Prosim Intercom


3. May 2020 by Peter

This is going to be a very long post. It’s mainly a guide for people who want to use the Prosim Audio program for intercom and communication with vPilot and VATSIM.

The good thing about the Prosim intercom system is that of the software based where as my old system was hardware-based. Hardware means a lot of wires and a of wires can result a lot of noise and loss of quality, whereas with software you get a much better sound.

It took me some days to set up the intercom system and so here is a guide of how I did. I hope that could be of help to other people using Prosim and wanting to try out the intercom system It’s a bit of a long read. There is a video that covers the same. But if you want making attempting an intercom it might be worth just going through this page.

Read below or watch this marathon video (28 minutes)

Intercom video

Setting up Prosim Intercom

You must focus on 5 things:
* Configure sound devices
* Configure Prosim Audio
* Setting up Prosim Audio
* Setup Prosim Audio
* Configure Prosim

Configure sound devices

For each input output you have connected to your computers you need a separate soundcard. Your computer already comes with one sound card (The jack plugs on the front/back of your computer). If you want additional things connected to the computer, you need additional soundcards. They are pretty easy to find on eBay just search for USB soundcard and they should be around $5 each. So if you have a headset and the handheld microphone connected to my computer you need at least one USB soundcard.

In case you already use the speakers on you computer, you of course then will need two usb soundcards. One for your headset and one for your handheld mic.

Also native that a USB headset acts like a soundcard on its own.

Configure Prosim Audio

Once your units are connected it is time to configure Prosim Audio.

In the config-tab you must select which audio units are in use and what is attached to that unit. On my two computers it looks like this:

Prosim Audion configuration with Headset, speakers, handheld and ATC (VHF1)

On the first officer side you can see I have a headset connected via USB sound card and a handheld microphone connected directly to the computer. On the captains side I also have a headset and a handheld microphone so for that part of the configuration is the same – except for that VB-calbe. That is covered in the section “Connecting to VATSIM”

Once you have connected everything you can test your set up on that specific computer by pushing the intercom test button this will allow you to listen to input from all the microphone is connected to that computer. This could be a good source for trials and errors to begin with so that you are absolutely sure that one computer is working properly.

Setting up Prosim Audio

Then it’s time to start configuring Prosim Audio. You need one instance of Prosim Audio for each side of your cockpit. As you are making an intercom I guess you have at least two sides – Captain and First Officer. In that case you need 2 instances of Prosim Audio. I recommend that you have 1 instance on each computer. So if you have captain side and the first officer side. I recommend you use 2 computers

On each computer you click which station this instance of Prosim Audio belongs to / What signal is being transmitted. This is done on the first three lines. You can choose between Captain NAV / First Officer NAV / observer NAV.

On the lines below you click what sources do you want to listen to – not what is transmitted to the intercom system! In the pictures below I’m listening to both captain and first officer headset and handheld microphone. That means that the captain is actually hearing himself in the head said when he speaks into the boom microphone. Of course at some point you should unclick the CPT boom + handheld on the captains side and vise versa for the F/O side. Apart from that the set up is pretty straightforward.

First 3 lines indicated what is transmitted. The rest is what you would like to hear.

Prosim configuration

Now turning to the Prosim configuration there is a few things that you need to configure.

You need to configure the push to talk button is both for the radio on the yoke and for the handheld microphone. There is also a ptt switch called “IC”. This is Push-to-talk switch intercom. You can choose to set them as [always on]. If you do so “Hot Mike” which means that whatever is said in the headset is always transmitted to the other part. If you choose to configure the IC switch then you need to push that switch in the cockpit in order to transmit a signal to the other person in the cockpit.

That is it. No more configuration needed. 🙂

If you have Audio Selector Panels (ASP) in your pedestal you should make sure the ASP is properly configured.

I do not have an ASP so I have configured a few additional switches in Prosim. The mosAimportant one is the “Normal” switch. You should set it to [Always on] in the prosim Configuration. Just search for “Normal” if you do not have an audio selector panel.

If you want to use speakers you need to configure the speaker button on the audio select panel. Be aware that the speaker button not is incorporated in the app Prosim Panel, so you need to find a switch in your cockpit or just set it to [always on]. That will give you the ATC in the speakers in the cockpit.

Connecting to VATSIM / External ATC chatter

If you use VATSIM you also need to install something called a virtual cable. It can be downloaded of the interwebs. Just Google it. I found a donationware version called VB-calbe. Once installed it acts like an audio cable input/output inside your computer.

In the captains instance of Prosim Audio open the configuration and add VHF1 in both input and output. As device select the virtual cable.

vPilot configuration

In order to use the intercom with vPilot you must also configure the audio in vPilot. It must be set with the virtual cable. This way the signal from / to vPilot is transferred via the virtual cable to/from the VHF1 radio in Prosim.

Now you are almost ready in order to listen to the air-traffic controller you need to select VHF1 on your audio select panel.


It took a lot of time for me to figure out how to do this. It’s actually not that difficult once you understand the logic. But it’s a steep learning curve to begin with

I really hope this guide could be of help to you.

One thought on “Prosim Intercom

  1. 737DIYSIM says:

    Hi Peter,

    That was great read! Will follow along for my sim. I hope this find sd you well.

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