst possible location, since all the modes are either at peak or null in the middle. - Stuart -

Gentlemen thank you for your replies. I guess I wanted too much for too less time and money (300$). I finished the room before I managed to read ideas fortunately it's not that bad. I will need a LOT of bass trapping. Slats were situated a little at the back in opposite angle. I did super chunks in the corners and hangers all in the free space between the windows and a panels. And insulation at the back of panels and at the walls. That works quite well. I did REW measurement and will post them too. The biggest problem will be I guess killing those modes... After all I'm really happy with mid-high response and stereo field. I've run LEDR tests from D.CHESKY CD and it's ten times better than before. Thank you all for help. Here are some pictures of a situation now.