"OFFICIAL" Pioneer MCACC thread - Page 190 - AVS Forum
Forum Jump: 
Thread Tools
post #5671 of 5672 Unread 12-19-2014, 03:07 PM
Arbalest's Avatar
Join Date: Jan 2006
Location: El Paso, TX
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Send a message via MSN to Arbalest
I am having an issue with my VSX-821-K... although there are a RCA subwoofer output and pre-outs for the surround back/front height, the MCACC does not pick them up during calibration; and the speakers are connected. I refuse to believe that ALL of the RCA outputs have been shorted, but right now the only sound I am picking up are the high level sound... in other words, all the connections that has a speaker wire connected to it; FL/FR/C/SL/SR.
Arbalest is offline  
Sponsored Links
post #5672 of 5672 Unread Today, 08:46 AM
Advanced Member
Sean_S's Avatar
Join Date: May 2000
Location: Columbia, MO
Posts: 746
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13
For those of you working with MCACC "Acoustic Calibration EQ Professional" and wanting to understand how to use the graphs to set the calibration time, I found this explanation in a manual for a European model that is a little more helpful that the same section in my SC-87 manual:

Acoustic Calibration EQ Professional
How to interpret the graphical output
The graph shows decibels on the vertical axis and time (in milliseconds) on the horizontal axis. A straight line indicates a flat-response room (no reverb), whereas a sloping line indicates the presence of reverberation when outputting test tones. The sloping line will eventually flatten out when the reverberant sound stabilizes (this usually takes about 100 ms or so). By analyzing the graph, you should be able to see how your room is responding to certain frequencies. Differences in channel level and speaker distance are taken into account automatically (compensation is provided for comparison purposes), and the frequency measurements can be examined both with and without the equalization performed by this receiver.

Setting Acoustic Calibration EQ Professional according to your room characteristics
Using the manual setup, you can set the time period at which the frequency response is analyzed, pinpointing the time that is best for system calibration with your particular room characteristics. The graph below shows the difference between conventional acoustic calibration and professional calibration (the gray circle indicates the point where the microphone captures sound during frequency analysis).

As soon as audio is output from your speaker system, it is influenced by room characteristics, such as walls, furniture, and the dimensions of the room. The sooner the frequency analysis, the less it is influenced by the room. We recommend an earlier time setting of 30~50ms to compensate for two major factors that will influence the sound of most rooms:
• Reverberance of high vs. low frequencies –
Depending on your room, you may find that lower frequencies seem overly reverberant compared to higher frequencies (i.e. your room sounds ‘boomy’). This may result in a skewed frequency analysis if the measurement is done too late.

• Reverb characteristics for different channels –
Reverb characteristics can be somewhat different for each channel. Since this difference increases as the sound is influenced by the various room characteristics, it is often better to capture a frequency analysis early on for smoother mixing of channel frequencies/sounds.

If your room isn’t affected by the factors above, it is often not necessary to make a 30~50ms setting. Later time settings may provide a more detailed sound experience with your speaker system. It is best to try and see what works best for your particular room. Note that changing the room (for example, moving furniture or paintings) will affect the calibration results. In such cases, you should recalibrate your system.
Sean_S is online now  
Reply Receivers, Amps, and Processors

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off