Re: [Avid-L2] OT: Audio Question

I would propose, not with any youthful self-assurance or anything,
that roll off is not a law, but rather... a label for a function often
added to certain pieces of equipment. For example, a microphone,
might have a bass 'roll off' switch. In the wikipedia definition, it
explains that roll-off is in relation to filter circuits- one further
assumes that your test does not include such a filter.

Maybe.

gh
----------------------------------------------------
Greg Huson
Secret Headquarters, Inc
Post Production / Production
Culver City, CA
323 677 2092
323 677 2096 F
www.DigitalServiceStation.com
greg (at) SecretHQ.com
www.SecretHQ.com

On Apr 30, 2010, at 5:09 PM, Benjamin Hershleder wrote:

>
>
> OK... who wants to help a dumb old guy?
> Yes, that'd be me.
>
> So... I'm looking for an English translation of the definition below,
> as well as a method to demonstrate it.
>
> "Roll-Off:
> A decrease in audio gain in relation to octaves.
> For every octave decrease in frequency there is a difference of -12dB
> in audio gain."
>
> I thought I had deciphered this and did the following:
>
> 1- Created 2 pieces of tone. One was 300Hz and the other was 600Hz,
> both at -20dB.
> 2- I put a Pitch Shift plug-in on the 600Hz clip and lowered it 1
> octave (verified the shift through comparison).
> 3- Based on the definition above, my hypothesis was that the altered
> clip would now play back at -32dB. It didn't. It played back at -20dB.
>
> Any takers?
>
> TIA,
>
> B
>
> Benjamin Hershleder
> http://ContactBen.com
> http://Hershleder.com
>
> Wear It In Post!
> Fun T-shirts, mousepads & more
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>
> [Non-text portions of this message have been removed]
>
>
>

[Non-text portions of this message have been removed]

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