![]() ![]() For this type of type of audio problem, start with an equalizer.) So that's sounding pretty good. (Woman speaking: Here's an example of bad audio hum. So that's 60, twice that's 120, twice that is 240, twice that is 480, and again narrow band and we'll notch that down. We might even want to go one more band higher. For this type of type of audio problem, start with an equalizer.) So as you can hear it, our EQ moves are being pretty effective. For this type of type of audio problem.) Now I will bypass it. So let's hear it with just these three bands in. So that's double that, and I will notch that down. So I am going to set the EQ to deal with that and go ahead and make the same types of settings and a low mid band here, and I am going to set this to 120 and I will notch that down and I will set this one to 240. So those are all different nodes along the frequency spectrum where this hum will repeat itself. So above 60 hertz we also have the doubling of that, which would be 120 hertz, and above that we are going to have 240 hertz. Well, that's because actually sounds like this are harmonic in nature. For this type of type of audio problem, start with an equalizer.) So it does sound better when the equalizer is in but you still heard the hum. Let's listen to it and this time I'll be bypassing the plug-in in and out. So at this point what I would do is I just back off the gain all the way down. So that gives us a pretty good idea that this is indeed a 60 cycle hum. For this type of type of audio problem, start with an equalizer.) So you might have heard as I sweep the frequency, as I left and went higher than 60 hertz, it didn't get as loud as when it was right at the center of 60 hertz and when it went below, it was also little quieter. Right now we're introducing higher gain at that frequency. So I am going to go ahead and play it back and I will be sweeping the frequency. So I can play back the audio and I can even sweep the frequency back and forth and here 60 hertz is really the center frequency of this noise problem. So just to hear, a lot of times what I do is I increase it and play back the audio and see if that's where the problem lies. So the Gain knob lets us actually increase the level at that frequency or decrease the level at that frequency of 60 hertz. So the higher the value, the narrower the notch is, which we'll see as we introduce the EQ with the Gain knob. So in this type of notching out EQ, we're going to want this Q to be a very high value. That has to do with how wide or narrow the band is. You can do this with the knob or you can just double-click in here, select it and type 60, Enter. And I am going to set the frequency to 60 hertz. ![]() I am going to change it to its parametric setting, which is this icon here. So actually the first place we're going to look is at 60 hertz in the Frequency Spectrum and that's usually where I start if I am not sure where the problem is. It's actually called 60 cycle hum and that gives us a pretty big clue of where to start putting our EQ notches at. So this type of hum is a very common type of hum that you will find in countries like the US who use electricity based on 60-hertz cycles. I am going to go in to the Real time plug-ins and choose the EQ 3 7-Band EQ that comes with Pro Tools. Equalizers are a good way to deal with this kind of problem because they are able to notch out any of the frequencies that are causing the problem, and since they are continuous we can use it throughout the course of the region. For this type of type of audio problem, start with an equalizer.) So as the voiceover artist suggests, we should start with an equalizer. Let's take a listen - (Woman speaking: Here's an example of bad audio hum. First region here is a pretty common hum scenario where we've got a tone going through an otherwise well recorded voiceover. These are harmonic tones that range anywhere across the frequency spectrum and they're continuous throughout. The first of these problems we'll deal with is hums, buzzes, and rumbles that might occur during your audio. In the next few movies we'll go over a workflow and some techniques for dealing with some of these common audio problems. Noisy tracks are one of the most common problems encountered in producing a video and a lot of the time it's the reason why someone came to you in the first place for audio help.
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