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audience isolation from test screening

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len hugh
audience isolation from test screening
on Dec 9, 2009 at 9:41:14 pm

I am involved with audience screen tests for movies and want to isolate the audience laughter from the cinema room after recording the cinema room as we screened it. Is there any software that could extract the background audio of the film being played in the cinema and leave the laughter. I have the audio of the film clean and wondered if this could be used by a piece of software to extract everything from the recorded audio track that is similar to the films audio, there by leaving only laughter?


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Ty Ford
Re: audience isolation from test screening
on Dec 9, 2009 at 10:25:28 pm

Hello Len and welcome to the Cow Audio Forum.

In theory and on CSI, yes. In practice, not so much.

Regards,

Ty Ford

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide






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Jordan Wolf
Re: audience isolation from test screening
on Dec 10, 2009 at 6:21:45 am

Why don't you try a little experiment:

Step 1: Record audience watching film.
Step 2: Import audio into desired DAW.
Step 3: Flip the "phase" of the original film audio.
Step 4: Line up flipped-phase original audio with recorded audio from movie screening.

Results: Well, they might not be what you're looing for, but there will be a bit of cancellation of the original movie audio. Tis is primarily because of the boundaries in the recording space (the screening theater) and the reflections that cause the same sound to arrive at different times, thus causing comb-filtering and the like.

Try it out and listen to the results - at the least, it would be a learning experience.

Wolf
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len hugh
Re: audience isolation from test screening
on Dec 13, 2009 at 3:44:40 am

Thanks a bunch, interesting idea.
I will have a go and let you know if you like.
I am on Avid and I dont know if it has the ability to shift phase but I will check.
If it does not do you know of any free apps that might do this?
cheers


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