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- [Instructor] Let's talk
briefly about audio connections.

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And let's say you have a computer

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like a desktop or a laptop computer.

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Audio ports on these
systems allow audio signal

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to be inputted to, and
outputted from, a computer,

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you know, your laptop, your desktop,

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whatever system you might have.

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For the most part on computers
like desktops and laptops,

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you only see TRS 3.5 millimeter mini-jacks

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and also optical connectors in some cases.

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So let's show some of these now.

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Here are a couple images
of the sound ports

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you might see on a desktop computer.

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And the first one is a sound
card that actually goes

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into an adapter card slot.

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The second one is integrated
to the motherboard.

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So let's look at these ports.

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They're all color coded,

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and this is part of the
PC system design guide,

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which was finalized in 2001.

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And you might see PC 99 or PC 2001.

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Those are system design guides,

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which include all kinds of things,

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including color coding
for each of these ports,

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and that color coding stuck till today.

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So these are the colors we use.

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First here, we see blue,
and that is a line input,

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and its seconds as a mic input.

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So if you have a headset and
you wanna use the microphone

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on it, you'd plug that into the blue port.

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Now, in some cases, this will be pink.

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Sometimes it is a pink input instead.

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If it is pink, it's microphone only.

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If it's blue, it could do microphone

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or act as a line input from other devices,

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like your smartphone or
from an audio device,

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like a audio processor or
some type of music device.

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Then we have green.

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That's the main stereo output.

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If you have just two
speakers, or your headphones

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if you're using headphones.

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And that's what people
are usually gonna use.

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That's gonna be the port, the green port

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and it's known as lime green.

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It can also act as a line out
to a PA system or a stereo

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or if you want to, you
know, connect your computers

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to a much more powerful system for sound.

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Then we have our surround sound ports.

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First, we have the
black, that's the output

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for the surround sound
speakers, the back speakers.

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And then we have the orange
and that's the output

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for the center speaker in
front of you and a subwoofer.

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So used collectively
the green, the orange,

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and the black give you 5.1 sound,

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five speakers, plus a subwoofer.

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Then on this card, you have the gray,

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and you know, you're not
always gonna see that

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on every system, but on
this particular card,

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we have this gray connector,

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and that's the output for
the surround sound speakers.

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And that'll give you 7.1.

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So additional surround sound speakers,

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speakers that go on the side of you.

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And so now you seven
speakers plus the subwoofer,

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so that's known as 7.1.

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Not too many applications
or games actually program

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in 7.1, usually 5.1 is enough.

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Even movies, usually 5.1 is enough.

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So those are your TRS ports,

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3.5 millimeter also known
as 1/8 inch mini-jacks.

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Then here, we have S/PDIF or SPDIF.

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And that stands for Sony/Philips

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Digital Interconnect Format.

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What we see here is known as TOSLINK.

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And what that does is it delivers
high quality digital sound

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over fiber optic cable.

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It's also known as a digital optical port.

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And a lot of audio
files will consider this

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to be sonically superior

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to using this main stereo line out.

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So you'll see that sometimes.

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S/PDIF, that's also referred to as SPDIF.

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And we have two ports on this card.

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We have the gray, which is the output,

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and we have the black, which is the input.

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So you wanna remember those for the exam.

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On this integrated set of sound ports,

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we only have the optical digital line out,

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and that's common on today's computers.

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You know, you might use this as a line out

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to a specific audio device.

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This particular sound card
has the line in as well,

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in case you have a audio
processor or other mixing board

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or something that can actually
send that output of music

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or other audio data.

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And you would input that there.

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Let's show the audio ports
on our AV editor now.

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Okay. So we have an integrated
set of sound ports here,

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and it's basically the
same thing that we were

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showing before.

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And they're well labeled with this panel

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that they give you with the motherboard.

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And so here we have the pink,
which means it's mic in only.

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And we do also have the
blue, which is line in.

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So if you want to connect from
a smartphone or something,

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you would use the blue.

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If you have a headset with a
microphone, you'd use the pink.

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Then here we have the green,
which is our main out.

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So if you have stereo speakers
or you wanna use headphones

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or you wanna line it
out to a stereo system,

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or what have you,

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then the green is what you're
gonna use, that lime green.

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And then we can do 5.1 Dolby surround

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by using these other two ports

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in addition to the green.

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You have your rear speakers,

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and then you have your
center and subwoofer here.

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And it's all labeled.

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And then also we have an output SPDIF

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that uses TOSLINK

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And if you look here, this pad right here,

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I can push that right in actually,

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and the optical cable
goes directly in there.

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Now, when you buy these
TOSLINK optical cables,

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they come with little caps,

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and you wanna take the cap
off before you plug it in,

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otherwise it won't fit.

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But you wanna keep those caps on

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until you do plug it in,

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cuz this actually sends light.

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It sends photons through the cable,

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and that's what the
audio signal is sent as.

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So you wanna keep that
connector really clean

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and covered until you plug it in.

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So those are our audio
ports, pretty basic.

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And so make sure you know
each of these for the exam.