[Frameworks] Optical Sound - filter

[Jason Halprin]

Basically, an Academy pre-empahsis filter would just be applying an EQ setting to your sound file so that it would be designed to work in conjunction with a theater's standard EQ'ing. 

There was a standard "Academy Curve" that was utilized to try and create a standard for mono, and it was replaced with the use of an ISO X-Curve for stereo, which also had variances in the formula based on room size. Each of these rolls off the high and low ends of the spectrum, effectively accounting for the longer reverb of bass, and the hiss inherent in an optical soundtrack.

All of this is to say that it doesn't need to be expensive, and you could effectively copy the older Academy Curve for your mono soundtrack through the use of EQ that mimics its shape. Now, as for how good your file would sound once it becomes an optical soundtrack is a little more of an art than just applying a pre-set, but if there's not a wealth of subtlety in the shape of your sounds, or a lot of high end (over 4K) or low end (under 100hz), you should get acceptable results.

See here for a little history and explanation: THE X CURVE & Double-Head Screenings | Music of Sound
 
   THE X CURVE & Double-Head Screenings |...
The name sounds like some magic preset, and in a way it is, but I’m not sure if magic is quite the right description.   
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-Jason Halprin


On Friday, April 25, 2014 3:27 PM, Roger Wilson <rogerdwilson at sympatico.ca> wrote:
 
Hi again Jared,

Have a look at this link, it talks about prepping audio for 16mm mono track and creating optical tracks.

http://www.sfu.ca/~gotfrit/ZAP_Sept.3_99/f/fsnd_lect_16mm_mix.html






Roger D. Wilson
Film Scientist
613 324 - 7504
rogerdwilson at sympatico.ca
http://www.rogerdwilson.ca


Without failure you can never achieve success. I have based my process and my career as an experimental film artist on this statement; and I welcome it as it pushes me forward as an artist to try something different, something new. 



________________________________
From: jaredphutchinson at gmail.com
Date: Fri, 25 Apr 2014 14:35:21 -0500
To: frameworks at jonasmekasfilms.com
Subject: [Frameworks] Optical Sound - filter


Hello, all,
I am almost ready to send out for an optical track for my first sync-sound print. 
I gave a call to the lab which photographs for optical tracks and I was told that my sound needed to be treated with an academy pre-emphasis filter. I was wondering if this (possibly expensive?) stage is necessary for my film sound. The soundtrack to my short is pretty primitive-sounding and not reliant on great fidelity.
Thanks!
Jared
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