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» Film-Tech Forum   » Operations   » Large Format Forum   » Imax "laser aligned" sound (Page 1)

 
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Author Topic: Imax "laser aligned" sound
Marco Giustini
Film God

Posts: 2536
From: Reading, UK
Registered: Nov 2007


 - posted 01-07-2010 05:24 PM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
On Imax website I read that Imax delivers "laser-aligned digital sound that envelops you".

What does it mean? Is it a Marketing nonsense or does it mean something?

Cheers

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Jonathan Althaus
Master Film Handler

Posts: 435
From: Bedford, TX
Registered: Dec 2008


 - posted 01-07-2010 06:45 PM      Profile for Jonathan Althaus   Email Jonathan Althaus   Send New Private Message       Edit/Delete Post 
Isn't all digital sound "laser aligned"? Sounds like marketing fluff to me.

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Adam Martin
I'm not even gonna point out the irony.

Posts: 3654
From: Dallas, TX
Registered: Nov 2000


 - posted 01-07-2010 09:47 PM      Profile for Adam Martin   Author's Homepage   Email Adam Martin       Edit/Delete Post 
A laser is attached to the speaker cabinet and used to aim the speaker at a specific spot in the auditorium.

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Chris Aulisio
Film Handler

Posts: 2
From: Mesa AZ
Registered: Nov 2009


 - posted 01-07-2010 10:25 PM      Profile for Chris Aulisio   Email Chris Aulisio   Send New Private Message       Edit/Delete Post 
The why does IMAX still use the Microphones to set sound??

Adam, if you still have my number from Century Days call me. I can not PM you, I'm too new

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Adam Martin
I'm not even gonna point out the irony.

Posts: 3654
From: Dallas, TX
Registered: Nov 2000


 - posted 01-07-2010 10:35 PM      Profile for Adam Martin   Author's Homepage   Email Adam Martin       Edit/Delete Post 
The laser is related to speaker coverage and the microphone is related to EQ.

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Bobby Henderson
"Ask me about Trajan."

Posts: 10679
From: Lawton, OK, USA
Registered: Apr 2001


 - posted 01-07-2010 11:00 PM      Profile for Bobby Henderson   Email Bobby Henderson   Send New Private Message       Edit/Delete Post 
"Laser aligned."

Yeah, when I play a CD in a CD player it plays "laser aligned" audio! Haw haw.
[Roll Eyes]

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Marco Giustini
Film God

Posts: 2536
From: Reading, UK
Registered: Nov 2007


 - posted 01-08-2010 06:02 AM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
I see. And does it make such a big difference to advertise it as the only feature about its sound system?

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Mark J. Marshall
Film God

Posts: 3184
From: New Castle, DE, USA
Registered: Aug 2002


 - posted 01-08-2010 06:31 AM      Profile for Mark J. Marshall     Send New Private Message       Edit/Delete Post 
Our engineer at AMC told me back in 1992 that the speakers in their large auditoriums were aligned using a laser.

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Gordon McLeod
Film God

Posts: 9444
From: Toronto Ontario Canada
Registered: Jun 99


 - posted 01-08-2010 09:18 AM      Profile for Gordon McLeod   Email Gordon McLeod   Send New Private Message       Edit/Delete Post 
For years we have used a laser that replaces the HF driver to aim horns in theatres

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Louis Bornwasser
Film God

Posts: 4427
From: prospect ky usa
Registered: Mar 2005


 - posted 01-08-2010 12:38 PM      Profile for Louis Bornwasser   Author's Homepage   Email Louis Bornwasser   Send New Private Message       Edit/Delete Post 
Funny! I use my EARS!

Everything else (mikes, EQ, multiplexers) is only used for confirmation. Ears first and last; instrumentation in the middle. Louis

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Mike Blakesley
Film God

Posts: 12399
From: Forsyth, Montana
Registered: Jun 99


 - posted 01-09-2010 09:21 AM      Profile for Mike Blakesley   Author's Homepage   Email Mike Blakesley   Send New Private Message       Edit/Delete Post 
"Laser" is like "digital;" it has a high-tech sound to it so people assume it means higher quality.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16116
From: Bountiful, Utah
Registered: Jun 99


 - posted 01-09-2010 11:21 AM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
I'm with Gord. I've had an adaptor that I use with my Alignotron and mount it to the back of the horns.

Louis.,.. you can't tell by ear where two feet above the rear center seat is at... What does it sound like at three feet and four feet above that same seat commpared to two feet ?

And what about the seats on each side... What does that sound like?

Mark

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Jake Spell
Master Film Handler

Posts: 294
From: Johns Island SC
Registered: May 2009


 - posted 01-09-2010 05:56 PM      Profile for Jake Spell   Email Jake Spell   Send New Private Message       Edit/Delete Post 
I agree with Louis, sound sytems need to pass the hearing test, they must SOUND good, not just look good on paper, well computer screen.

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Louis Bornwasser
Film God

Posts: 4427
From: prospect ky usa
Registered: Mar 2005


 - posted 01-09-2010 07:27 PM      Profile for Louis Bornwasser   Author's Homepage   Email Louis Bornwasser   Send New Private Message       Edit/Delete Post 
#1 I walk around to sample various areas.

#2 If I am trying to keep audio off the rear wall, I put the mike there and put the Abacus in the speaker loft with me. Aiming is easy.

At the National in Washington DC, it was necessary to stack 4675 horns on each channel. It was decided to cover the main floor with the lower horns and the 3 balconies with the upper horns. The point of interference was put on the front of the first balcony. Put a mike there, airm the lower horn, kill the audio to it and then aim the upper horn, then reconnect both. Job done! Louis

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Joe Redifer
You need a beating today

Posts: 12859
From: Denver, Colorado
Registered: May 99


 - posted 01-09-2010 07:33 PM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
Anyone who EQs by the numbers and walks away without listening to good known material is a poor sound technician.

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