"Official" Audyssey thread (FAQ in post #1) - Page 1932

Quote:

Originally Posted by asere 

Quote:

Originally Posted by aliaskary77 

quick question before doing an audyssey calibration on a denon 1612 with polk 5.1 system.
I have read the FAQ few times but something still not clear to me.
When starting off, bass phase should be 0 degrees, volume about half way, and low pass (I assume is crossover) is set to max, which is 150 on my unit. (goes from 80 to 150)
I am then supposed to do the first position, then hit calculate. if need be, adjust volume and repeat to be within +-3db.
At no point does the faq talk about changing the low pass setting again. can anyone clarify if i should be doing something with that at any point please. The only thing i read is that you can raise it if i like, but not to lower it. Sounds like i am missing something in the middle.
Thanks.

That's right if you don't have a defeat switch on your sub set the low pass to the highest setting and always leave it there after calibration. That also applies to Audysssey once it is calibrated do not lower but you can raise. Of course in the end it is preference vs reference and how it sounds to you.

It's right to set the LPF on the sub to the highest setting (or to disable it if that is offered) but the advice to raise but not lower wrt to Audyssey is about the crossover in the AVR and has nothing to do with the physical controls on the sub. The controls on the sub should NOT be touched after running Audyssey (unless it is for the purpose of running Audyssey again with, for example, a higher or lower gain setting on the sub.

Quote:

Originally Posted by djbluemax1 

Quote:

Originally Posted by Holiday121 

Might be a silly question but u ordered a tripod with boom arm but the thread is about double the size if the bottom of the mic.
Is this usual and do I need another piece

Yes, you do. It's a separate adapter piece. I think Keith put it in the FAQ somewhere.


Max

I did - it's in here - referred to as the 'gadget you need'

d)1.   Do I really need to put the Audyssey mic on a tripod or stand?

Quote:

Originally Posted by aliaskary77 

Quote:

Originally Posted by batpig 

the FAQ doesn't talk about changing the low pass because you SHOULDN'T. Leave it max'd out -- the point is to get it out of the way because bass management is handled digitally in the processor (receiver).
The thing about raising but not lowering refers to the crossovers in the RECEIVER. That's the part you are missing

ah ok. thanks to both.

i didn't realize that the receiver could override the sub-woofer physical dial setting. so leave it at max permanently even after calibration and being used day to day. check!

It's not that it overrides it so much as you need to get it out of the way - if you have a crossover set on the sub and another in the AVR then they will not work together properly - you will in effect be using two crossovers. By defeating the XO on the sub (if it has a defeat switch) or raising it to the maximum you effectively bypass it altogether and this means you are setting the XO in the AVR, and just once.

Quote:

Originally Posted by aliaskary77 

This is the RM6750 5.1 set. The sub also says RM6750.

There is no LFE input. The only things are:

Input L and R. I connected to the receiver using L. Was told its digital and wont matter which you connect to and dont need both L and R inputs, just use either one.
Speaker inputs which are not used as they speakers are hooked up to the receiver.
Phase flip switch, 0 and 180. Set to 0.
Low pass 80 to 150, now set to 150.
Volume, currently set to middle.

I will probably try to calibrate tomorrow now as kids are home.

Thanks again for the help.

Yes, you have it!

Quote:

Originally Posted by sullivt5 

I posted this over in the Onkyo TX-NR818 thread and have not got a responce and thought I could get some help here.

Hi All ,

I have had my 818 for a little over a week and I need some help with my sub set up. I have a dual sub set up fed by a single amp that is all ultra 2 rated, with that being said the manual for the amp says that if I have a THX rated receiver that I need to turn the THX setting on the amp to yes this disables the gain control and boundry gain control on the amp and the receiver will control everything when I turn the U2 setting on for the sub control. The issue I am having when you run the Audyssey set up I cant set the db level for the subs because the gain control is disabled and after I run the set up my sub distance is .5 feet and have a -12.5 offset when they are about 13.5 away. If I shut the THX stuff off I get a distance of 24 feet and a -5.5 offset. I would just go with which one sounds better but I want to make sure my set up is right and I am not feeling it right now. Any ideas on how I can get it where it needs to be?

Thanks.

Odd. Audyssey usually ignores any settings in the AVR when it does its measurements. The result with the sub at 0.5 feet is clearly wrong, so there's no point pursuing that. I'd run it with the THX thing shut off on the amp and let Audyssey and the AVR take control. Distance of 24 feet and trim of -5.5 all sounds fine to me.

What is it you are not feeling?  The bass?  Check this out:

f)5.    Since I ran Audyssey everything sounds great - but where has my bass gone?

Quote:

Originally Posted by jdsmoothie 

@Keith,
I believe he's referring to the settings on the sub amp, not the AVR.


@sullivt5 -
Set the sub amp to THX OFF is the resolution.

Ah yes, I did realise that but still gave the usual advice that Audyssey ignores the settings in the AVR :)  True, but useless info in this case :)  I'll strike it through on my post.

Quote:

Originally Posted by IgorZep 

Searching for a reason of excessive brightness of Audyssey calibration did some measurements today. First I have discovered there is a bug in REW affecting my previous measurements, so if anyone looked at them - they are compete crap, forget about them.
Today I was able to only measure Front Left channel, had no time for others, but still some interesting results...
So. The picture number 1. REW sweep to HDMI in of Onkyo TX-NR818 in "Stereo" mode, taking signal from the speaker wires to the external ADC.
(REW is calibrated in advance with this loop as ADC have roll-offs at 20Hz and 20kHz by about 3dB). Audyssey mode is Movie.

The picture number 2 is the measurements done by Audyssey microphone of the same left front speaker but with my Dell Latitude E6500 mic. input (the external ADC didn't work with the mic.).
Three measurements - with the mic pointing vertically to ceiling at the height of tweeter and at the ear height (ears are above tweeters ~10cm, there is difference in responce, but not where I expected), also one measurement from the same position (arount 1m from speaker) with mic pointing directly to the tweeter, not the proper placement, but just in case, simply was interesting, what is the difference...

The speakers are MonitorAudio RX6.
Any thoughts...?

I use REW all the time to measure my audio response.  To be honest, I'm not following how you are taking your REW measurements, so it is difficult to interpret your graphs.   What do you mean, "...taking signal from the speaker wires to the external ADC"?  And are you using the Audyssey mic with REW?  This won't work very well, because there is no microphone calibration file for the Audyssey mic.

Here is the REW procedure I use.  Please tell me how your procedure is different.

- I connect a mic (EMM-6, with calibration file) to a mixer (Xenyx 502), which in turn feeds a USB external soundcard (SoundBlaster X-Fi), which is connected to a laptop running REW.

- I place the mic at ear level at the MLP, with the mic facing the ceiling.

- After calibrating the mic level, I run sweeps and generate response graphs.  A typical response graph (1/12 smoothing) looks like this:

Both your graph and my graph show the gentle high-frequency roll-off, which corresponds to the Audyssey target curve. BTW, forget the graph where the mic is pointed at the speaker--it is meaningless.  I don't see any indication why your speakers should sound excessively bright.

Your graph looks significantly different at the lower frequencies (partly because you use a different vertical scale).  Not sure why there are such large variances there.  Are you using a sub?