BILL HOLLAND: Welcome back to Gearwire.Com. My name is Bill Holland, and we're looking at the Izotope RX once again. I have loaded here a clip from a children's 45 called "The Animal Square Dance" and we're going to look at how to use that to do a little denoising. I'm going to select the denoiser here, and I'm going -- See, it comes up right here. I'm going to grab my selection tool, probably just my time selection tool, not my time frequency tool, and I'm going to go to the beginning of this clip, bring up my waveform so I can see what's going on there, and start beginning.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

All right. I want to grab this noise. All you hear are clicks and pops there. You don't hear anyone talking or any music. Select that, zoom in on the selection, and we're going to hit train over here. Now, you see what's happened is it has taken that noise and it has created an algorithm from it. What it's going to do is use that to figure out, "Okay. We're in the recording. Am I seeing this exact frequency?" and it's going to pull it out. So, let's select the section of the actual recording and watch the magic happen.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

Okay, so I'm going to select this section of music here, and click preview.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

You'll notice its hard work.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

Now, if you want to see what the difference is, you can hit compare over here, and we can...

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

...hear the original audio...

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

...and now the settings.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

All right, but we probably want that to be a little bit better so we're going to take noise reduction up and turn the smoothing up as well and preview that.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

Notice though that the more noise you pull out, the more you get this processing sound as well, so you might want to take the smoothing down and see what happens.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

You're still getting a lot of that noise, so in this case we're going to take noise reduction down just a bit down to like 14.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

You can also store different algorithms in here. You can have an A and a B algorithm. So, let's retrain it real quick and then we'll go back and take a look at this with some spoken word.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

All right. Now, let's make sure my noise reduction is around 15. Hit preview.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

Now, remember too that the noise reduction is mainly focused on the noise floor. For pops and clicks, we also have the declicker, which I showed you in the previous video.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

So, concentrate more on getting the noise out there and save the pops and clicks for the actual declicker tool, and that'll save you a lot of time and a lot of trouble with distorted audio. If you really want to get into the advanced settings, you can set your threshold for tonal and broadband. You can set you reduction levels and also there's a musical noise suppressor and residual whitening control that you can use. But again, there are also presets for the denoiser. They only have two here though. I think you can load your own as well. They have the highest quality which has a slower processing speed and it reduces only tonal noise. Let's see what happens when we apply that.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

So, you'll hear there it's only effecting, again, tonal noise. We're not getting rid of any pops and clicks. However, you can do that by turning the noise reduction up a little bit more.

[BILL HOLLAND AUDITIONING PARTICULAR SECTIONS IN A TRACK USING IZOTOPE RX]

Now, for more detailed noise removal, I'm going to take a look in a little bit at the spectral repair tool, so stay tuned to Gearwire.Com. And in our fourth video on the Izotope RX, you will see me actually removing small chunks of audio, little pops, clicks, chair moves, and hiccups. For now though, I'm Bill Holland and this is Gearwire.Com.