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Author Topic: Proper B Chain Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-21-2003 12:47 AM                     I have used the audio control rta's and you need to use the slow setting and set it in 2 db per division to start with aim the mic at the ceiling straight up also turn the sub amp off when doing the eq Also check the CE generator on the side of it is a slide switch marked red and pink make sure it was in the pink mode not red mode [ 02-21-2003, 12:10 PM: Message edited by: Gordon McLeod ]  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 02-21-2003 12:25 PM                     Gord, thanks for the tip. I will certainly try that next time. I find that if you use the slow setting (at 3dB) then the LEDs just don't move. I suppose that it could be an equipment failure but I doubt it since my unit is brand new and works fine in all other respects. I will try using slow and the 2dB/step setting. As for the A-C filter, you can probably get it through your equipment supplier. It is made by AudioControl and I think the product number is AC-10. (I'll verify that later.)  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 03-06-2003 12:34 AM                        Ok, this is getting a bit confusing. Dave is saying that the A curve was a big problem, which I assume is not a good thing. Yet the author of the article says "....it later became evident that the weighting curves chosen for SLM measurements at certain levels do not correlate very well to how we actually hear complex sounds. More recently it has been found that the A-weighting curve provides a realistic approximation of how we hear over a fairly wide range of sound level measurements." So will EQing with the A filter get the more accurate response? Frank  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 03-06-2003 07:26 AM                     No. Use the C filter. The filters are designed to offset the Equal Loudness Contours. Each contour applies to a specific range of loudness levels. Movie theaters are set to 85dB and that falls within the C range. Hence, the "C" in the expression: 85dBC.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-07-2003 07:33 PM                     Eq should be down with no weighting but a flat response the spl is measured as DBC weighting  |  IP: Logged

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