- [Presenter] Camtasia's noise removal effect
can do a really nice job
of removing unwanted consistent sounds
like air vents or computer fans.
However, sometimes it's tough for Camtasia
to know what is and is not noise.
And this can result in some wonky sounding vocals.
I'm going to show you an advanced noise removal technique
using Room Tone to remove just the noise
from your recording.
If you're not familiar with this term,
Room Tone is basically just the sound of your room.
Now of course, the best way to remove noise in my recording
is to remove the noise before hitting record
but sometimes things are out of my control.
For example, one time I did a video shoot
at a Votech school with a very noisy heating system.
And for some reason,
the maintenance guy wasn't willing to turn off the heat
to the whole school during the shoot.
So to handle this, I captured a room tone sample
of just that noisy air vent
that I could use in post-production.
Now to accomplish this, I just asked everyone to be quiet,
hit record for 30 to 60 seconds and stop.
Now, I have a nice clean sample of just the noise.
Before I go any further, I want to be clear here.
Camtasia isn't going to remove the sound
of my industrious chainsaw Willy neighbor
or my six-year-old pounding
across the floor above my studio.
However, for consistent sounds, it works really well.
Normally I take extreme measures
to create a quiet recording environment.
However, for demonstration purposes
these two clips include the lovely sound of my furnace.
So let's give that a listen.
In fact, I'm going to bump that up a bit so you can hear it.
(air whooshing)
Obviously would not want that in my recording.
Let's see what Camtasia can do to get rid of that sound.
I'm going to pop open audio effects, choose noise removal
and just drag and drop it to my room tone clip.
And with just the default settings,
let's see how that did.
Not too bad.
All right, so the next thing I want to do
is take this effect with the room tone sample
and paste it over here in my talking head clip.
Let's give that a listen before we add noise removal.
All right, so you have a few Camtasia projects.
Okay, so I want to remove just that noise from my clip.
So I'm going to right click this clip
that has the noise removal applied to it,
choose copy effects,
select my other clip and choose paste effects.
Now Camtasia should remove just that room tone
from my talking head clip.
Let's see how it did.
All right, so you have a few Camtasia projects
under your belt and you're looking
to bump up your skill set.
Not bad at all.
But I can do even more.
The first thing I'm going to try here is to bump up the amount.
Let's take it all the way up and see what happens.
Bump it all the way up to 48.
I'm Corbin, I've used Camtasia to help create thousands
of informational marketing.
Now I don't hear any noise at all
but I can still hear a little bit of change in my voice.
So I'm going to just back that off a bit,
let's say to 35 and one more time.
Instructional videos including this one.
That's pretty good.
Additionally, I can mess with the sensitivity here.
Let's pop that up to say 10.
I'm going to show you some of the technique
and I can hear a little bit of wonkiness,
so I'm just going to back that down to five.
That I use every day.
And in fact, that's really not doing anything.
Just leave it at zero.
You can take away the ideas that work--
Now your results of course are going to vary
from clip to clip.
You want to experiment until you get the most
out of the noise removal
without adversely affecting the vocals.
Now, if you don't have a room tone sample, all is not lost.
You can still of course apply the noise removal effect
and Camtasia will do its best to determine
what is and is not noise
using the gaps in the audio.
However, providing Camtasia with a room tone sample
will produce the best results when taking advantage
of the noise removal effect.