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Re: Editing Sound (can you recommend a beginners guide / introduction?)

Subject: Re: Editing Sound (can you recommend a beginners guide / introduction?)
From: Walter Knapp <>
Date: Wed, 01 Oct 2003 12:18:34 -0400
kontroletti1969 wrote:
> Hello everyone!
> I wondered whether anyone could recommend how I to get the best out 
> of your recording.  I have access to Cool Edit Pro and can transfer 
> the recordings via the HHB Portadisc.  So far I have managed to 
> transfer the audio and burn to a CD.  When I hear some of the 
> recordings posted here, I notice that they are so much louder and 
> crisper than mine.  I wondered whether I could improve the sound of 
> my recordings or wether the recordings are just not "improvable".  
> Nonetheless, I really would like to learn how to use Cool Edit Pro 
> and about sound recording and sound editing in general.  Your 
> recommendations are highly appreciated.
> Regards, 
> Lars

The sound you get is a result of the entire system. From the mic all the 
way through whatever sound processing you do. Start with the mic you are 
using. Is it a good mic with the sound style you want? And is it 
appropriate for the task at hand. Far too many try to record things too 
far away for the mic they are using. Check out how you are setting 
levels. For digital you want to make sure you don't clip, so have to 
always have a pad. I would say most of what you are hearing in other's 
recordings are a result of their use of the equipment they have rather 
than software manipulation. Nature recording has kind of a tradition of 
getting the recording in the field and not manipulating it.

Only once you have a recording that's as good as you can get do you get 
into filtering and so on. Most filtering will remove the crispness 
rather than improve it. In general filtering has to be applied lightly. 
If ambiance is desired very little filtering can be done without being 
noticeable. Much more severe filtering can be used, for instance, to 
bring out a individual call for ID.

I use macs and Peak and SparkXL, so can't give specific instructions for 
Cool Edit. In general you filter to remove parts of the frequency range 
containing unwanted sounds, or parts of the dynamic range (generally to 
remove some faint unwanted sound), or you may do removal and 
replacement, for instance by substituting a bit of quiet sound section 
for a spot where some unwanted call occurs. There are also noise filters 
that, by one method or another remove some of the underlying noise, they 
definitely cannot be applied very strongly. I find it's highly valuable 
to check the results by sonogram, where you can see what was removed. 
It's very easy to trim part of the call you want, a sonogram helps to 
avoid that. This is why I use SparkXL for most of my filtering, it's got 
the ability to set up the entire stack of filters and stick a sonogram 
in to check, and then adjust while playing and watching the sonogram.

I would say one of the first things to learn in software manipulation is 
interpreting sonograms. The math involved in sonograms does not give a 
perfect picture, and you need to learn to sort reality from artifact.

Loudness is not the kind of goal so many think it is. True 
representation of most ambiance and calls would not be all that loud. 
Definitely don't get into the kind of distorted dynamic range 
compression common in music. A sound compressor is generally the last 
tool to consider in nature recording, and is only extremely rarely 
needed, and then only sparingly.

Walt




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