Impulse Responses for post

[Alexander Lowe]

Could there be any advantage to capturing a reverb Impulse Response for the environment of a scene?

I wonder if post would be appreciative of this file to put into a convolution reverb to re-create the ambience in ADR.

I'm a playback op, and am looking at the scenario with a full PA in front of me, boom op ready to go, and given about 2 minutes, I can capture an impulse response using the boom mic as the reference source. Feed a sweep sine wave through the PB rig and record the response.

I understand most directors will have little patience for the sweep tone, but I've had some opportunities to capture them, and the UPM might see the benefit in having it.

Or could this be considered too petty for post to bother with?

[Richard Lightstone, CAS]

Hi Alex,

This topic was covered about a month ago and Altiverb has software to use the slate closure to create the right algorithm. Tony Johnson who is mixing The Hobbit was describing how he was providing a track of the "clap sticks" for the editors.

Here is the thread link:

[Alexander Lowe]

Hot Damn!! That video was great. Thank you Richard.

Makes me want to get Altiverb.

BTW, what OS add on/feature was being used? At 3:20 in the video, Tony was rehearsing/pulling sounds from a finder window. I've seen it before but can't remember the name.

Now how do I get production to let me get these IRs......

[Tony Johnson]

Hi Alexander - I believe the latest Altiverb is still in the Beta testing phase so I am not sure if it is commercially available ?

I have not had the results back re the " clap sticks" yet but what seems to be of use , and this kind of happened by accident , is that the claps are also on the Lav tracks . PJ would call the wild track on the end of the last take he was happy with and before the cameras cut (Red Epic fan noise if they cut) and all the actors stood still so I had atmos on all the isos and the clap as well . I will post when I get the feedback early in the New Year hopefully .

Tony Johnson

[Richard Lightstone, CAS]

Alex,

In the video demo, he's using Snapper. It's also software from Audio Ease. I have it and it was Jeff Wexler who first brought it to our attention, right here on jwsound!

It's a great utility and will open any audio file in any audio format. Check out the demo here:

http://www.audioease.com/video.php?play=1

[Alexander Lowe]

I've been using the Impulse Response Utility that came with Logic to create them. But that was at my studio and just empty rooms.

Snapper! Thanks Richard. I could really use that in the studio.

... and it comes with a 100 day demo. Nice!!

[Richard Lightstone, CAS]

I have Snapper on my Macbook, that's with me on the set and also on my Mac Mini on my cart. You never know when you have to preview a file or do a quick and painless edit.

By the way, thank you for the great job you did doing the playback on "Let It Shine", in Atlanta!

Happy New Year!

[AudioNinja]

I provide IR's for productions when they have a difficult reverberating location that there is alot of dialogue in. They seem to appreciate it.

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