WEBVTT


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Hello and welcome to a special 
update you might have noticed 

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if you watched the last few 
S’updates or the last Small is 

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Beautiful that we did 
this week, this past week, 

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that my audio was out of sync. 

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In fact, if you're paying 
attention right now, my audio 

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should be out of sync. 

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And I want to show you how I 
fixed that, how I found out 

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what the problem was 
and how I fixed it. 

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So let me show you, 
first of all, I'm also going to 

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put on these headphones so I 
can hear what you're hearing 

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from my monitor over here. 

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So, all right. 

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Now I can hear myself. 

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The audio is fine. 

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This is in terms 
of levels, et cetera. 

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And let me show you 
my setup just slowly over here. 

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Wait a minute. 

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Actually, let me switch it 
up first, because I had it 

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really nicely placed there. 

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There we go. 

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Let me pick up the camera now. 

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So this is my 
setup and lots of screens. 

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I know. 

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And in terms of the audio, so I 
have a Blue Yeti microphone up 

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here and that Blue 
Yeti microphone, I'm going to 

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stand up here and try not to 
snag my headphone cable off, 

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has a USB connection 
here and a mic connection. 

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And you can see apart 
from also it's quite dusty. 

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You can see that 
they're both connected. 

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What's happening is I'm using 
the USB for power and I'm 

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actually getting an analog 
signal out of the the headphone 

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jack over there and 
where those are going to…

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So if you look over here, 
I have a USB hub and this is 

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the power coming in. 

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So that's just providing power 
to the Blue Yeti. 

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Now, you can't connect 
this to any power source. 

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It has to be a computer. 

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The Blue Yeti is very 
peculiar about that. 

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And the headphone jack, if you 
follow that… is connected to 

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the back of my Atem 
Mini Pro into the microphone 

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input over here. 

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And now if you look at my Atem 
controller here, you'll see in 

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the settings that it's the mic 
is set to line. 

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OK, that's important. 

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I'm not going to put it on 
microphone right now because it 

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would deafen you, but the 
headphone jack provides a 

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signal that's a little lower 
than line usually, but it's 

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still much higher than 
microphone powered like a 

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microphone with power 
would be providing. 

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So that would be very, 
very loud if I switch to that. 

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Now, the problem is and you can 
see that the sync is off, 

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I'm assuming I can't see 
that right now. 

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But I'm assuming if you're 
watching this, my lip 

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sync is off. 

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And that's because let me show 
you my camera over here. 

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So the video is coming out of 
this Sony Alpha 6400 and it's 

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coming out via HDMI that you 
can see over there. 

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So the problem is 
that HDMI has latency, 

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all HDMI has latency. 

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So the video is coming in 
slower than the audio. 

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And that's why there's 
no lip sync. 

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Now, with 

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the Atem Mini Pro – with the 
app –  which I'm running on a 

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MacBook over here, 

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you can actually 
set the latency. 

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So I can… if I go over here, 
over here, I can actually add a 

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delay so I can add, 
I don't know, let’s say 

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[stuttering audio] four frames 
of delay, which is now making 

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it very difficult for me to 
speak when I hear myself, 

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because it's coming in 
four frames delayed. 

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So I'm just taking 
the headphones off. 

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Now, this may or 
may not fix the problem. 

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I am going directly from my 
microphone source in the mixer 

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and previously four frames of 
delay is what I 

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arrived at experimentally. 

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But recently 
something happened. 

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I don't know what it was. 

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And I've done some tests and it 
seems like maybe when chroma 

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key is on, 
the delay is different. 

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Maybe this latest version of 
the the software has 

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actually fixed it. 

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I don't know, because I 
only just updated. 

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But the problem really is that 
this is not the way you should 

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be doing it. 

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Right? 

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And so why was 
I splitting this up? 

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Why was I taking… or why did I 
decide that I should put, like, 

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the audio in directly to the 
mixer instead of into the mic 

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­– into the, sorry – into 
the camera, which is how I 

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could have done it. 

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And that's because when I 
tried it, I just got horrible 

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static and horrible noise and I 
tried to narrow it down back 

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then when I first set it up and 
I didn't have time, so I 

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was like, OK, I'll do 
it like this. 

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And then Atem came up with the 
delay and it was OK. 

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So I'm going to 
turn that delay off again. 

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So that will 

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[stuttering audio] and there we 
go, the delay is zero 

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now on my Atem controller… you 
can see over here the 

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delay is zero. 

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And let me show you what 
happens if I just plug the… 

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instead of the line in… So 
instead of plugging it into 

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the Atem, if I plugged it into 
the into the camera directly, 

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let's see what happens now. 

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I'm also going to… over here… 
momentarily… Let's see. 

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Let me put my headphones on as 
well just so I can 

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hear what's happening. 

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OK. 

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All right. 

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So for one thing, I do have the 
audio levels on the camera. 

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Let me try and get that here. 

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The audio record level is set 
all the way down to one. 

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OK, so when I do the switch, 
hopefully it won't it won't 

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deafen your ears. 

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I'm taking out the audio. 

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So are you going to lose my 
audio momentarily… [silence] 

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OK, and I just plug it in to 

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to the camera and you 
can hear it. 

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I mean, it's I've 
turned it down the doors. 

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You can see on the on 
the camera, if I like to show 

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you this, if I go to the menu, 
your record level, you see 

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it's that one. 

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And if I'm quiet for a second… 

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You can hear 
that sound, right? 

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If I actually turn 
the audio level up…

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OK, so that's the that's the 
buzz that we're getting and 

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this is terrible, 
terrible audio. 

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Of course, it's terrible 
audio, but if you 

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are watching now my lips, 
that should be in 

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sync because, of course, 
the audio is now coming through 

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the HDMI and it's synched in 
the camera and it's coming 

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into the mixer. 

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And at that point, 
it's it's mixed. 

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So there's not going to 
be any lip sync issue. 

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This is how you should 
be doing it. 

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Now, this is not the horrible 
audio you want now. 

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I mean, we can try 
and make it a bit better. 

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So it's much louder, 
of course, because remember, 

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it was set to 
line on the other one. 

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So you can… what you can do is… 
let me show you you can try 

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turning down the headphone 
jack over here. 

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And now that should be a bit 
better if you can still 

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hear me. 

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And also, there is, of course, 
a gain at the back of the… of 

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the [Atem] let's see… 

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Let's try to 
get that in there. 

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There's a gain and you 
can turn that down as well. 

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All right. 

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So but this is not 
great audio by any means. 

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You can hear 
that terrible humming. 

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So I was like, OK, why why is 
this humming happening? 

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And so today, what I did and 
I'll do it now, it's got to do 

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with the USB connection with 
the power connection 

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over here. 

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So it's got to do with this. 

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So what I tried was, OK, oh, 
it's gone to sleep again. 

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So let me turn this… 
or is it just… [wakes Mac 

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from sleep] ok, there we go 
what I thought was OK, so what 

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would happen if I changed… If I 
unplugged…the  I wasn't using 

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this USB hub, but I plugged it 
into this old MacBook Pro, 

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Laura's old MacBook Pro that's 
just lying around here. 

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So look at what 
happens when I do that. 

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You're going to lose my audio 
for a second again and then it 

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will come back. 

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[silence]

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All right, so now it's being 
powered by the MacBook Pro. 

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And can you hear that? 

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That's actually way better! 

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There is it's not 
the same sort of 

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the same sort of noise 
that we have. 

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So if I go over here onto the 
camera and I just turn up. 

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The audio level… 

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You can see you can 
hear when I turn it up… 

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There is some, but… It's not… 
and of course, it's going 

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to be clipping. 

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But that is so much 
better, so, OK, so that was 

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the “aha!” moment. 

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All right, so this has to do 
with how much noise there is, 

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how clean the USB 
connection is. 

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So it's it's electro 

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electromagnetic 
interference, basically. 

00:11:08.240 --> 00:11:13.370
So I was like, OK, I'm not 
going to use a MacBook Pro 

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for this, not least of all, 
because that MacBook Pro, 

00:11:16.820 --> 00:11:19.309
even if it's just on at 
some time, sometimes the fan 

00:11:19.376 --> 00:11:21.970
comes on and that's 
really loud. 

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So I was like, OK, what is? 

00:11:24.176 --> 00:11:26.269
And again, you can't connect it 
directly to just a 

00:11:26.336 --> 00:11:27.110
USB power source. 

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It needs to be a computer or 
the blue yeti doesn't work. 

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So it's like, OK, what's the 
simplest computer that I could 

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have that's also silent? 

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That's also really well 
built and shielded. 

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And that is what 
brought me to try… 

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the. 

00:11:45.700 --> 00:11:46.750
Raspberry Pi Zero. 

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So this is a Raspberry Pi Zero, 
one of a couple that I 

00:11:50.476 --> 00:11:56.980
have hanging around that I was 
playing with and I was like, 

00:11:57.046 --> 00:11:58.110
let's try it with that. 

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Now, every component matters in 
terms of the noise. 

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And this is connected with the 
official cable, to… that's 

00:12:06.946 --> 00:12:11.559
actually an iPhone (or 
an iPad) power adapter there. 

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I tried it originally with with 
a Raspberry Pi 4 with the 

00:12:19.306 --> 00:12:21.820
original Raspberry 
Pi power adapter. 

00:12:21.970 --> 00:12:24.490
And that was very, 
very low noise as well. 

00:12:25.360 --> 00:12:28.269
Much lower noise, actually, 
than the MacBook Pro. 

00:12:29.019 --> 00:12:33.549
So I was like, OK, I 
hope it works with the with the 

00:12:33.616 --> 00:12:35.490
Raspberry Pi zero as well. 

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And spoiler: it did! 

00:12:38.980 --> 00:12:41.350
So let me just show 
you what it's like with that. 

00:12:41.416 --> 00:12:43.409
But also remember, 
every component counts. 

00:12:43.476 --> 00:12:48.340
So this cable here, for example, 
if I was to use so 

00:12:48.406 --> 00:12:50.860
this cable here is where I'm 
going to connect the USB 

00:12:50.926 --> 00:12:53.320
from the Yeti. 

00:12:53.710 --> 00:12:57.519
But I also tried it with this 
sort of cheap adapter that I 

00:12:57.586 --> 00:13:02.649
had and there was a 
lot more noise with this. 

00:13:02.716 --> 00:13:05.269
So every 
component really matters. 

00:13:05.679 --> 00:13:08.080
So again, we're going to lose 
audio for a second, 

00:13:08.146 --> 00:13:14.289
but hopefully for the last time 
and I'm going to unplug the USB 

00:13:14.470 --> 00:13:17.230
from the MacBook, 
oops that's the power… 

00:13:42.200 --> 00:13:42.700
[silence … struggles to plug in 
USB with one hand] 

00:13:42.766 --> 00:13:43.266
Right. 

00:13:43.333 --> 00:13:49.100
OK, so I've just plug it in, 
that is that is harder to do 

00:13:49.166 --> 00:13:51.309
than it looks with 
one hand to push you, 

00:13:51.620 --> 00:13:53.809
apparently 
beyond my capabilities. 

00:13:55.070 --> 00:13:55.570
All right. 

00:13:55.636 --> 00:13:56.136
So… 

00:13:57.730 --> 00:14:01.809
Now, that is connected to a 
Raspberry Pi Zero and that is 

00:14:01.876 --> 00:14:07.720
connected to power, so the Blue 
Yeti is on, and I 

00:14:07.786 --> 00:14:09.019
have my levels. 

00:14:09.309 --> 00:14:14.860
What's interesting is I found 
that the levels are lower. 

00:14:15.519 --> 00:14:19.440
So I'm just going to 
say, OK, here we go. 

00:14:19.506 --> 00:14:20.289
Actually, there we go. 

00:14:20.409 --> 00:14:23.019
Let me let me just adjust this
… Oh, of course, the gain… is 

00:14:23.086 --> 00:14:25.120
up so the levels are lower. 

00:14:25.186 --> 00:14:28.629
So what I can do… 
is… I can turn the gain… 

00:14:30.669 --> 00:14:32.649
All right, wait a minute, 
sorry, let me switch to the 

00:14:32.716 --> 00:14:37.169
camera so you know what 
I'm doing, I can turn the gain 

00:14:38.500 --> 00:14:41.259
almost all the way 
down over here. 

00:14:41.980 --> 00:14:43.600
Now, you're not going 
to hear me very well. 

00:14:44.139 --> 00:14:46.240
I'm just I'm very close 
to the microphone right now. 

00:14:47.710 --> 00:14:53.620
And what I can do is I can then 
use… here… Let's switch to 

00:14:54.399 --> 00:14:59.740
this… I can then 
adjust the volume over here 

00:14:59.980 --> 00:15:00.820
that I'm getting. 

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And and that's pretty good. 

00:15:04.899 --> 00:15:06.399
OK, I'm in the reds 
a little bit. 

00:15:06.466 --> 00:15:09.940
So if you look at my monitor, 
you can see my levels. 

00:15:10.149 --> 00:15:12.190
But I'm going to stop talking 
for a second and I just want 

00:15:12.256 --> 00:15:14.289
you to take a look 
at those levels there, OK? 

00:15:14.356 --> 00:15:14.856
[silence]

00:15:20.429 --> 00:15:24.870
And that's how little noise 
there is with the Raspberry Pi 

00:15:24.936 --> 00:15:28.470
Zero with the Blue Yeti 
connected to the 

00:15:28.536 --> 00:15:30.299
Raspberry Pi Zero. 

00:15:30.690 --> 00:15:33.929
So again, I'm just doing 
this all live. 

00:15:33.996 --> 00:15:36.299
So these are… not I'm going to 
get the levels just right. 

00:15:36.809 --> 00:15:44.009
But that, in a nutshell, is how 
I'm going to be doing things 

00:15:44.076 --> 00:15:44.669
from now on. 

00:15:44.736 --> 00:15:47.929
And that should solve the 
lip-sync problem completely

00:15:47.996 --> 00:15:48.496
. 

00:15:48.600 --> 00:15:49.230
And 

00:15:50.940 --> 00:15:51.509
yeah, 

00:15:53.009 --> 00:15:57.600
I can turn the mic off 
from the Atem Mini Pro and. 

00:15:57.690 --> 00:15:58.190
Yeah. 

00:15:58.256 --> 00:16:02.159
So it should be going in, 
synchronized into the Atem and 

00:16:02.226 --> 00:16:07.309
this… So the real thing is that 
this little… If you're having 

00:16:07.376 --> 00:16:10.879
the same issue, for example, 
get a Raspberry Pi Zero. 

00:16:12.009 --> 00:16:15.019
Get the official connector 
and everything, it might be a 

00:16:15.086 --> 00:16:19.370
few bucks more, but just get 
the good stuff and I think this 

00:16:19.436 --> 00:16:23.480
cable was from Pimoroni, I'm not 
sure in of their sets 

00:16:23.779 --> 00:16:26.269
or I don't know if it's just a 
Raspberry Pi official cable, 

00:16:26.336 --> 00:16:26.836
I don't know… 

00:16:27.379 --> 00:16:30.139
But just get all good 
components for it, 

00:16:32.830 --> 00:16:33.330
and, uh… 

00:16:33.396 --> 00:16:39.370
That is how you can get very, 
very clean audio out of the 

00:16:39.436 --> 00:16:42.610
headphone jack and into 
the microphone, jack of 

00:16:42.676 --> 00:16:49.610
the computer, and that way you 
you won't have any audio 

00:16:49.676 --> 00:16:50.799
sync issues whatsoever. 

00:16:51.340 --> 00:16:53.230
So I hope 
you found this useful. 

00:16:53.590 --> 00:16:56.289
And this has 
been a special 

00:16:56.356 --> 00:17:02.049
little S’update, today, Sunday, 
May 23rd, 2021. 

00:17:02.350 --> 00:17:02.950
Take care. 

00:17:03.190 --> 00:17:03.759
Be well. 

00:17:04.299 --> 00:17:04.750
Bye bye!