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Old November 13th, 2003, 12:10 PM   #1
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Removing Echo

Anyone have any suggestions on how to REMOVE echo using either Primeire Pro or Adobe Audition? I've got some editing to do on tape provided by a client that was made in a small room and has lots of echo. I'm looking for a way to cacel it out a bit.

Thanks
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Old November 24th, 2003, 06:48 AM   #2
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Have you looked through the filter lists? I don't have those
programs here so can't check it out myself.
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Old November 24th, 2003, 07:44 AM   #3
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Rob,

Yep, sure did. Lot's of ways to add echo but didn't see any to cancel it. Thanks though.
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Old November 24th, 2003, 03:03 PM   #4
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I was wondering the same thing, just with FCP??? Anyone know how to Remove echo instead of add it with FCP4?
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Old November 24th, 2003, 03:27 PM   #5
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I doubt there is any specific plugin that will remove echo. It is a very complex problem. I don't know if there are any tricks such as inverting the phase, reducing the inverted volume to the same as the first echo and sliding the audio down to the first echo. No idea if that works, but it might cancel out the following echos.
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Old November 24th, 2003, 11:15 PM   #6
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An expander might lessen the effect, but I don't think you'll be able to get rid of an echo.
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Old November 24th, 2003, 11:42 PM   #7
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I recently ran through the echo-removal gauntlet...painful, but at least partially possible. (I am currently running through the same gauntlet for a re-cut of the same material.)

Bias' Sound Soap did a pretty good job for me. I do, however, have two caveats.

1. My footage was close-miked with a Sennheiser MKH416 shotgun. This is an excellent mic that rejects a great deal of off-axis noise. So the raw sound track was relatively clean. I don't think results would have been nearly as good if I had used my ME-66.

2. Even with Sound Soap the process was hardly push-button. It took hours of experimentation to determine the settings that scrubbed most of the echo without flattening the resonance of the voices.

Good luck with your project.
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Old November 25th, 2003, 03:24 PM   #8
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Yep, that's the story in a nutshell...lots of ways to add echo but not to take it out. How much of a problem would it be to do a retake? ...or to "foley" in some new audio in post?
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Old November 25th, 2003, 04:09 PM   #9
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In this case, no chance for a retake or foley. It's an interview conducted by detectives of an individual accused of agrevated assult. Done in a small interview room, hard walls, ceiling and floor. I'm going to talk to them about improving the quality of recordings with better mic placement and hopefully some sound deadening.
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Old November 25th, 2003, 05:07 PM   #10
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This sounds like a great story.
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Old November 25th, 2003, 05:17 PM   #11
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It does, doesn't it? Like, "How do I keep the sound of a suspect's head hitting the mic from distorting?".
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Old November 25th, 2003, 05:42 PM   #12
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Well, there is some good stuff, but nothing compared to the latest Lady X (whew)
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Old November 25th, 2003, 05:52 PM   #13
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Yuh, that one's a little strong, eh? Gee, let's hope you didn't shoot anything like that in a U.S. police station!
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