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sepp · Posted - Thu Aug 07, 2003 2:12 pm

I want to use noise reduction on a couple of wave files. Neither noise reduction itself nor creating a preset for batch conversion is a problem but I didn't manage to create the combination of both: a working noise reduction preset. If I run it on a couple of files it stops at the first file and doesn't do anything.

If I use noise reduction for a single file and do all the steps manually I start with highlighting a portion of the wave that contains only noise and I think I haven't understood how that is done when I want to automate the process.
I think the best method to get a profile of unwanted noise should be to use that first option that says (can't remember it precisely) "load noise preset" or "load noise sample". But that requires a file in an format that I am not familiar with. So I am a little confused here.
Perhaps someone could help me here. If someone thinks I should first try to be more precise, check the real names for the menues I mentioned and then write again, then that is okay as well.

Graeme · Member Location: Spain

NR is such a finicky thing, I don't think I would even contemplate doing it on a batch basis. What's right for file A, will not be for file B.

I'm not a great user of scripting, but I think I'm right in saying the real problem is that you can't acquire separate 'profiles' for each file you want to process. Of course, another point is how would the script know where to look for the right area from which to extract the profile?

This leads to having to use the same profile for each file - which neatly brings me back to where I came in Smile

sepp · Posted - Thu Aug 07, 2003 3:57 pm

>This leads to having to use the same profile for each file

If someone could tell me how it's done with the above restriction (the same profile for each file) I would have the perfect answer for my question because I would only use the batch conversion on files that were recorded with the exactly the same settings.

Pro_Support · Posted - Thu Aug 07, 2003 3:59 pm

Yes, to do Noise Reduction in scripts, you need to have saved a noise profile. And this means that the same noise profile will be used for each file. There is no way to tell CEP to get a new profile for every file, short of doing the whole thing manually. So, if the noise is the same in all of your files, then this might be something to consider. If the noise is different, then I'd say to forget it.

If you want to learn more about it, do a search for "younglove". He posted an example on running Noise Reduction in scripts.

Pro_Support · Posted - Thu Aug 07, 2003 4:04 pm

Here's one:

'Younglove's Decrackle Technique'

Graeme · Member Location: Spain

sepp · Posted - Fri Aug 08, 2003 7:15 am

alofoz · Location: Australia

Well, I think the real answer to your problem is some method of boosting your signal before the sound card, such as a good pre-amp.

Graeme · Member Location: Spain

You really are tackling this problem from the wrong direction. I suggest a small mixer would be a good investment (say, a Folio Notepad). This would allow you to increase the recording levels to something sensible and increase the resulting signal/noise ratio.

It's obvious that your soundcard is probably not of the best either, else there wouldn't be so much noise to start with, but until you can get some decent levels, it's not worth worrying about this aspect.