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So what would a "bad" impulse look like, would it simply decay slower? Or would it have muktiple peaks?
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You have a good noise floor at -75dbFS and not a lot of distortion with a smooth decay that isn't too long..
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I have no sub, these scans were just the two towers... hmmm. I wonder what they look like separately...
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Just be sure to have the receiver in stereo mode and don't turn on any soundfields or effects. I usually use both mains as you do...
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I thought it looked like it needed a lot of work below 100 Hz... and then again between 180-220Hz... I know you're better off not Eq'ing every little peak and dip, but what do we look for? when you say ~40Hz, I assume we're talking the same one that I meaure at 33Hz... we're not concerned with 68Hz, 77Hz, or 100Hz? Why? If htis is quite good, what does a mediocre one look like? How about a poort one?
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You have a 300ms scale and mostly the signal has dropped away by that time - that's good. Actually I like the horizontal scale to be set to LOG rather than LIN as it then matches the response and you can run the slider slices from 1 to 30 and see how the signal drops away on each slice. You can see likely the room mode ~35-40Hs area that is still ringing after 300ms - it's still around 60dB at that time, so it wouldn't hurt to eq or use placement to try and reduce it a bit. As you say, it wouldn't hurt to try and lower the peak at ~100Hz also...
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Reason I want to use the SPDIF out form the sound card is I use the SPDIF inputs on the AVR... Noone's figured out how to do a cal file yet? Noone's even faked one?
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Well, for the amount of time using REW, it's just easier and more accurate to simply hook up the system in analog.
brucek