EVP 102: Analyzing Your Recording – The Down And Dirty How To Guide

by Matt Shamblin

The first step in the process is to actually sit down with your studio quality headphones and listen through all of your audio recordings.

Make sure that you note the recording time for later analysis. Once you have gone through everything take your notes and go through each recording device and dump them to your computer, if you haven’t already done so. I’m not going to get into how to dump the audio here. You can either refer to your device’s manual or you can do a little research on the ole interweb and find that part out.

In this article, I’m primarily dealing with how to eliminate background noise in your possible evp recording. As stated in EVP 101, you will need some sort of audio editing application and in this case I’ll be using Adobe Audition to walk you through the process step by step. Just keep in mind that you will not be using the same settings that I’ll be using on your recoding because no two beasts are alike and you will have to modify for the background noise that you’re trying to eliminate. That said come inside the show’s about to start.

*If you would like to follow along CLICK HERE if you wish to download the original unmodified file.

Now that you’ve dumped the audio isolate the section that you want to work with. Keep a few seconds before and after what you think may be an EVP. If you’re using the example file this has already been done for you.

Let’s take a look at the waveform. You can’t really see much of anything going on here just by looking at it so play through it. Right around the 2 second mark is where this EVP is.

Go to effects, amplitude, amplify/fade. What we’re going to do is amplify the file. With linear editing applications always, always, always preview what you are about to do to your file before applying destructive effects (effects applied directly to the file itself as opposed to being in an “effects rack” which you can turn on and off particular effects anytime you wish). Anyway apply a 23 db boost to this file. All where doin here is giving ourselves a little more room to work with. It’s better the more data you have coming in but with EVP work your kinda stuck with what you get.

Since we have the file prepped to work with I’ll be showing you two ways to reduce background noise. One we’ll be using filters specifically designed to reduce background noise and a simple graphic equalizer. The second way being just using a simple graphic equalizer.

So lets get started with the noise reduction. Go to effects, noise reduction, noise reduction. What you’re going to do here is capture a profile. Basically it analyzes the recording for you and determines what to reduce. The default settings  are fine. Once that’s done you’ll see a funny wavy line. What it is that we’re going to play with is the noise reduction level. Hit the preview button, start low and work your way up until you’re satisfied. In my case I chose 40. Hit the bypass check box and listen to the original wave and make sure that you’re satisfied before you click ok. You can hear that the EVP voice has come out well.

I’m still not quite satisfied with it so lets keep going. Go to Filters, graphic eq. For simplicity sake use the 20 band EQ and select return all to zero. This effect also live updates just like the others so we can hear the changes we make before we actually apply it. This is really the same process that would be used for isolating the EVP voices without the noise reduction filter. As with any audio editing it’s preferable to cut frequencies than it is to add them. Key thing is to play with it until you get something you like. See the image below to get the settings I used.

Here’s the finished work.

Let’s say you didn’t have any noise reduction filter like that; what would you do? Any basic audio editng application will have a way to amplify the wave file and and EQ. Here’s the settings I used for a Graphic EQ alone to reduce the background noise.

Check it out now.

Like I said you will need to play with the settings for your own EVPs. At least here I’ve given you a starting point on how to do it.


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