Originally Posted by ClemC
The problem really started about 6 months ago.Called Verizon, said try new box. Went from a 7100 to a 7200, to a 4100 Fios one box, new ONT, all new cabling, switched from Yamaha to Denon receiver, all with no joy. I've since found Verizon is using Dolby Volume processing on their signals and is converting all sources to Dolby 5.1 regardless of source. What I'm trying to do is apply a band-aid so I can at least enjoy what I am watching. That's why I tried the Multi Eq app and Ratbudyssey, to try to EQ the sound to get rid of some of the sibilance. Any ideas what I should do to achieve that?
Sibilance is a complicated problem. I've seen comments that it's related to issues in an area ranging from 4 kHz to 8 kHz or so, different frequencies depending on who was making the comment. They were all quite possibly correct, for their issue. Pinning down the frequency may not be easy but if you're only getting it with content from the Verizon box then fixing it with Audyssey is going to affect every other source you have and what makes it better for Verizon content may make it worse for other content. If Verizon is your most used source that may not be much of an issue for you but if you use other sources a lot more than you use Verizon and fixing the problem with Audyssey makes things worse for the other sources then you're just creating a different problem for yourself and it may annoy you a lot more. It's easy to make one Audyssey profile for Verizon and another for other sources if you're using the MultEQ app and you can swap between them depending on which source you're using but doing that is likely to get annoying very quickly.
Audyssey is intended to fix room problems, not problems with one specific source. If you're going to try using Audyssey to fix the problem then I think you're going to be doing a lot of experimenting because first you have to find an Audyssey adjustment that fixes the Verizon problem and then you're going to have to see how that works with other sources. If it makes things worse for other sources and creates a bigger problem then you're going to have to try and find an adjustment that minimises the issues for both Verizon and for the other sources. That may or may not be possible, and it may take a fair bit of trial and error. There's no guarantees that you'll find something that works or, if you can find something that works reasonably well with all sources including Verizon, that you can find it quickly and/or easily.
There are 3 things I'd try first, given the range of frequencies I've seen people say are associated with sibilance. Both use the MultEQ app. I can't help you with Ratbudyssey because I have no experience with it. Going from easiest to hardest, the things I'd try are:
1- This is the easy one. Turn Audyssey off and use the treble tone control, turning it down. See if you can solve the Verizon issue just doing that. If you can then you can use Audyssey with other sources and just do this with Verizon which is probably the simplest way of swapping between one thing for Verizon and something else for the other sources because you can do it without reloading Audyssey profiles. If your bass gets boomy or problematic with Audyssey off, try a small adjustment with the bass tone control.
2- A bit more work involved. Start with the standard Reference curve and eliminate the mid-range compensation dip. Don't touch anything else. The dip occurs between about 2 and 4 kHz and there's a rise in response around 4 kHz where the dip ends. It's possible that it's the rise in response there that's making things sound worse with Verizon. If removing that rise at 4 kHz after the dip makes the issue less noticeable it's possible that it won't make things too bad for the other sources. You can experiment with both variations of the Reference curve.
3 - More work again. Start with the Reference curve option with the steepest high frequency roll off and start tweaking it. You could try rolling it off faster but I'd probably commence with starting the roll off a little lower down in frequency before I started changing the rate of the roll off. I'd also eliminate the mid-range compensation dip in combination with this. If you start playing with this option you're probably looking at trial and error as you play with adjusting the start of the roll off and the slope of the roll off. Try small adjustments because the bigger the adjustment the more likely ii is that the result will be noticeably worse for other sources.
None of the above involve notches in the curve. If you're going to try notches then life will be a lot easier if you can pinpoint the frequency which is causing the problem because otherwise you're going to have to experiment to find the frequency and then experiment to find the appropriate notch parameters.
And like I said earlier, you may not be able to come up with a response curve that works well with all sources. Fixing the Verizon problem may make things worse for other sources because this is not the sort of problem Audyssey is intended to fix because it's a problem related to a specific source, not a room related problem affecting all sources.