jonjames
Established Member
Those results are pretty good I think. I always get a dip between 70 and 80hz too with my bk sub. You could always try moving the sub slightly or use different mic positions see if that helps.
Cool, but of course that presumes you are using full frequency spectrum correction.
If using the 'MuleEQ Filter Freq Range' limiter employing the Schroeder method link and calculator ‘Schroeder Frequency’ , this then negates applied high end roll off.
Also by limiting the correction to the bass (500Hz and below) you don't use Mid Range Compensation (BBC dip). This is not required on good quality modern speakers and may have a detrimental effect as Audyssey applies it a set mid/high frequency crossover point which probably is not the same point as the individual speakers design. Eg; Audyssey applies the dip at the 2 kHz region where as the individual speakers crossover point may be 2.8 kHz.
Bottom line is, letting Audyssey do it's thing full tilt is perfect for the majority of users however the ability to tweak via the app allows us to get that bit more out of our kit!
I would ask these two questions;
Some time ago I put together a little 'how to guide' that worked for me and really got my set up singing. Needs a bit of an update but let me know if you'd would like me to revise it and post?
- Why does Audyssey (via the app) allow us to limit the correction to just the bass frequencies?
- Why does Audyssey (via the app) allow us to turn off 'mid range compensation'?
Has the app been updated so that the sub issue is now fixed ?, I’m asking because I like using the app on the iPad over the inbuilt audessy.
I doubt you can run the inbuilt then adjust using the app ?.
You can modify the curve for the sub so you do not get that drop-off between 30Hz and 20Hz if that is what you're referring to. I thought we'd had confirmation that no EQ was taking place under 20.
Thanks, to be honest I haven’t read all the thread, I just noticed an app update a few weeks ago and wondered if it was fixed.
So no eq takes place with just the app or both app and inbuilt Audessy ?.
To be honest I’m a bit clueless as to adjusting anything using the app, is there a dummies guide on what the various options do ?.
Great question! I've always used the default and not got too hung up on it. But it would be good to get it right.Regarding Schroeder, what value are people using for the reverb time as part of the calculation?
It defaults to 0.5s on the calculation site, but if you use this calculation site to determine the value it can change the overall result massively:
Reverberation Time
..but as part of that reverb calculation, you can enter the absorption coefficients (for my room it defaults to 0.3), which in turn massively affect the reverb value, so this seems to be the key value to get right as it flows through and massively affects the other calculations!
Found this which is a crude way of explaining how to calculate reverb timeGreat question! I've always used the default and not got too hung up on it. But it would be good to get it right.
Research required me thinks!
Interesting indeed my learned friend.It's interesting, as if you assume the default absorption coefficients (0.3 for my room), that results in a reverb of 0.280 which equates to Schroeder of 181Hz, whereas just leaving as default 0.5, that's a Schroeder of 242Hz which is a pretty decent difference.
I think the answer still remains whatever sounds best between around 200 and 500, but it's an interesting subject and once I've messed around with that range if my preference is at the lower end I might try dipping down as low as 180 to see if I can tell any difference...
I had an interesting experience with Audyssey over the weekend. I read it's better to turn the sub dial to about 11pm/12pm and have a lower sub level on the avr so thought I would try it.
Sub dial 11pm, Audyssey returned -10db, I increased the sub level via the Audio menu to -7db and there was hardly any bass at all.
I then turned the sub dial back to about 9pm, ran Audyssey and got -6db, I increased the sub level via the Audio menu to -3db (same increase as previous test) and it was back to how it was before, plenty of nice deep bass how it should sound.
I think this was why I wasn't impressed with the sub when I first got as I set the dial on the higher side. According to a youtube channel called subwoofer 101, this should sound better but was very much the opposite for me. Not sure how this can be as Audyssey adjusts the level of the sub accordingly depending on the sub dial position. The graph/curve was pretty much identical to each other so why this happens in a mystery to me.
That's a Big No No! You need to set your LPF of LFE (in the AVR) to 120Hz and the dial on your sub to Off or as high as it will go if off isn't an option.For reference - I have set the crossover point for the front 3 speakers at 80hz and have also set the LPF of the LFE channel at 80hz in an attempt to cascade the crossovers.
Your pretty much always going to have issues with cancellation when using a single sub. You could try moving it to minimise this but it's always going to be there to some extent. If your room is rectangular you could have a play with the room simulator in REW to see where the sub is likely to behave best.I added a BK monolith+ to my system this weekend and as a result, recalibrated settings. I am generally happy with the room correction results for the front 3 speakers, but there appears to be a large dip at 90hz with the results for sub. Is this normal or should I look to change things? I’ve have added some images below and would greatly welcome any input.
That's a Big No No! You need to set your LPF of LFE (in the AVR) to 120Hz and the dial on your sub to Off or as high as it will go if off isn't an option.
Your pretty much always going to have issues with cancellation when using a single sub. You could try moving it to minimise this but it's always going to be there to some extent. If your room is rectangular you could have a play with the room simulator in REW to see where the sub is likely to behave best.
I wouldn't worry too much about that notch just based on the graph as those aren't usually audible*, although its proximity to the crossover point is less than ideal and better placement could help there, as could experimenting with a higher crossover frequency.
*To show what i mean by not really audible: here's a post-Audyssey measurement of my sub showing a similar cancellation at 50Hz;
View attachment 1190682
And an approximation of how it should sound to human ears by using psychoacoustic smoothing;
View attachment 1190683
Hi,
I have taken the plunge and purchase the Audyssey App.
These are the results I got.
I have no clue as to what all this means.
Hopefully someone can guide me as to how this looks.
Thank you.
Alex.
Your sub rolls off early at about 50hz. I need to get an AVR with xt32, your lines are so much smoother.
You could remove mid range compensation see if you prefer it.