Originally Posted by JRobinson84
Magnum, that's an interesting discovery. Thanks.
Could it be possible to duplicate the Audyssey filters and such by using the MultEQ app and then tweaking the curves in "Ratbuddyssey"? Even if you could, would enabling DynamicEq kill it again?
Possibly, but duplicating the filters seems like defeating the purpose of Audyssey to begin with in a way. Wouldn't it be better to use no filters (or just for bass/sub) than the "wrong" filters for some speakers?
DynamicEQ doesn't seem to hurt anything here. It's mostly for bass.
I'm not sure what in Audyssey changes/changed the phase here. My left side was still working without doing anything and the right side only needed a tiny change (0.1 feet in one speaker) to get it working again on the right side. All I can figure is the more correction, the more likely there is to be a possible issue. I'm also not certain if there's any difference between Dolby Pro Logic II and I in this regard. I'm using Pro Logic I. I don't know enough about its behavior, but it seems at least possible it could be more (or less?) tolerant of deviation than Pro Logic II for center extraction. I know Pro Logic II has additional options for center channel width and what not. But it seems like it should extract any in common in-phase information (which if you think about it should not be entirely identical in each channel contrary to this "dual mono" theory because otherwise there would be no content whatsoever left in the front/rear height channels if it were ALL identical. It extracts in common in-phase information and the more it starts to separate, the more is leaked to the front/rear (normally left/right) channels to the point where nothing is in common and it all goes to the respective front/back (left/right) channels. This is how you get nice and even panning between the left/center/right channels. If it's largely all or mostly being rejected, then there's little to nothing in common in-phase.
When the distance setting was off, I had top middle output with the test tone, but I had a LOT of output in the front/rear channels as well. When I moved the distance 0.1 feet, ~95-98% went to the top middle with only a tiny bit going to front/rear (not audible at MLP). I think
0.2 feet worked as well (I'd have to test it to be sure and see how far the range is), but at some point it got screwed up again the further the setting changed). So imagining two scopes with the aligning data, if you shift the entire sample in time to the left or right, it will start to have little to nothing in common and more and more will be rejected to the front/rear height speakers. Now imagining Audyssey changing frequency response curves (basically just levels at various frequencies), those changes might very well be rejected, but unless you have like a 10dB correction, you're unlikely to hear the rejected data at the front/rear speakers in an audible fashion and even then it would be over a very narrow bandwidth. I could imaging some weird sounds if there were huge swings there, but that's all theoretical.
I haven't noticed any problems so far with having Audyssey on. Turning on DynamicEQ doesn't seem to hurt it either. Everything is working well and my sound is pretty fantastic at this point (I don't say that lightly; I've been tinkering with placement, matrixed levels and room treatments for some time now and the final curves look pretty darn good. Top Middle doesn't get any EQ, but I haven't noticed any audible weirdness or changes in front/back pans through there (it was all pretty good sounding even without Audyssey; it just sounds a bit clearer in the vocals and a bit more even in the bass area now, which is mostly noticeable with familiar stereo albums played through the mains. I assume it's helping movies too, but that's harder to make comparisons when most of the correction in my room is fairly mild, especially out of the bass region.