The Logic Off Topic list

Hi ot-ers,

I seem to recall that the use of a graphic eq to deal with room 
resonances, esp. standing waves, was found wanting in the late 1970's. 
If you mix to a room with peaks and troughs which are compensated for 
with eq, is the resultant mix what you want it to be - and in another 
room (with an 'ideal' flat response) would it sound the same? My friend 
says it will, using simple logic (not the programme!). I have a 
sneaking feeling it won't though I am weakening in this opinion.

While I have your full attention     ;-)     I have a peak in my room 
around 90Hz - and a trough centered on about 130. The room is 
unfortunately not far off a cube. L and W are 9 feet, and the ceiling 
slopes from 8 foot to 7 foot 6. The walls are 4" deep stud partition 
with 2 x sheets of plasterboard + skim, filled with rockwool. Suspended 
timber floor. I have floor to ceiling screens I use in the studio when 
tracking; when not they fill the wall opposite the speakers - JBLs 
4031s. The speakers are fairly close to the wall / corners - and have 
to stay there.

Questions : would two triangular rockwool filled traps behind the 
speakers help? They could only be about 3 foot high, and approx. 1ft 6" 
x 1 ft 6" on the two smaller sides.

Or - should I try a 4" deep bass trap, filled with rockwool, and 7 foot 
long, 2 foot wide, fronted with 3/8th ply, sealed all round, and fixed 
to the ceiling above and between the speakers? Other than this being 
elsewhere on the ceiling I can't fix traps eslewhere.


Regards,
Mike.


from Mike Levon
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HOLYGROUND RECORDS
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