Comments

musicvid10 wrote on 12/16/2011, 10:13 AM
This may be of some help. It won't eliminate echo, but will reduce the effects a bit.
http://www.sonycreativesoftware.com/forums/ShowMessage.asp?ForumID=3&MessageID=545526
Laurence wrote on 12/16/2011, 10:28 AM
The only thing I've seen that comes anywhere close to doing this is a little downward expansion, and that won't get rid of it, it will just lower it ever so slightly.
Dan Sherman wrote on 12/16/2011, 11:26 AM
Echo is echo.
Not much you can do in post.
On location, the solution is to get the mic as close to the sound source as possible.
The most expensive mic can't compensate for echo, but placement can help a LOT.
larry-peter wrote on 12/16/2011, 12:11 PM
I've used musicvid's technique to get rid of ambience on location dialog tracks and it works pretty well if you spend some time tweaking. A multi-band expander can help some too, but I don't think Sony's Multiband Dynamics will allow anything except compression.
Tim20 wrote on 12/16/2011, 12:53 PM
You can use the linked technique above which is in essence phase cancelling where you have two copies of the clip. One is the orignal source the other is compressed to bring up the noise floor (in this case the echo)and this audio clip is inverted to cancel out. If you get it right the voice will not be totally cancelled out, but the noise will.

Oh and mess with the compressor settings in real time and with headphones because external speakers will introduce their own phase cancelling.

From there you can you high pass and low pass eq to get rid of some more below a few hundred hz and above 8 khz. Another trick would be to sweep what is left with a very narrow band eq notch filter to see if you can rid of some natiness of whats left. Other than that it is what it is