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Acoustics for production
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| Mark Iliffe |
Ok, ive had logic now for just over a year and im slowly getting to grips with things. My eqing etc is getting better but i seem to have an acoustic problem as the room my stuff is in is roughly 8ft by 6ft, yes small! Now ive been trawling the web for help with what to do and have found out that my speakers shouldnt be right in the corner of the room and must leave 30 - 40cm away from the corner. I am also under the impression it may be very worth my while getting some bass traps for the corners of the room as it tends to collect there. Also ive been told to get a few acoustic tiles above my head (on ceiling) and some either side on the wall of my head and behind me, Although im unsure what this will do and what brands to go for or all that stuff? will it be worth getting the stuff on the cheap to start with and see how it goes then maybe upgrade later?
Any help or recommendations will be appriciated?? |
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| echosystm |
Don't buy premade products, theyre pretty useless for the price you have to pay. A $75 home made bass trap will out-perform $200 (or more) foam trap kits. Also, buying now and "upgrading" later is stupid, you'll just waste money. Wait until you can afford to do it properly. Also... don't order stuff from foambymail or other dodgy retailers... the foam isn't meant for accoustic treatment (wrong pore cell counts/densities etc.). If you're going to by foam products (which I highly do NOT recommend), stick to Auralex etc.
Moving along... In a room that size, don't waste time with difussion; you just want absorbtion. In order of necessity:
1. bass traps in rear corners
2. absorption either side of the listening position (to catch early reflections)
3. absorption on the rear wall
4. bass traps in the front corners
5. absorption behind your speakers
How high is your roof? Do you have carpet on the floor? A general rule of thumb is to keep either the floor or the roof "live", so many studios do not treat the roofs unless they are very low and cause early reflections.
The best way to do all this? Build some square frames (a box with the front and back missing) out of mdf or particleboard and put some slabs of 50-90kg m^3 fibreglass/rockwool in there (roughly 4" thick). The higher densitiy, the more bass will be absorbed, but cost will be higher. Then wrap the whole thing up in hessian or some other material and staple it down. Done! |
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| echosystm |
BTW... obvioulsy you use the higher density stuff for bass trapping and the lower density stuff everywhere else.
Speaker positioning is also important. You need to have AT LEAST 80cm between your speakers, and you must sit at least 80cm from them. The distance between the speakers, ideally, should be very close to the distance that you sit from them. Ie. if they are 1.2m apart, you should sit around 1.1m to 1.3m from them. Angle your speakers such that if you drew an imaginary line, they would cross over about 10cm infront of the furthers forward point you sit (leaning on your desk or whatever). If that isn't ideal, you need to have them crossing over 10cm BEHIND the furthest point you would sit. If you sit directly on the crossover point you get all kinds of weird things going on in the stereo field. |
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