in today's video I'm going to be showing you how to connect to VTX not only connected but also use the thing that's called smart audio and how to also configure it on the software side so it's smart audio will allow you to do is allow you to change the channel and your output power through the on-screen display now if you don't know what that is you'll eventually come to know what it is but if you still don't know how to connect your video transmitter also known as the VTX which I'm going to call it VTX from now on then this tutorial is just for you I'm gonna help you understand the basic concept and also show you by example where everything goes so the first and most important thing is the power now obviously anything needs power to run so there's two categories for the power there's either five volt and there is something called battery voltage and how do you know the difference between both of them so if a VTX takes battery voltage usually most of them do one less select these smaller ones but you can always double check this by taking a look at the VT X or the documentation they provide you with now if we take a closer look here we will see seven to twenty six volts now don't let this 5 V cam 5 volt cam trick you ignore that you don't need that so seven to twenty six volts means battery voltage sometimes it'll be seven to thirty one volts anything above five volts is basically going to be battery voltage and I'll show you where to get battery voltage from now the next thing is going to be the five volt V T X's such as this one right here and how do I know this little tiny one is a five volt V px well so if we take a closer look at the instruction manual we can see that there's a five volt in and a five volt out ignore the out that's going to a camera so this one only takes five volts and it will always tell you how much they take always ignore the 5 volt cam or the 5 volt out that's just an output and if you connect anything there that's not supposed to go that you could fry the whole thing so this VTX will take 5 volts so let's start with the 5 volt VT X now how would we connect this well we would need to find the 5 volt in ground any ground will do so it's usually called G and E or the minus sign so 5 volt in and ground so it's the first 2 right here and there's the LEDs trying to tell us where it is so yeah we're looking correctly here so the red is going to be 5 volt and the block is going to be ground for example here I have a 5 volt and a ground open and I would just put the power there for the 5 volt VTX and I'm good in that perspective so now these VT X's that take battery voltage or they take seven to twenty six volts some will take seven to twenty five some seven to twenty one it just depends what that means is battery voltage now when you grab some flight controllers let's start with the red wire which is the power wire for example this one's all the way on the Left where it says seven 226 volts and it would be the red wire here and on this VTX if we take a closer look usually have marked around the same thing this one seven to twenty five volts still within the range and it's this red one right here so where would the red wire of the battery voltage go now it can go into multiple places some flight controllers will have pads called 9v which means nine volts some flight controls will have eight V some will have twelve volt and some won't have anything so if it has eight nine twelve or whatever you could install the red wire on that pad however if it doesn't have one of those then you'd want to install it on your main power positive where the battery is being connected so for example on this one this is where we would actually connect the main battery or what we would call the xc60 where the battery is connected you see this red wire that's where you want to put your VTX wire now in here I have a five volt V T X so it doesn't go for this VTX here but you would want to put it right here and there's many places it could be sometimes your flight controller doesn't have this and usually nowadays what you'd find is you buy something like this which is a flight controller in the esc now let's say this one has a nine volt but let's pretend it didn't have a nine volt so where would I put the red wire well I would put the red wire where the battery's gonna be connected because this is where the battery would come in just like this drone right here and as you can tell the motors are connected to the side and that's what would happen on this one so I'd find the plus sign and I would put my wire there and my plus sign is right there so that's where I put the red wire from this VTX there hey or the red wire from these VTX there now that's covered next is the ground which is the black wire it'll go on any ground pad it doesn't matter and you'll be fun you could even connect it to here or you can even connect it to here so that doesn't matter now we're left with either one wire or two wire some V T X's have something called smart audio and let's leave that fair loss the next wire is the most usually it's just three important wires to connect which is again the red black and yellow which is the video and you were like why can't you just connect the camera direct to the video line well for a couple of reasons now we get this very valuable information on the screen that gets overlaid over the camera image and it's something called OSD on screen display and it's this little chip right here I don't want to get too far in it because I don't want to lose you but anyways the cameras video signal would go through this chip and then pop out to the video transmitter and overlay all the information down to our goggles so the yellow wire or the video wire whatever color it might be but usually it's yellow it would either go to a vo pad which means video output because each flight control has its own naming schemes or it would go to a pad called VTX or even cam out sometimes so for example on this flight controller we have it's called V out the completely calling it V out so video output here what they're calling it is VT X so it's right there and yet that's the thing to look out for either video out in some sort of abbreviation like V out vo video output or v TX that's what they'll usually call it and that's what your yellow line would go and that goes for every single v TX no matter if it's a 5 volt or these big V T X's they all work exactly the same way next we have the thing called Smart audio so I'm going to show you where it would be connected what to look for and how to even configure it inside the beta flight configurations tab so every flight controller has some pads called either R 1 and T 1 and R 2 and T 2 or they would leave the call it rx 1 and R on TX 1 so what do those mean well basically you can think of them as USB ports on the flight controller and if you see a RX 4 and a TX 4 basically this is one USB port so if you use the R then you're not going to be able to use the 2 for another device but if one device the same device needs the R and the T then you can use them but for example you have your receiver which would go on our we'll explain that later if you don't know how that works you can't put the smart audio on the same T so if we have the receiver on RX 4 we're not going to be able put the smart audio on tx4 we would have to go final and that's not being used now what does the R stand for and what is the T stand for well the R is to receive data so if it wants to receive something then you would put it to the R now if it wants to send something it would go to the T which is transmit data so we want the flight controller to tell the VTX what to do so we want a transmit pad so any TX number or T number is gonna work just fine so for example here what we can do is we can either put it on TX 4 TX 3 and any other TX that's open and here's a TX 1 but for example if you're using rx 1 for something else then you cannot use the TX 1 so keep that in mind so if one of the numbers is being used you can't use the opposite of it so you have to find two that are open because that simulates just a one USB connection so just imagine a USB is connected into one of the numbers that's it you can't use it because something's already connected there hopefully that made sense so on this flight controller where I've said it is on TX 1 it's right there on TX 1 here this is my smart audio so you can see that right there it says smart audio and here I think it also say smart audio and here we go here we have more smart audio now usually some of them will come with 2 extra wires left over like these guys and what that is is an extra voltage regulator for the camera but we're not going to be using that so what you can do is just cut them off but when you cut them off be careful not to have little strands sticking out because that'll be a nightmare for you so for example we're not going to be needing the 5 volt cam and this ground ok so because we're already giving 5 volts from the flight control will cover the cameras in a later video but we're giving 5 volts to the camera from here so what you can do is once you figure out the two wires you don't need you could actually remove them don't pull like this you can grab yourself some tweezers here and find them so for example we don't want these two so what can we do with these here well if you take a closer look here you'll see these little tabs right here so for example I don't want this second one which is blue this was the 5 volts so I just pull slightly bend the pin up or Bend that plastic up slightly like that and then quickly just pull the blue wire out and now it's and keep these these will come in handy in a later day because usually these are all the same size and you could just stick it back in this where you didn't break it and then you can push it back with your finger that little plastic piece and we're gonna do the same thing to the other wire as well so we're just gonna bend it and pull it this is the best and safest way to do it because sometimes if you cut them even really short they might short-circuit and that could be a nightmare if you lose video feed in the air so now we're just left with four wires basically for that VTX okay now I've connected the USB but before I go into beta flight I need to remember what I put this smart audio on and here I've set it up on TX 1 now this is gonna play a big role right now so remember TX 1 currently for our board here alright so the first thing you want to make sure is you're on the correct comport now I know com1 is nothing on my PC so it's calm 15 we're gonna go ahead and go into connect and now we only need to focus on one tab on the left which is called the port's tab now this will play a big role later on in the future videos how to set up your receiver and this is really critical part of everything now remember how we have the TX 1 the TX 2 and the TX 4 and all these this is what they relate to so UART one would be TX and rx 1 u r2 which is we'll call it USB 2 is 4 RX 2 and TX 2 and again it goes down for everything now we've installed our smart audio into TX 1 so we need to take a look at UART 1 now you want to make sure this is turned off and this is turned off this is disabled this is also disabled and we want to go to peripherals and this is where you find TBS smart audio this is what we want here now if you had the IRC Tramp protocol rarely you can see those VT X's but that's where you'd want to go they have some other things also but we're not going to get into those this is what you want to look for you want to click on that and now if you go ahead and try everything out it won't work because you still need to save so we would save save and reboot and now everything should be working so we're gonna just reconnect again and just double check it so yes v TX TBS smart audio it's off off disabled disabled and there it is under peripherals now let's connect a screen and take a look at how we would control this so before we do this step this is from the future you're gonna hear some noise coming in the microphone from the controller because the antenna was right under the microphone once I move it then that noise will go away and I do apologize for that I didn't know that was gonna happen so carry on all right so now everything should be configured as you can tell I've removed the USB now I'm going to apply power so the VTX will move it up so here I'm pretending like I've plugged in the battery and everything should power up so here we see that the VTX did power up and all it's gonna be difficult but we are on a1 currently so here's a one and we do have our antenna which is really important now I remember when I told you if there's no camera there's no signal you'll get a block image well this means that the v-tex is working but the camera isn't well because obviously I don't have a camera connected if I were to come in and plug in the camera we would have video feed but for the sake of this tutorial we'll not gonna do that and I'm going to show you how to enter the menu and change the settings so what you'd want to do is you want to grab your controller here and you want to bring up your throttle make sure obviously you're disarmed y'all to the left and then press up and then you see here we just got a menu and now we'll be able to use the right joystick in order to switch with this so I'm gonna use this right here and scroll down to features and whatever I want to select then I'd go to the right and then you enter this menu here now you want to go to VTX si which means v TX smart audio we're gonna go to the right and now we can see we can switch the channel from a1 see here's a there's one and then that also gives us our power which is our output power that whatever we want broadcast out as you can tell right here so right now it's on a 1 I'm gonna change it to a 2 so we're gonna go to band or there we go we're just gonna say 2 here so now we're on a and if you see if you take a look here I'm switching the band and we can see the our band the F band the e band the B band and a so we're going to have it be a 2 and then the power I'm going to keep it 25 milliwatts you can change this to whatever the maximum is of your VTX and then if i click set now confirm we should lose video signal why because look now that changed to a 2 so we can see a and then 2 so if we switch the channel to a 2 we get our video feedback kind of alright and then now we get our video feedback since now we are on a two on the goggle also now sometimes if you power it off here it won't save and it'll come back to a 1 so you want to go to back and then scroll back down go to back again and you can say save and exit and that's it now it's save every time it boots it'll always be on a 2 so I really hope that was useful to someone and again just to show you how to access the menu you put your throttle to the center and then y'all to the left and then push up once and then you would enter that menu and then you just use this to scroll down up and enter would be you know like you're going into the menu to the right here so we can go down and there's features we go right there's v TX smart audio and then we can start doing our modifications now and again not all V T X's have smart audio but the ones that do you should try to utilize it because anyways you paid for the extra feature and it's really great to have in tight pickles or in tight situations especially if you have your v TX set up in a way that you can't reach also I have link to some great V T X's down below from budget to what I think is some of the best VT axes they're all within like 20 dollars of range and does some great antennas as well that I've used through abandoned buildings and a lot of interference which have proven to be really really great for example such as this one right here that's get included for this video guys I really hope you guys enjoyed it and if you do like this content let me know down in the comment section also do you have a patreon if it was useful or it did help you connect your quad up let me know and what do you guys want to see what is also missing I'll let me know and I'll cover it for you and I'll see you next one guys peace out

–Video Transmitters
MMCX Great Antennas:
Premium VTX:
Budget VTX:
Mid Range VTX:
The Screen I used:

–Flight Controllers
Mamba F722 Combo:
Mamba F405 Budget:
Best Beginner Premium Combo :
Premium Stack:

Consider Following me and supporting on Patreon.

— TOP 30×30 4in1 ESC —

Aikon AK32

Tekko32 Metal

T-Motor F55A

T-Motor F45A

Dalrc Rocket

— Best 20×20 4in1 ESC In Order From Best —
HGLRC Forward

Aikon AK32 Mini

Airbot Ori32

Need Help with something?

Make sure to sign up to the newsletter and create an account to not miss big insane sales.

Android APP


Follow me on Facebook


I highly recommend these products if unsure


kakuteV2 AIO

Hakcrc (Best Budget ESC)

25km Range on these awesome VTX’s



The HEX driver I recommended which i bought 2 sets of (Must have if your into building)

Batteries I use

Camera I use

Standoffs I find to be the best

Xt60 Premade I use

Heat shrink I mentioned

Soldering station

Contact: [email protected]

Song Used


Song Used info
Track was provided by NoCopyrightSounds

Paul Flint – Savage [NCS Release]

Paul Flint

• Mastering by

Song: Distrion & Alex Skrindo – Lightning [NCS Release]
Music provided by NoCopyrightSounds.

ID: dj2938hd298hflahsknckdfhsidufh9398

24 comments on “FPV Beginner Guide P2 // HOW TO WIRE & SETUP VTX WITH SMART AUDIO GUIDE 2019

  1. PS Aerial

    Great videos!

    Do you also have tbs crossfire setups?
    I have a multiple nano’s. I wired one of my quads in a similar way once, and I was able to control my vtx though my tbs module behind my taranis once and adjust my rates. by the way any videos on rate adjustments?
    I enjoy watching your videos also my baby niece loves your into song by the way 🤙 and thanks for recommending the dalrc f722 with 50 amp esc’s, flies gtreat on my marmotte, wish it had a barometer, was thinking of the matek f7, but really don’t need memory card adapter.

    keep up the great videos!

  2. ChristianProgrammer

    Man Its TOO bad your over seas from the US . Theres a market for Hey mr tech guy is this 4 in 1 ESC beyond help, or hey mr tech guy is this flight controller completely dead. Granted its nickle and dime and probablly stress, but there is assuredly a market for it. I've seen your videos on testing FETs . but I wouldn't do it myself .

  3. ChristianProgrammer

    Bro EVERY TIME I set up Smart Audio and properly configure it I might add, the TBS unify VTX will stop obeying and will no longer allow access to unlocked mode . Its been a while but even TBS Support instructed that I just unhook the Smart Audio cable to fix my issues and that always worked .. What we really want to know is how do we get MAXIMUM Awesome Video signal.

    Dont have long motor wires.. ?? Dont braid your motor wires ?? Use SHielded connections for video wire VTX to FC ?
    Use a power option from the HUB or FC that uses the bec or not used the bec. select a ground closest to where you get power from ????? WHAT WHAT WHAT ?! ?!?!

    I just did this [images linked] last night and the night previous https://www.fpvbook.com/photo/3792/desperation-cap-04/ https://www.fpvbook.com/photo/3789/desperation-cap-02/ because I have heard forever that if a big Cap on the Pigtail isnt enough go this route in addition, Admittedly its much better but not EPIC .. Even lost video once or twice as I tested it out this afternoon.

  4. Flying Wolf

    Great video man! You should go even deeper and let us know how to connect those wires in order to avoid things like failsafes or electrical noise, cause this is a very important and ugly part in fpv 😤🧐 thank you for your work and keep it up!

  5. Arttu Marttinen

    Fun how i just started fpv about a month ago and it was very hard to find information. now youtube is full of "beginners guides" from popular channels. But nice and helpful video anyways thank you.

  6. Collins Njarara

    Awesome video and great detail please do more of this videos they are very helpful to beginners. Do a tutorial video of how to wire different recivers like tbs nano and micro reciver . Thank you for providing the links to the items you use.

  7. Arjun C.A

    Waiting for the part 2 of building FPV drone, the video ended with a heads up for part 2. Planning a build based on this bro.
    Thank you for all the support 🙂


Leave a Reply

Your email address will not be published. Required fields are marked *