Author Topic: Before you post, this thread might help answer some of your questions in HT  (Read 110817 times)


Offline petetherock

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Please post instead of sending a pm, so more can learn.

My gear:
http://peteswrite.blogspot.com/2019/04/my-setup-42019.html

Offline petetherock

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Got this off AVS, very useful for those going into REW:
https://www.avsforum.com/forum/90-receivers-amps-processors/1574386-official-dolby-atmos-thread-home-theater-version-1816.html#post58074700

Calibration Software (YPAO/Audyssey/MCACC etc.)
measures the time it takes for sound signals to travel from the processor, to the speakers, then the sound waves to the mic.

The sub signal also has to pass through the amplifier/processor before sending a rather long Low Frequency wave to the mic.
The distance of your powered subwoofer may have been identified by your automatic setup as being further away than it physically is.
This is to compensate for phase matching with your other speakers. Even if the physical distance is closer than the setup microphone identified,
it is not advisable to change the subwoofer distance unless something really doesn’t sound right.

There are also a number of factors and room/furniture influences that will affect the time it takes for those sound waves to reach your MLP.

The "Distance" number is just a reference and should not be used to measure any physical locations of speakers or subs in your room.
What the software is actually doing is measuring delay for how long a sound signal takes to reach your mic, and subsequently your "ears"

Adding More Distance will apply less Delay to the Signal, Reducing the Distance will apply More Delay to the Signal.



==============================================

I will often use an SPL meter to level match all my speakers output (after YPAO), but I never adjust the speaker/sub distance numbers.
I also prefer to run my Subs 8 to 10dB Hot because a *House Curve helps LFE signals "sound" flat, as opposed to just "measuring" flat.

If you want to get serious about Sub Calibration, get Room EQ Wizard (REW) a free download
and a calibrated USB mic like a UMIK-1 that can actually measure down to 10Hz (YPAO mic is limited to 31Hz)


*What is a House Curve? : https://www.hometheatershack.com/forums/rew-forum/96-house-curve-what-why-you-need-how-do.html

Getting Started with REW: A Step-by-Step Guide
https://www.avsforum.com/forum/91-audio-theory-setup-chat/1449924-simplified-rew-setup-use-usb-mic-hdmi-connection-including-measurement-techniques-how-interpret-graphs-10.html#post22823228

REW Download site
https://www.roomeqwizard.com/

REW users Forum
https://www.hometheatershack.com/forums/rew-forum/

From the miniDSP website: miniDSP UMIK-1

The UMIK-1 mic must be calibrated with download file available on miniDSP site after you enter your serial number
(You need to use the 90º Calibration file to use your UMIK-1 in the upright (aimed at the ceiling) position (recommended for multi-channel and sub calibration)

UMIK-1 Calibration File load through REW, and make your first REW Sweep
https://www.minidsp.com/applications/acoustic-measurements/umik-1-setup-with-rew

$20 Boom Mic Tripod stand from amazon https://www.amazon.com/Microphone-Ohuhu-Holders-Adjustable-Collapsible/dp/B00OZ9C9LK/ref=sr_1_13?ie=UTF8&qid=1533906758&sr=8-13&keywords=boom+mic+stand
Please post instead of sending a pm, so more can learn.

My gear:
http://peteswrite.blogspot.com/2019/04/my-setup-42019.html