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“Back to another audacity tutorial in this video. We re going to be playing with with some different effects. The ones. We re gonna do are changing the speed changing tempo and changing the pitch.
So to get started let s go ahead and just let s record in some voice. So that we can get a good idea for what s happening here. This is test audio testing one two three okay so now we have our audio in here. If we play it back that sounds just like it did when i said it so if we want to change the speed of this change it so it plays back faster.
That s kind of one of the most common things first of all like we learned in our last video. We have to make a selection so if we go to fx and go down to change speed. We re gonna get this kind of an error message and just saying or this dialog that says you need to make a selection first. We can press ctrl a to select all so ctrl a we can also just select all by ourselves like doing this do or we can just select any portion that we want to increase the speed.
But i m going to do select all this another way to do is go to select and then go to all and then we can go to effects and speed change speed and then this is sort of like we did with the amplification. We have a slider bar here and we have some different numbers. So if we change the speed multiplier down to zero again. We re going to be oh actually the percent change is zero.
If we change the percent this to zero and the speed to one it s going to be same speed nothing will change so we do okay. So that s kind of our baseline. So knowing that we can change the speed to either faster or slower to be either less than 1 on the multiplier or more than 1. So if we did.
2. Here it would be twice as fast and it was so it would be 100 increased by 100 if we did 05. It would be 50 of normal speed. So you can control either one of these two boxes are linked.
So let s just do this real quick. Let s do the 50. Let s do it half as fast as this normally supposed to be so we go okay and then we see what first of all happened our first audio recording was four seconds long or four and a half..
I guess and now it s like nine seconds long because it s half the speed. So it takes twice as long to play that so let s play and see so it s just slow motion like you would imagine let s go undo. We click this back arrow here or we can press ctrl z. On the keyboard.
It s still selected so let s go to fx change speed and now let s we can type in if we want to do two. But we can also use the slider to get it kind of a more granular. So let s go to let s do it about maybe one point seven six and then we go okay so now you see it s almost instead of being four and a half seconds. It s only two and a half seconds.
So it s gonna be much quicker because it s playing faster. So we ll play this and you notice the pitch of my voice changed to when it was long. It was very low there s a lot lower because it s slowed down. I guess what i m saying is not only did it slow down the audio.
It also in the process lowered and raised the pitch of my voice. So it s like high pitch. Now and so the way we can change that if you want to speed something up slightly. But you don t want to increase the the pitch maybe.
It s music need to throw off the key let s go back the thing. We can do is we can actually go to effects change tempo. And what that s going to do is change the speed. It s gonna change how quickly the file the wave is being played.
But it s not going to adjust the pitch. So we can select all of this let s go to control a to select all and let s go affect change tempo. So now we can change the tempo and have it be played one and a half times faster than it normally is wait a percentage maybe this needs to be so actually let s play it 150 percent normal then it needs to be or than it was regularly and we click ok so now look it shrinks it down. But now if we play i don t think my voice will be high pitched.
You see so it s my my voice is the same pitch as it is now it s just playing through much faster. I m gonna do control z. I m gonna do control c..
And control v. So we have this twice and we re going to i m gonna show them back to back so we see what s happening here let s go to effect. Change speed let s make this one 15. Or actually so we re doing the same thing.
We ll make it a hundred and fifty percent and we or let s just make it a hundred percent go okay and then let s select. This part. I just double click on it to select just that area cuz. See there s look separation between them and we go effects change tempo.
And it changed this to one hundred and go okay. So now we can play these two and one is jett. They re both the same they both take about two seconds long to play. But one is gonna be a higher pitch.
You see what i m saying so they these both have the same tempo. But they have a different pitch. I m gonna come to the end here and do control v. And paste.
This file again. This is the original again so if i double click this and select it all we can go to effects and this third thing. We can change is the pitch. So if we change the pitch of this we can actually change the pitch and make me talk in a different key.
So it s saying right now. I don t know if this auto detects. I m not actually exactly sure. But this is saying change it from f.
So if any note if any yeah basically if there s anything that was an f will get changed to down to ag sharp or a flat. If you re if you understand music and so what s going down eight point eight four semitones and so we can adjust this to or. It s also in so this is why do pitch this is everyone do frequency..
So it s changing from a frequency of 50. 500 hertz down to a frequency of 3300. Hertz and that change represents roughly forty percent. So you could imagine if we double click and change.
This to zero this is neutral. This is from the key of f to the key of f. This is from this hertz to this source which is the same so if want to make it a higher pitch. We had above zero.
We that this percent change be above zero. If i want to make it a lower pitch. This is below in the negative. So let s let s make it.
Let s just make my voice a tiny bit lower let s go down. Let s go down. Like just 20 lower maybe like this 21 lower. And okay.
So the speed is the same you see it didn t change the size of this it s still lasting about four and a half seconds. But it s going to be lower let s play and see if it sounds different okay so i m gonna undo that let s now it s back to normal. I can double click and we can change the pitch again and we could this time we can make it high we can make it be above zero. So we come over here to above zero.
And let s make it 20 faster than it originally was recorded in so we go okay all right so there we go we ve got we ve changed. We can change the speed. If we go to effects change. Speed that changes how quickly it s played or slowly.
It s played and it also changes the pitch so speed that does both speed is basically doing pitch and tempo at the same time pitch. Obviously just does the pitch that if it s high or low and tempo. Just does the speed and keeps the pitch constant so play with those three and then i want to show you one more thing if we just go file new and we bring in this audio file..
I ll go open this jazz guitar. So suppose we know what key this is in this this music. Let s say it s in the key of g. Maybe.
So if this is in the key of g and we want to transfer. We want to change this someone sends us some music and they say hey we re trying to sync this together with like another piece of music or i or they or they want to have someone accompany and play along with it but they need it to be in the key of f. And not the key of g. We can go okay cool we go to effects.
We go to change pitch and then we can change it so we can say change it from the key of g to the key of f. Uh. Huh and then we go okay and so i just changed the key on there now if we play it sounds kind of the same right. But it actually is different we ll play this and i ll do undoing.
We ll see do see so it s lower the music s down sounds the same. But you just changed the key and so that s why it s kind of nice with this that it lets you oops effects change pitch. It s nice if it lets you do that if you do know the key that it s in that s why this is that s why this is pretty nice for changing music. And then as far as voice goes you might just use the frequencies or the slider well.
I hope that made sense to you go ahead and play with these different effects and you re welcome to click on some of these other ones. Too you ll notice they all work kind of similarly. Sometimes it will bring up a dialog box. Sometimes it won t but we ll be looking to some more of these in future tutorials.
Appreciate you watching go ahead and like comment subscribe. Leave your questions below and ” ..
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