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#242566 - 01/24/09 10:45 PM
Re: Another Audyessy question
[Re: PorterPlex]
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local
Registered: 02/16/04
Posts: 293
Loc: Charleston, SC
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I'll have to try it again tomorrow and compare the results. Any theories on why I'm getting the weird sub distance readings? I've done the sub crawl and the present position is the best of all possible options.
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I started out with nothing & I've still got most of it left M60 VP160 QS8 EP350 M22 VP100 Algonquins
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#242576 - 01/24/09 11:50 PM
Re: Another Audyessy question
[Re: PorterPlex]
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local
Registered: 05/05/08
Posts: 200
Loc: Mechanicsburg, PA, USA
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Hey Dave, none of your Home Theater website pictures are working, fyi.... Thanks. I am redoing my site and got really started deleting without thinking. They are working again.
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#242578 - 01/24/09 11:56 PM
Re: Another Audyessy question
[Re: Joe_in_SC]
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axiomite
Registered: 05/11/02
Posts: 9976
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Joe, as to difference in the level readings, as I've commented before, there's no good reason to believe that the SPL reading taken with a separate meter(and with human error in reading it possibly a factor)is more accurate(or as accurate)than the result from the Audyssey microphone and built-in meter.
Where the sub difference is shown as being significantly shorter than the actual distance, this would seem to indicate that a nearby reflection is affecting the result. If you had the microphone positioned clear of obstructions for the first central reading, maybe you should try another first reading from about 6-7' away from the sub even if not in the listening position , to see if a similar short measurement results.
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Enjoy the music, not the equipment.
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#242627 - 01/25/09 11:20 AM
Re: Another Audyessy question
[Re: dewd]
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shareholder in the making
Registered: 01/29/04
Posts: 13147
Loc: Iowa
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pictures are working again Dave, but it is VERY slowwwwww. Are you hosting your own website? I've got broadband and this is reminding me of the old dial-up days....
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M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700 M22-OWM22-VP100-Denon2805 Audio Nirvana
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#242628 - 01/25/09 11:32 AM
Re: Another Audyessy question
[Re: JohnK]
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local
Registered: 02/16/04
Posts: 293
Loc: Charleston, SC
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That's a good idea John. If I take just a first reading to verify the setup, will that give me the sub distance? Or will I have to go through the whole multi-position routine? My receiver needs a minimum of 3 readings before it will do the calculations.
I was trying to analyze this situation (the way we engineers tend to do), and it's probably not such a big deal as I'm making it out to be. After all, the distance setting is used to calculate a delay time in microseconds. It seems unlikely that a difference of a couple of thousandths of a seconds would even be noticeable, especially with a long low frequency wave.
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I started out with nothing & I've still got most of it left M60 VP160 QS8 EP350 M22 VP100 Algonquins
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#242631 - 01/25/09 11:41 AM
Re: Another Audyessy question
[Re: Joe_in_SC]
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shareholder in the making
Registered: 01/29/04
Posts: 13147
Loc: Iowa
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If your a member on the AVSforum, there is an Audyssey thread in the Audio Receivers/Amps section. Chris from Audyssey is a regular and maybe he could help answer these questions...
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M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700 M22-OWM22-VP100-Denon2805 Audio Nirvana
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#242734 - 01/25/09 10:18 PM
Re: Another Audyessy question
[Re: Joe_in_SC]
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axiomite
Registered: 05/11/02
Posts: 9976
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Joe, the first Audyssey reading(usually from the main listening position)is the one that sets the speaker levels, crossovers and distances; the remaining readings are for the purpose of room equalization adjustments. So, if you decide to try the first reading at different positions to check what the sub distance shows, use the least number of readings that give you a result for sub distance.
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Enjoy the music, not the equipment.
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#242798 - 01/26/09 09:37 AM
Re: Another Audyessy question
[Re: Joe_in_SC]
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connoisseur
Registered: 01/29/02
Posts: 3127
Loc: Toronto/New York/Dwight
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Hello Joe,
While we'd all like to believe that Audyssey's automatic calibration and EQ is an audio panacea, it isn't, and it's error prone. I suggest you use your Radio Shack Sound Pressure Meter and adjust the levels and distances manually. You can tweak the levels of your surround speakers, subwoofer and center channel by ear if necessary later on.
Leave Audyssey Equalization switched off. As you've discovered, with really linear speakers like Axioms, Audyssey may degrade sound quality.
Incidentally, it is pink noise (not white noise) that is used. Pink noise has equal energy per musical octave; white noise has equal energy per frequency, so it's heavily biased towards the upper midrange and high frequencies.
Regards,
Alan
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Alan Lofft, Axiom Resident Expert
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#242834 - 01/26/09 12:27 PM
Re: Another Audyessy question
[Re: alan]
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aficionado
Registered: 12/26/08
Posts: 505
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Edited by BoB/335 (01/26/09 12:30 PM)
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