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‫Hello and welcome.

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‫We are going to be randomizing our sounds in this lecture so you can hear the soundscape is far less

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‫boring than it was in the last lecture.

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‫We're going to be using a feature built into unreal called sound cues that allow us to do this.

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‫Let's dive in and see what they are.

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‫So our sounds are a bit monotonic as it stands.

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‫And I have alluded to the fact that there's something called a sound cue which allows us to fix this

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‫in Unreal.

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‫It's a new type of asset, so let's see how to create it.

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‫First of all, I want to create a new folder for the sound cues for both of our shot and our impact.

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‫So this folder is going to be called SFX for Sound Effects, and we're going to go into there right

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‫click, go to the Sounds menu and then select the sound cue in here.

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‫Now the naming convention here is that we start with an a underscore, as we would with a sound wave.

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‫Then I'm going to give it a useful name such as the rifle shot and then underscore Capital C.

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‫Q So it's saying that it's an audio asset and it's specifically a sound cue at the end.

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‫Now we can go ahead and open this asset and you can see we get this fun little blueprint editor with

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‫a node editor in the middle, which is a bit like the material editor, the animation editor, in that

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‫it has this output pin ready for us to plug stuff into.

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‫And the way we could start plugging something in is if we write clicked and looked for wave.

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‫You can see there is a wave player node, select the wave player node and go to the details pane.

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‫Over on the left I could select one of the sound wave files to play and then I can pull out of its output

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‫pin and plug it into our output node.

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‫And essentially I can use the play buttons at the top of the queue to preview what this queue is going

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‫to sound like.

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‫But an impressively, it's just going to play that one clip.

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‫Obviously, this is not why we put a sound cue in place.

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‫What we really want to be able to do is to do other cool stuff.

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‫And if you right click, you can see there's a whole load of nodes that we could choose from.

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‫There's attenuation branching concatenation, so we can do all sorts of stuff such as play different

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‫sounds depending on the material of what's being impacted.

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‫We can add some looping, we can do cross fades and so on and so forth.

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‫But what I'm really interested in here is some randomization.

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‫So there is a random node here where you can add as many pins as you like.

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‫And what it's going to do is it's going to switch between its inputs and give one of them out randomly

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‫as its output.

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‫There's a few properties that you might be interested here in the details pane.

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‫The most interesting one for me was the randomize without replacement, and this is basically saying

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‫that the type of random it's going to use won't cause you to replay anything until you've played all

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‫of the clips on the left hand side.

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‫It's basically a random shuffle.

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‫So what we're going to do is we're going to output assault rifle, shot one in to the random node and

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‫then output that in to the global output here.

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‫And I'm also going to copy and paste that assault rifle shot one and do a shot two and put that into

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‫the random node as well.

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‫And I'm just going to delete the extra inputs that we had here.

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‫And now you can hit the play queue and you can see how it's basically just switching between these random

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‫outputs because of this randomize without replacement.

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‫If we uncheck that, then you're going to see that occasionally it will play the same clip two times

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‫in a row.

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‫And that's why oftentimes it's useful to have that randomize without replacement so that we don't hear

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‫the repetition in our game.

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‫Okay, so that's cool.

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‫What other interesting nodes do we have here to help us have a more random sounding effect?

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‫Well, one of them is the modulator node, and if you select that, the details should give you a bit

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‫of a hint as to what's going on here.

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‫It's got a min and max pitch and a minute max volume.

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‫And as you might guess, the whole purpose of this modulator node, if we just plug it in to one of

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‫our clips and to the output, is that it's going to randomize the volume and the pitch.

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‫Let's try it out.

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‫Now, the effect is not very noticeable there because we don't have very big ranges.

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‫So I'm going to go between half volume and two times volume and see if we can hear that now.

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‫Hopefully you're able to hear the variations there.

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‫Let's also try some bigger variations in pitch two times, pitch and half pitch, and let's just reset

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‫the volume.

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‫So hopefully you're able to hear the difference there in the min and max pitch as well.

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‫So then what we can do is we can put these two nodes one into another and we're then going to get random

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‫clips and additional modulation on top of that.

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‫Now we have a lot more clips here than just these assault rifles shot one and two.

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‫So I want to get bring all of these in, but it can be a bit tedious to duplicate and select the clips.

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‫So here's a little shortcut for you.

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‫If we go over to our content folder, go down into the asset packs, shoot a game sounds, and then

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‫the weapon assault rifle, mono.

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‫You can see we've got the clips that we want here.

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‫So I'm going to select from shot one to shot six.

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‫Then I'm going to go over to my cue editor and I'm going to right click in there.

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‫And you can see there is this from Selected Option, which allows us to bring in multiple clips in to

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‫various nodes that take multiple clips.

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‫And the one we're interested in is the random node.

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‫And if you select that.

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‫And you get six different wave players all inputting in to a random node so we can now delete the other

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‫random node we had manually created and we can use this new random node instead.

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‫And that's sounding much better.

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‫Now, I just want to tweak the settings here for our pitch.

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‫I don't think we want such a big variation in pitch, so I'm just going to reset those down to the defaults.

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‫I do want a slight more variation in volume though, so I'm going to go 4.7 to 1.3 and then let's go

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‫ahead and play that.

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‫I think that's a good variation and it definitely doesn't sound boring anymore.

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‫I'd like you now as a challenge to apply the same process to the impact sound effect.

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‫So create a sound queue, add randomization, add a modulator, and then play around with the volumes,

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‫the values, rather to see what works best for the impact sound.

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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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‫Let's give this a shot.

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‫So we're going to go over to our content SFX right click and we're going to try and create a new sound

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‫asset.

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‫And it's a sound cue.

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‫So a underscore we're going to call it rifle impact and then underscore cue.

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‫Let's go ahead and open that one up.

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‫And we essentially want to do the same thing here.

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‫So first of all, I'm going to add in a modulator and output that to the output node.

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‫Then we're going to go over to our sandbox, skin up to the root content asset packs, shoot a game

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‫sounds weapon mono.

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‫And then I'm going to select from all of the impact, sound effects, there should be six of them and

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‫then going to go over to the impact cue right click and add in the random node and output that random

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‫node into the modulator.

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‫And then from my playing around, I found that the modulator works better here to have a bigger pitch

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‫difference because something plinking off concrete or whatever substance that is could make various

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‫sounds depending on what angle it's hitting it at.

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‫So I'm going to go between 0.5 and two with less of a volume variation here.

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‫Let's go ahead and try playing this queue.

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‫Okay.

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‫So I think that sounds good with a good amount of variation.

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‫Now all that's left to be seen is if we can put this into our rifle and you may have already tried doing

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‫this, we can just go over to where we have our sound effects in the beep rifle and change out the wave

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‫that we were using for a sound cue so we can swap it out for the rifle impact or shot cue on the muzzle

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‫sound.

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‫Then the impact sound we're going to switch out for let's go and find it should just be something called

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‫impact they go rifle impact cue.

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‫We can go ahead and play that now and we can hear a good amount of variation in the sound that was going

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‫on there, that the different muzzle flashes sounded different and the impact sounds sounded different.

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‫Now, if you're playing this with headphones, you will notice that it all sounds a little bit flat,

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‫like there isn't a sense of space.

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‫That's what we're going to be dealing with in the next lecture.

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‫So in this lecture, what we have done is we've over viewed what a sound cue is and how it can allow

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‫us to do lots of cool stuff with sound, including adding randomization and making our sounds less boring.

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‫I'll see you in the next lecture.