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In Reply to: RE: A couple of comments… posted by David Aiken on December 13, 2007 at 23:50:33
David,
> If we treat the first reflections in a home listening room and, to take an extreme example, we actually absorb them sufficiently so that they become inaudible, we haven't eliminated 'first reflections", what we've done is to time shift them. <
First reflections are, by definition, those that arrive first. This is separate from whether they are early or not. Early is defined as 20 milliseconds or less. So reflections off a rear wall might be early but not necessarily first. It's a subtle distinction for sure, but it's a real distinction.
> Unless we reduce the room to anechoic chamber status which neither you nor I have ever recommended, there will be some audible reflections and the earliest of those to arrive become the 'first reflections' <
Well, okay, but still... :->)
> So we have 2 factors here that contribute to our perception of space. <
Yes, but in my opinion (uh oh) a room in a home should NOT be a part of that. Spaciousness and depth etc should already be embedded in the recording at the proper balance by the mix engineers. Then the job is reduced to ensuring that your own listening room doesn't muck that up. Which is ensured by having absorption at the first reflection points on the side walls and ceiling (and floor).
--Ethan
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