Hi,
After a lot of trial and error and applying absorption panels at some reflection points, I have a listening position I like. Since my room forces me to make some compromises (better clarity for less bass, for example), I was hoping a few signal adjustments (EQ/phase/others?) could help offset some of these compromises. Is there a rough procedure I can follow to start doing this?
I've read enough to know that EQ by itself can make problems worse so you should only apply it over frequency ranges with minimal phase. However, like many home audio issues, the information you need to do this appears to be scattered across several references which makes it hard for a beginner like me to know where to start. I am having trouble getting a sense of what minimal phase looks like, how one identifies it, and more generally, what an acceptable phase response would look like, and how deviations from this affect sound quality. Since I imagine the same is true for others, I don't mind writing up some sort of how-to for folks in my position.
As a start, here's my left speaker response from the listening position. (Note that for simplicity, I am using my listening position in this post, but I have also measurements for multiple locations I could average so that my adjustments aren't specific to one point only.)
REW allows you to create an excess phase measurement which produces this:
Does this mean I have no regions of minimal phase since it's zero on any region, or are there regions (excess phase is flat or linear?) where I am ok to apply EQ filters generated by REW? For regions where it is not ok to apply EQ, can I use something like minimal phase EQ filters in Rephase, and if so, any pointers on how to incorporate Rephase? Finally, should I look to make any phase adjustments before/after any EQ?
Thanks for any help or thoughts you may have.
After a lot of trial and error and applying absorption panels at some reflection points, I have a listening position I like. Since my room forces me to make some compromises (better clarity for less bass, for example), I was hoping a few signal adjustments (EQ/phase/others?) could help offset some of these compromises. Is there a rough procedure I can follow to start doing this?
I've read enough to know that EQ by itself can make problems worse so you should only apply it over frequency ranges with minimal phase. However, like many home audio issues, the information you need to do this appears to be scattered across several references which makes it hard for a beginner like me to know where to start. I am having trouble getting a sense of what minimal phase looks like, how one identifies it, and more generally, what an acceptable phase response would look like, and how deviations from this affect sound quality. Since I imagine the same is true for others, I don't mind writing up some sort of how-to for folks in my position.
As a start, here's my left speaker response from the listening position. (Note that for simplicity, I am using my listening position in this post, but I have also measurements for multiple locations I could average so that my adjustments aren't specific to one point only.)
REW allows you to create an excess phase measurement which produces this:
Does this mean I have no regions of minimal phase since it's zero on any region, or are there regions (excess phase is flat or linear?) where I am ok to apply EQ filters generated by REW? For regions where it is not ok to apply EQ, can I use something like minimal phase EQ filters in Rephase, and if so, any pointers on how to incorporate Rephase? Finally, should I look to make any phase adjustments before/after any EQ?
Thanks for any help or thoughts you may have.