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‫Hello.

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‫Welcome.

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‫In this lecture, we are going to be making sounds.

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‫So we'll have a muzzle sound and we'll have an impact sound.

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‫Let's dive in and see how we're going to do that in the process.

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‫We're going to learn how we can attach sounds to other components so they move with them, such as the

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‫muzzle.

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‫So now that we've got a nice and tidy pull trigger function, it's quite clear where we want to be making

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‫sound effects.

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‫Now in my game, the only real sound effects I want are on the muzzle flash and on basically the impact.

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‫So the places where we're already spawning emitters, I just want to add sound to that.

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‫Now that's relatively straightforward.

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‫We've done similar things in the past with the gameplay static, so you can do a play sound at location,

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‫which is going to play that sound unattached to any object.

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‫So it won't be moving around.

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‫It will just stay fixed in that location until it's finished.

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‫However, we also want to be able to play and attach sound in the same way as we're playing an attached

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‫emitter up at the top.

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‫And for that, that's fairly straightforward.

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‫What we're going to look for, though, is, first of all, we're passing in this type and let's try

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‫and understand that a little bit better.

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‫So we've got the play sound at location, which takes in the world context, but it also takes in this

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‫you sound base.

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‫Now why is it a sound base and not just a sound wave?

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‫Because if we go over into unreal, go into our asset packs, shoot a game, sound's weapon, assault

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‫rifle and mono, you're going to see that if we hover over any of these clips, then the type here is

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‫sound wave.

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‫And that actually corresponds to a type and unreal called you sound wave.

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‫And if we go and have a look at that sound wave class, you can see that it inherits from you sound

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‫base.

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‫So what is sound base?

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‫What else inherits from it?

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‫Well, something called an audio cue or sound cue, which we're going to be using in the next lecture,

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‫which allows us to do more complicated things with sound waves, such as randomize them and modulate

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‫their pitch.

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‫So we're not interested in those just yet, but just know that these functions will work just as well.

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‫Whether we're passing in a single sound wave or a collection of sound waves gathered together in a sound

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‫cue.

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‫And that's by virtue of the fact that they take in a sound base which encompasses both of those types.

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‫So what's useful is if we go and look through our gameplay statics for the use of sound base, what

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‫else can we play a sound with?

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‫Well, here there's a spawn sound at location, a slightly different variation on the previous function.

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‫You can see here it returns the audio component that it's spawned.

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‫We're not interested in that one though.

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‫What we are interested in is our spawn sound attached.

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‫Now this takes in our sound and then it also takes in a component that we want to attach it to as well

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‫as an optional attach point if we're dealing with a skeletal mesh.

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‫So that's the one we're going to want to use.

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‫So I'm going to go over into our gun.

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‫CP And in order to call it, we're going to need a sound to call it with.

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‫So we're going to add that to our configuration in the header file where I'm going to add ourselves

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‫a new UE property and I'm going to add it just under our muzzle flash called You Sound Base is going

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‫to be the type star and it's going to be the muzzle sound like.

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‫So now that we can then configure in the editor and I'm going to go over to the gun CP and we're going

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‫to spawn.

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‫So it's new gameplay statics again and we're going to call Spawn sound attached and we're going to pass

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‫in this time instead of the muzzle flash, the muzzle sound, then we've got to attach it to a mesh

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‫and to a socket.

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‫And actually for that I'm just going to copy both the mesh and the socket from above because we want

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‫to be doing it to exactly the same location, essentially having the sound come out of the end of the

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‫barrel of our gun.

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‫And if go ahead and compile, we should be able to go over to our rifle, BP, and find a new property.

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‫Sure enough, when the compile finished, the muzzle sound property popped up here and we can select

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‫from the dropdown one of the sound wave files.

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‫We don't currently have any sound cues or we do.

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‫They come from the engine, but we don't want any of those.

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‫We're just going to go with the assault rifle shot and if we go and play, you can see that we are getting

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‫the correct sound effect when firing the rifle.

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‫It's now time for your challenge to play the sound at location.

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‫That is the function you've probably used before to play an impact sound of which we have a few in here.

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‫When I did my dropdown, you could see there was the assault rifle shots.

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‫But if we also look for assault rifle, we can see that there are these impact concrete sounds as well.

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‫So you might want to choose one of those.

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‫So you're going to play an impact sound.

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‫You're going to use the Le Sound at location from gameplay statics, hook it up and test it out to see

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‫that you're getting both of those sounds in your world.

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‫Pause the video and have a go.

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‫Okay.

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‫Welcome back.

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‫So let's give this a shot.

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‫First things first, let's set up the configuration.

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‫So I'm going to mostly copy the configuration from the muzzle sound, put it underneath the impact effect,

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‫and I'm going to call it the impact sound.

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‫Then what we're going to do is just set it off compiling because we made a change to our head of file

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‫and I want it to be quick.

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‫Then we're going to go down to where we're spawning our emitter at a location.

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‫We're going to do a new new gameplay statics colon, colon.

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‫And we're going to be doing a instead of spawn sound attached.

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‫It's going to be a play sound at location.

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‫We're going to have to give it a world context.

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‫I'm going to do a get world.

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‫Then we're going to give it the sound that we want it to play, which is going to be the impact sound.

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‫And then we need to give it a location to play the sound out, which is going to be the same as the

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‫location for doing our particle effect and direction.

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‫Doesn't matter in this case because our sound is going to be the same in all directions.

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‫Put a semicolon on the end of that line and go and compile it and head over to the beep rifle where

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‫we now have the new configuration variable for the impact sound.

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‫As I said, there's going to be something with impact concrete in it.

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‫So I'm going to go and select number one from that, go ahead and play and try this out.

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‫And as you just heard there, we were getting an impact sound when we were hitting something.

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‫And if we weren't hitting anything but just shooting, all you were hearing was the rifle muzzle sound.

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‫So that's it for this lecture.

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‫We've seen how we can spawn a sound attached to an object.

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‫The next lecture, we're going to be looking at how we can randomize those sounds so they aren't always

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‫exactly the same every time they're played.

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‫See, they're.