Audio Effects in Unity

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En provenance du cours de University of London

3D Models for Virtual Reality

107 notes

University of London

3D Models for Virtual Reality

107 notes

Cours 2 sur 5 dans Specialization Virtual Reality

This course will begin your journey to creating Virtual Reality experiences. A Virtual Reality experience is a new world that you step into and are entirely immersed in. Creating a VR experience means creating that world and all the objects in it. In this course you will learn the basics of 3D graphics: how we create objects and how to lay them out to create an environment. You will learn techniques like materials and texturing that make your objects appear realistic. You will also learn about audio techniques to ensure that your experiences sound great as well as looking great. In all of these topics we will pay attention to the particular requirements of Virtual Reality, including pitfalls and performance issues: making sure your environment runs fast enough in VR. You will learn all of this using the professional game and VR engine, Unity3D. Unity is one of the most used game engine and is a relatively easy, but fully featured, introduction to 3D development. The course will culminate in a project in which you will create your own VR scene. VR development is something you can only learn by doing it yourself, so working on your project will be the best way to learn.

À partir de la leçon

VR Audio

In this week you will learn about using sound in Virtual Reality and how you can use advanced 3D Audio techniques to enhance your experience.

Introduction to Audio in VR1:10

What is Sound?8:19

How Do Humans Perceive Sound?8:38

What is Digital Audio?8:30

How is Sound Useful?3:19

How Do We Use Sound in VR?6:04

General Guidance for Using Sound2:04

How Do We Use Filters in VR?3:08

Audio Formats, Sources and Listeners in Unity6:32

Audio Effects in Unity4:16

Unity Audio Clips and Files3:49

Audio Mixers in Unity7:35

Audio in Unity | Additional Resources1:56

Rencontrer les enseignants

Dr Sylvia Xueni Pan
Lecturer, Department of Computing
Goldsmiths, University of London
Dr Marco Gillies
Senior Lecturer
Computing Department, Goldsmiths, University of London

Another very important thing we can do with audio in Unity is we can apply audio effects.

We've already talked a little bit about these.

But here, we're going to show you in the screencast exactly how it works.

If I select my cube again,

which has the audio source on it,

as well as the audio source,

I can add audio effects.

So if I select a reverb filter,

and we can see it's a bunch of parameters,

but I'll keep the standard ones.

And if I play the audio through the reverb filter,

you can see it sounds different.

Then, if when I turn the audio filter off.

And I can add multiple filters,

for example, I could add an audio chorus filter and that will also change the sound.

You hear that sort of coming in and out of the sound.

We can add filters specifically to objects.

So an audio object can have a filter applied that can add delay or

reverb or pitch shift and there are lots of other standard effects,

including things like chorusing, flanging, and compression.

Now I can't really go into much detail about what these things do.

We don't really have the time for that.

You might want to experiment with them.

But more or less,

the most important things that you need to make a nice scene are delay,

reverb, pitch shift, and volume.

One of the ways you can use reverb in

a very creative way in Unity is to create something called a reverb zone.

Now a reverb zone is a great way of automatically adding a reverb effect to

a particular audio source or an object when it's in a particular part of the environment.

So let's say you've got a room and that room has a particular feel to it,

a particular reverb, you can add a reverb zone which covers that room.

Now if the player enters that room,

anything which is in that room,

either which is brought in by the player such as it's guns,

the player's guns or whatever,

or any sounds the player makes when they're in that room will have reverb on it.

Any sounds which are atmospheric,

which are being generated by objects that are

in that space will also be treated by reverb.

If any of those objects or if the player themselves moved out of the room,

then the reverb will slowly die away.

So when you leave that effect when you move of the zone the effect is removed.

This is a great way of controlling the ambience of spaces.

And it's a really useful feature in Unity.

So now I'm going to add a reverb zone to the scene.

So it's a particular place where reverb will be applied to all audio.

So I'm going to go and select gameobject audio and audio reverb zone.

So this creates a game objects,

but it's not a physical measure object,

it's just an empty game object.

And if the object is near the reverb zone,

it will have audio effects applied to it.

And you can see, it's got these two spheres

around it and these are the inner and outer reverb zone.

So we can adjust these in and out to change the size of

the reverb zone and how much it will affect the object.

And depending on whether the object is inside or outside of the reverb zone,

it will have a different sound.

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