Subject:REMOVING Echos

Posted by: UncleBruce

Date:5/3/2010 8:06:33 AM

I'm doing work with animal calls. They are recorded in two places - outdoors (i.e. no echos) and indoors (concrete walls, lots of echos).

I want to work on categorizing similar calls - but the concrete echos are so severe that I'm having problems. I need to be able to match up calls made outdoors with calls made in the concrete enclosures.

Is there a sound forge add-in that will allow me to detect and cancel (or at least reduce) the echos?

If not - where do I turn? I've found lots of stuff for telephony, but I don't think that applies - I need something to detect and suppress the echos long after the recordings are made.

Uncle Bruce

Subject:RE: REMOVING Echos

Reply by: musicvid10

Date:5/3/2010 8:45:06 AM

The only way to prevent echo is to reshoot in an acousitcally controlled environment.

There is no physical way to separate the echo from the prime audio -- once you've mixed a cake batter you can't pull the eggs out, it's that simple.

There is an old technique that I adapted to Sound Forge that will give a slight reduction of the effects of some kinds of echo -- my best advice is to use it sparingly.

http://www.sonycreativesoftware.com/forums/ShowMessage.asp?ForumID=3&MessageID=545526