Instructor: Let's make our audio sound better
with two quick effects.
To really grasp this lesson, you have to understand
a little bit about frequencies or audio frequencies.
Everything you hear has a frequency.
Low sounds have low frequencies
and high sounds have high frequencies.
I don't really have a high voice though
so I can't really do that.
When you're shooting an interview
and you wanna get rid of some of that background noise,
an air conditioning in the background,
a car driving by, a plane flying by,
some wind that caught the microphone.
One way to improve that noise is by removing
some of the very high frequencies
and some of the low frequencies.
If you remove too much,
you're going to start removing our voice
which is more of a mid-range frequency.
But let's just dive in
and you'll kind of start to understand
when you start to play around with it yourself.
If you select a clip and you go to
your effects bin over here, not your effects controls,
but you effects bins, you'll see under audio effect
that there is a high pass and a low pass filter.
So let's take this high pass on.
And what happens when you do high pass,
is it's saying that I'm passing through
all of the frequencies above whatever amount you want.
So I'm just gonna close this volume so you can see
a little bit more up here on the left.
When we apply that high pass to this track clip,
you get this high pass effect and the cutoff is 1495 hertz.
That's really high.
So listen to it right now.
Only the high parts, the high frequencies,
are allowed to play.
If we drop this down to say 100,
it sounds a lot more natural
because it's allowing all of the hertz,
all of the frequencies above 100 to play through.
If we go to zero,
well it won't let me go to zero
because that's like if this effect wasn't even on here.
For most people, going up to 100 or even 150 or 200,
if someone has a high voice, is safe
because you're not getting rid of any of the frequencies
that are in their talking
but you're getting rid of any of
the background rumbles that you might hear.
The same thing goes for the low pass filter.
If we take this low pass filter,
it's allowing only the low sounds or the low frequencies
to play below this frequency.
So if it's at 1495 then it's pretty low.
So we have to take this up to say 5,000 or so.
And that sounds a little bit too low too
because he has kind of a deep voice.
I wanna have a little bit more of his higher frequencies.
But there are some of the background noise
that it does get rid of.
And you can really notice this if you put on the headphones,
play it really loud without these effects on it.
You could also click these bypass options right here.
Which is just a quick way to say to Premiere Pro,
I don't wanna hear this effect on,
I just want to compare it to before and after.
So if you wanna turn it off
or just test it without this effect,
you can just click that bypass right there.
So the general rule of thumb
is to quickly get rid of some of that background noise,
add the high pass and low pass filters,
and set the high pass to around 100
and the low pass to around 5,500.
And go up and down from there.
Just play around with it.
See what it sounds like.
Make sure you're not cutting out any of the frequencies
of the person's actual voice,
and not changing how they sound
but if you can, remove some of those high levels,
those high frequencies
that you might hear in the background.
Thanks for watching.
If you have any questions, let me know.
And we'll see you in another lesson.