【Lynda高精度字幕由CGSUB.COM独家发布】 Christine: Timing the cut to the music really enhance the pacing, but
carefully placing audio effects will take this spot to a whole new level.
In this movie I'll show you a few creative things you can do with sound.
Let's begin by laying in some footsteps leading up to the long jump.
I've selected a portion over here.
(SOUND)
You can hear that they're way too fast and it sounds like someone's jogging.
But watch this.
I'll lay this audio into the timeline, zoom in so you
can see what I'm doing, and I'll sync the first footstep.
Now first I'll increase the height of the track
just so you can really see that wave form.
Okay, there's the footstep, and there's the second footstep.
So what I'd like to do is time it so as I step through frame by frame I'm watching
his foot land on the ground. There it is.
That's right where it starts to touch.
And I'll just sync that very first footstep.
Doesn't have to be perfect.
Now, the second footstep is going to happen way too soon.
I'd like it to time up with the close up shot here.
So I'm zooming in, and here's what I'm going to do.
I'll grab the rate stretch tool.
Now, this is going to slow this shot way down.
And what I'm trying to do is get this
footstep wave form to land at the play head.
There we go.
Now when I play through
the timing will be right.
Nice, but you may have noticed because I
slowed the shot down the pitch has shifted.
If you want to preserve pitch at any point in time after doing the rate stretch,
I can right click the clip to speed
duration and ask Premier to maintain the audio pitch.
(SOUND).
I actually preferred it with the deeper sound
effect, so I'll undo and play that back.
(SOUND), great.
Later I'll add some filters and effects.
In addition to changing the speed to get the
sync to match and adjusting the pitch if need be.
Another great trick is to take a sound, in this case a woosh, and layer the
same effect repeatedly to give some complexity.
Now in this particular shot, I've got the hero.
The graphic shot with the H plus
fragments that come off and fly out of the frame.
I really want to create the sound of, well I thought
about breaking glass but then I decided I needed something edgier.
So I was trying to create the sound of electricity.
And this is just a simple woosh.
I'll load that up into the source monitor and play it for you.
(SOUND)
Okay.
So, I've created that, that's sort of a whoosh.
It's a hit with the trailing whoosh, and then I've actually grabbed some of these
(SOUND)
that mimicked the sound of electricity.
That problem is that I really want the waveform to trail off.
In other words, if you look at the
waveform, it builds and then drops off sharply.
What I'd really like it to do is
hit sharply and then drop off the other direction.
So I've layered these together.
And the first time I play them through you're going to
hear some repetition because they're the identical sound one after another.
(SOUND)
Voom, voom, voom.
So to correct this what I'll do is select
the shot, choose speed duration and press reverse speed.
And I'll do that for the first and the last.
Now what this has done is served to create this decay in the sound of the wave form.
(NOISE)
So that I've got complexity, but really I'm just using the
same sound effect and reversing the playback to create that decay.
I can even stretch that out a little bit under
the next shot, so that it doesn't feel so abrupt.
(NOISE)
Finally combining those techniques.
I'll come down to where the long-jumper lands in the sand pit.
And show you that, again, you really only need one simple whoosh effect.
I'll play through these and show you a trick I like to use.
I call it the half a whoosh.
So I'll play through the entire whoosh.
(SOUND)
And there's a hit there.
And I want to show you that if you park your play head in the center of the whoosh
and play it backwards, it sounds a lot closer to what real life is like.
There's the hit and then the decay or trailing off of the sound.
So a lot of times I'll use a portion of a sound effect,
layer them together and create a brand new effect from two different half whooshes.
So I've laid the first one in down here,
(SOUND)
and then I'll go grab half a whoosh and lay it down at the end.
(SOUND)
So that's what it's going to sound like backwards. Okay.
Dropping that in, and syncing it up to
where his hands hit the sand, here. And then reversing that shot.
(NOISE)
And I'll do something very similar for the sound of the sand flying
off of his feet. So I've taken the same whoosh and used
half of it at the beginning of the hit and half of it reversed at the end.
(SOUND).
Do what you can with what you've got.
If you layer and overlap sounds, you can create
a whole new effect from one single sound effect.
You can change the speed for some sounds to create sync.
And you can also preserve the pitch while doing that.
Some effects work really well in reverse.
Remember that you can build your own
effects by combining portions of two different sounds.
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