Hi Eyal, and Welcome!!!
:)
OK, firstly you are going to need lots of bass trapping in that room. Probably start with "superchunck" style traps at least in the front vertical corners, and perhaps also the front horizontal corner (wall/floor). You also need absorption on all your first reflection points, including a cloud roughly above your desk. You will probably also need something on the side walls to deal with flutter echo, if that is an issue.
- Eliminating the early reflections of the control room, by using acoustic boards on the right wall, left wall, right ceiling, left ceiling and using a carpet.
I'm not sure what you mean by "acoustic boards", but if you are talking about something like OC-703, then yes, that's the idea.
But forget the carpet: carpet is selective and unpredictable. It absorbs frequencies that most likely don't need absorbing (highs) and does not absorb frequencies that do need it (lows). Carpet does the
opposite of what you need! And it does it in unknown ways, since most manufacturers never test their carpet to see what the acoustic behavior is, and never publish data. So forget carpet. If you treat your room completely and then still have a problem with the room being too "live", THEN you could think about a large, thick throw-rug, or something like that. But that would be a last resort.
- Setting a proper balance for the control room.
What do you mean by "proper balance"? Are you talking about trying to use a graphic equalizer to tune the room? Forget that too: it is impossible to do, despite the marketing hype of some manufacturers. The problem is that an equalizer can only fix problems in the frequency domain, but most rooms don't HAVE many problems in the frequency domain! Most rooms have problems in the TIME domain, which equalization cannot do anything to fix. Yes, you can maybe use EQ to tame the response a bit for one specific location in the room, but in reality you are not fixing the room at all: you are disguising the problems, not making them go away. Equalizing a room like that is fine for just listening, such as a home theater, but NOT for a studio. You cannot fix time-related acoustic problems with EQ.
- Testing the new feeling of the recording room. Adding anything that is necessary for the feeling of the recording (diffusers/absorvers/bass traps).
I would take the other approach: First add the things that you will definitely need, which is bass traps and absorption on first reflection points, THEN test the room and see what else it needs. There's no doubt that it will need bass traps (lots of them, and large ones), and there's no doubt that it will need absorption on first reflection points. So do that, then see what else it needs.
Using the "dry side" for the control room and for dry recordings (using a portable acoustic screen).
Control rooms should not be "dry": they should be neutral, following the ITU and/or EBU recommendations for things like RT-60 times, response, geometry, volume, etc.
For your "portable acoustic screens", I'd suggest that you can build several gobo's on wheels, so you can move them around as needed.
In any evennt I'd start by measuring the current response of your room with REW (just so you have a baseline for later comparing), then put in the first set of treatment that you will need, and measure again. You can then see what areas improved, what areas did not, and decide on what additional treatment you need.
- Stuart -