AV-Sync Installation video

To give you a good impression on how to add an AV-Sync stop in your tour, we have made a short video. It briefly takes you through the steps; how to prepare the video, what to do in the Toureditor and how to connect the hardware. Detailed information can of course be found in the AV-Sync IDentifier articles on this helppage.

Mobile Website Friendly name and QR Code

The Podcatcher Portal allows you to download a QR Code you can print and put somewhere in your museum. This enables visitors to quickly enjoy your tour online, without requiring IDentifiers or other hardware.

Further, you can use a “friendly” name instead of the generated Mobile Website code. This means you can refer to the Mobile Website using your museum’s name instead of the code, if you wish.

You can find the controls on the Manage Site page:

Note that you can download QR codes for your museum as a whole (on the Site page), for a specific tour (on the Tour – General page) or a stop (on the Stop – General page). However, you can only enter a friendly name for your museum.

AV-Sync Testmode

The AV-Sync Testmode is a Podcatcher mode which gives acces to 2 AV-Sync specific features to setup your AV-Sync clips. The mode is used for the following cases:

  • To determine the desired AV-Sync offset
  • Measure an estimate for the AV-Sync loopdelay.

Note: when you are already content with the synchronization between the Podcatcher audio and the video, you do not require these features.

Usage

The AV-Sync testmode is activated by removing the Podcatcher from the dock whilst holding the middle and right buttons. The testmode is recognised by the yellow led which blinks together with the green led when a tour is started.

AV-Sync offset

The AV-Sync offset is used to adjust the synchronization between the Podcatcher audio and the video by playing the audio a fraction earlier or later.

The following instructions explain how the testmode is used to determine the desired AV-Sync offset value.

  1. Aim the Podcatcher, in AV-Sync testmode, at the AV-Sync IDentifier.
  2. Use the left and right buttons to in- or decrease the AV-Sync offset on the Podcatcher. After every press the value is pronounced* .When pressing the middle button the value is reset to 0.
  3. Re-aim the Podcatcher to the AV-Sync IDentifier. The audio will now be played with the selected AV-Sync offset. Notice the red led which indicated the audio is played with an offset.
  4. Repeat from step 2 until you are happy with the synchronization.
  5. Press the middle button while audio is playing to pronounce the last used offset value. Enter this value as AV-Sync offset for this AV-Sync clip.

* Minus is pronounced as “Foxtrot”

AV-Sync loopdelay

With the AV-Sync loopdelay the audio can be brought back in sync after a loop, by delaying the audio.

The following instruction explain how the AV-Sync testmode is used to make an estimate for the desired loopdelay value.

  1. Aim the Podcatcher, in AV-Sync testmode, at the AV-Sync IDentifier.
  2. Await the video loop and aim at the AV-Sync IDentifier again around 10 seconds in the video.
  3. The Podcatcher will pronounce an estimate of the desired loopdelay value. Enter this value as AV-Sync loopdelay for this AV-Sync clip.

Due technical limitations the Podcatcher cannot determine the exact value. Try the following to make a better estimate of the required value:

  • Await multiple video loops before the 2nd scan of the AV-Sync IDentifier, and divide the pronounced value by the amount of loops.
  • Perform multiple measurements and take the average.
  • Test the synchronization after setting the loopdelay, publishing and syncing. Adjust the value with little steps in case you are not yet happy with the synchonization.

Note: PC’s do not have a constant loop time when used for video playback. Use a dedicated media player for constant video looping.

MapMyVisit – Mobile Website

Mobile Website

Our new Mobile Website has been devised to give visitors the opportunity, in addition to the Podcatchers in the museum, to follow the audio tour online via their own mobile device, such as a mobile phone.

How does it work for the visitor?

By means of a QR code or a link to the Mobile Website: https://mapmyvisit.com/listen and entering your unique code there, the visitor can download and listen to the tour. This is done quickly and user-friendly!

User-friendly for deaf and hard of hearing visitors

Because text and images are displayed in the tour via the Mobile Website, it is also user-friendly for deaf and hard-of-hearing visitors.

How does it work for you as a customer to install this?

This is very simple! The tour is already ready for the Podcatchers in the Portal, so this is easy to activate for the Mobile Website. The Mobile Website also shows images and text, so if this is not already included in the tour, you can easily add it. How to do this is explained below.

How do I prepare my Tour for the Mobile Website?

As we indicate above, you can make the audio tour available via the Mobile Website in the Portal. You can do this by:

  • Go to the Tour editor in the Portal
  • Select the tour you want to use for the Mobile Website here
  • Open the tab: “General”
  • Check “Mobile Website”
  • And click “Save” at the bottom

Enable stops for the Mobile Tour

Now you can choose which stops you want to use for the Mobile Tour. To do this, go to:

  • “Stop list” in the tour
  • Click on the globe icon at each stop and set the availability

What should the stops have?

The Mobile Website shows images and possibly text. In this way, the visitor knows, for example, which painting or object the audio fragment belongs to.

For the tour itself it is possible to add an image and a logo. Visitors will see this when they open the Mobile Website.

You can add an image per stop, but also a description. This is possible per language. This way, all visitors can follow the online tour in different languages.

  • For the ultimate experience, we therefore recommend per stop:
  • Add an audio file (required)
  • Adding an image, so that visitors have an image with the audio clip.
  • Add text. For example, deaf and hard of hearing visitors can also follow the tour.

Where can I find my unique code?

A unique site code is available for you in the Portal. Proceed to:

To go to https://portal.guideid.com/ and log in, you can then click on “Manage site” then choose: “Mobile Audio Tour Web App”

You will then see the following in the Portal

This is the unique site code that can be entered by the visitor to download and then follow the tour.

Can I choose my own code?

The code is unique and therefore cannot be modified.

How do I create a unique QR code?

If you want a QR code to hang at the entrance or to place on your own website, you can create it via: https://www.qrcode-monkey.com This is a free tool. By typing here the link to the Mobile Website including the unique code, a unique QR code is created.

  • Enter the URL with your unique code behind it: mapmyvisit.com/listen/ (your unique code)
  • Choose: “Create QR Code” *
  • Then choose: “Download PNG”
  • The unique QR code has now been created and can be displayed at the start of the tour or posted on the website.

* We recommend to leave the color of the QR code black.

The numerical IDentifier

The stops in the Tour are displayed in the same order as the Tour editor in the Portal, but it is also possible to set a numerical trigger for each stop. This allows you to determine the correct order on the Mobile Website. To use this function, go in the Portal to:

  • “Triggers”
  • “Add”
  • “Show more”
  • “Numeric (Apps)
  • “Next>”

Here you can enter the number for the stop:

Repeat these steps for each stop.

You are ready!

The tour is now completely ready for the visitors!

Do not forget to post the unique QR code or the link with the unique code from the Portal at the entrance.

Have fun offering the audio tour via the Mobile Website!

MapMyVisit – App

Overview

Guide-ID offers its customers a new and improved App, called the MapMyVisit App. This is a Bring Your Own Device (BYOD) alternative to the Podcatcher. The App has been designed with the Podcatcher experience in mind, so a lot of it is comparable in functionality. The App uses Bluetooth Low Energy (BLE) technology built into the new Bluetooth IDentifiers. These IDentifiers can be used to trigger both Podcatcher and the App. Usage data is logged, processed, and finally displayed in the Analytics section of the Portal.

How the App works

The MapMyVisit App can be downloaded free of charge by your visitors and is installed from either the Google Play Store for Android or the Apple App Store for Apple devices. Installing the App can be done from home or when present at the museum. On arrival at the museum, the visitors unlock and start the tour at the IDentifier starting point. It is also possible to start in the middle of a tour and use the App to select both the language and tour. But off course make sure the museum has our new Bluetooth IDentifiers available on site for the visitors to scan!

Note, the MapMyVisit App supports the following content/trigger types:

  • Normal audio stops
  • A/B/C-stops
  • Autostart
  • Sign language stops (video content)
  • Streaming audio by using an active internet connection
  • The MapMyVisit-App only supports Bluetooth-capable IDentifiers. 

Getting the Tour ready in the Portal

Building a tour for the App works the same as making one for the Podcatcher. You need 1 Start IDentifier for each language (to start the tour) and 1 Object IDentifier for every stop. IDentifiers you add to stops can also be used by the Podcatchers, as they both support Bluetooth and infrared. Follow the next steps to get it ready:

First, make the tour available on the MapMyVisit-App. Do so by ticking the box on the Tour General screen and click save. If you start fresh and create a new tour you can do so in the “add tour” popup. 

Second, decide which stops you want to have available in the App. Stops can be identified at a glance in the Stops list. Clicking on this icon will also take you to the Stop General screen, where you can toggle the App availability on or off.

Start at any IDentifier

By offering the app it is possible to start a tour without scanning a Start-IDentifier. If enabled, visitors can start an audio tour even when they already entered the site and noticed other visitors enjoying the tour. To make this work; ticking the box on the Tour General screen and click save. Note, for each language there still needs to be a Start-IDentifier connected.

Sign language tours

A Sign Language tour is a video-only (no audio!) tour. It is intended to help hearing-impaired visitors enjoy the museum to its fullest. 

Follow the next steps to get it ready:
First, make sure the tour you are going or have created is available on the app. Do so by ticking the box on the Tour General screen and click save.
Then, add a Start IDentifier and connect it specifically to the sign language tour, see image below.

Thereafter, you are able to upload your video. You can do this in the same place where you upload audio. Note, only the video will be played in the app. audio will be stripped from the file.

Skin upload (site specific image)

You can brand the MapMyVisit-App for visitors visiting your site. You can upload a site-specific image in the portal which will be displayed as the background of the App. In the portal go to Manage site and open de Images tab.

Promoting the App to your visitors

To be able to promote the App to your visitors you can guide them to the stores or you can offer to scan a QR code for Android and IOS

We also made a leaflet which you can download and use to explains to your visitors how the App works.

Installation video

We have made a video in which we show you how to add the newly received IDentifiers to your new tour and how to install the setup with loose, new Dockingstations and a Syncbox.

Specsheet Syncbox

The Syncbox is a compact computer, designed by Guide ID to charge and synchronize Podcatcher audio guides. You can connect up to 10 dockingstations (100 Podcatchers) to one Syncbox.

Specsheets:

Syncbox advanced network configuration

1. Wireless LAN (WiFi)

We recommend using a wired network connection whenever available. In cases where it isn’t, but you have a WiFi network available, you can connect the Syncbox to it using a USB WiFi dongle.

Only specific types of dongles are supported, so please contact our helpdesk if you are in need of one. Configuration must be repeated for each USB dongle. If you have more than one Syncbox, you may be provided with a WiFi access point instead, to simplify the configuration and provide the best reception.

1.1. USB WiFi dongle

Connecting the Syncbox to WiFi using a USB dongle is an easy one-time process. Follow the steps below.

1. Insert the USB dongle into the front USB port that is below the Ethernet port, and startup you Syncbox.
Note: Do not use any of the 10 USB ports on the rear of the Syncbox for the WiFi dongle. The device will not be found.

Step 1: Connect the WiFi dongle

2. Wait for about 2 minutes, until the connection LED starts flashing red. This indicates that the Syncbox has started a WiFi hotspot.

3. Search for WiFi networks on you phone (or another WiFi capable device). Select the network named after the label on you Syncbox, and connect to it. The WiFi password is “podcatcher”.

4. When you are connected to the hotspot, a popup should be shown: “Sign in to network”. Click on it to open the WiFi configuration page.

5. Select your WiFi network from the drop down list. Enter the passphrase, and click “Connect”. The WiFi hotspot will be disabled, and the Syncbox will connect to your WiFi network.

To check if the connection is succesfull, observe the connection LED. The LED should be blinking orange, and become green after about one minute. If there is an error connecting to the WiFi network, the LED will return to blinking red and the hotspot will be restarted. You can then go back to step 3.

1.2. WiFi access point

Instead of using a WiFi dongle for each Syncbox, it is possible to use an access point in client mode to connect many Syncboxes to your wireless network at once. The Syncboxes connect to the access point by means of Ethernet cables, and the access point is configured to connect to your wireless network. To help plan your setup, please contact our helpdesk.

Configuration using a WiFi access point is similar to the procedure for connecting a single USB dongle. But, you will only have to configure the access point.

2. Proxy server

On some locations it is required to access the internet through a proxy server. The Syncbox supports proxy servers through automatic and manual configuration. There are however some requirements on the type of proxy server used.

2.1. Proxy server requirements

Your proxy server must meet the following requirements:

  1. Support HTTPS connections to websites. Or in technical terms: support the HTTP CONNECT method, where the proxy server sets up a direct connection between the client and the website.
    As most websites today use HTTPS, most proxy servers support this feature. Some proxy servers however require clients to install a special certificate, instead of using HTTP CONNECT. This is currently not supported by the Syncbox.
  2. If your proxy server requires entering a username and password to access the internet, this is supported by the Syncbox, but currently only through the HTTP basic authentication scheme. Other existing types (e.g. HTTP Digest, HTTP NTLM and HTTP Negotiate) are currently not supported.

2.2. Automatic configuration (WPAD)

The Syncbox supports automatic configuration of a proxy server by means of the Web Proxy Auto-Discovery Protocol (WPAD). If your network is configured to support this, proxy server configuration of the Syncbox is done automatically and will work out of the box.

For more information on WPAD follow this link.

If your proxy server requires entering a username and password to access the internet, automatic configuration will normally not provide the Syncbox with these credentials. To enter them you would need to resort to manual configuration. As an alternative you can include the credentials in the the proxy URL in the PAC file. An example PAC file in this format is shown below.

function FindProxyForURL(url, host)
{
return "PROXY username:password@192.168.1.1:8080; DIRECT";
}

Note: Including the username and password for the proxy server in the PAC file will make it available to all users on the network, unless access to the PAC file is regulated by for instance IP address. The MAC address of the Syncbox is printed on its label to allow to assigning it a specific IP address.

3. Manual configuration

Manual configuration of Syncbox network settings is possible using a USB mass storage device. Please follow the steps below.

3.1. Prepare the USB stick

  1. Format a USB stick in FAT format.
  2. Create a new text file on it named “config”. The file must not be placed within a directory.
  3. Add configuration entries to the file as specified below.

3.2. Network configuration entries

The configuration file “config” can contain a combination of the following configuration entries, each on a separate line.

3.2.1. General

Clear all network profiles
config_net_reset=1

Note: The reset can be combined with other entries and will be handled first.

3.2.2. Wireless LAN

WiFi ssid to apply settings to (if omitted, configure Ethernet)
config_net_wifi_ssid=My WiFi Network


WiFi password to install
config_net_wifi_pass=password


WiFi auth-alg:
– open: Open System
– shared: Shared Key
config_net_wifi_auth=open


WiFi key management:
– none: WEP
– ieee8021x: Dynamic WEP
– wpa-psk: infrastructure WPA-PSK
– sae: SAE
– wpa-eap: WPA-Enterprise
config_net_wifi_mgmt=wpa-psk

3.2.3. Proxy server

Note: Proxy configuration applies to wired Ethernet, unless it is combined with wireless LAN configuration entries. To manually configure a proxy server for WiFi, you must also manually configure the WiFi settings. If you have already used the hotspot method to configure WiFi, you must clear the existing profile using the reset option listed above.

Proxy server host
config_net_proxy_host=192.168.1.1


Proxy server port
config_net_proxy_port=8080


Proxy server username
config_net_proxy_user=username


Proxy server password
config_net_proxy_pass=password

3.3. Apply settings on a Syncbox

Using the following steps you can apply the configuration to a Syncbox. You can repeat these steps on multiple Syncboxes, using the same USB stick.

  1. Power off the Syncbox, by holding the “Shutdown” button 10 seconds until the system LED starts blinking orange and finally switches off.
  2. Insert the USB stick into the front USB port below the Ethernet connector.
    Note: Do not use any of the 10 USB ports on the rear of the Syncbox for the USB stick. The device will not be found.
  3. Press and hold the “Shutdown” button for 10 seconds to start it in recovery mode. The Syncbox should apply the settings, and automatically reboot to normal mode.
    Note 1: Release the button when the system LED becomes orange. If you hold it too long it becomes red and will start in a different mode.
    Note 2: If applying the settings failed or no settings were applied, the Syncbox will stay in recovery mode and the system LED will stay red. In this case check the USB device, and restart at step 1 to retry.

AV-Sync media file preparation

1. General

Two steps are required to prepare your video for use with AV-Sync:

  1. Prepare the video file (replace the audio with the AV-Sync track). The video file will play on your mediaplayer.
  2. Prepare the audio file (split off the audio from the video to a MP3 file). The audio file will be uploaded in the TourEditor to be played on the Podcatcher.

Creating these files is an automatic process when using the video tool.

For more information on the usage of the tool, or for detailed instructions on how to do the media file preparation manually, please refer to the following sections.

2. AV-Sync video tool

The easiest way to prepare you media files is by using the AV-Sync video tool. You can download it here:

https://help.guideid.com/downloads/AV-Sync_Video_Tool_0.3.exe

Note: When opening the program, you may see the message “Windows protected your PC”. Please click the link “More info” and then the button “Run anyway” to continue.

You can drag and drop any video on the tool, and it will create two new files in the same directory as the input file:

  1. <inputfilename>_video.mp4
  2. <inputfilename>_audio.mp3

The video file is to be placed on your mediaplayer. The audio file is to be uploaded in the TourEditor, to play on the Podcatchers.

2.1. Advanced video settings

If the advanced checkbox has not been selected, the video tool will use settings that suit most cases. If it has been selected, the following video options are available:

  • Convert: This checkbox enables conversion of the video. When unchecked, the video content is ‘multiplexed’ into the output file unmodified. This means that video resolution and quality will remain unchanged. When checked, video is transcoded to the h264 codec. Note that conversion may be automatically enabled, if your video is encoded using a video codec that is not supported in MP4 files. If so, the progress will indicate “Converting video”.
  • Flexcode: This checkbox enables the IDentifier code input field to be used for flexible mode AV-Sync videos. Please refer to the AV-Sync manual for details.
  • Room audio: If unchecked, the output video will contain the AV-Sync track instead of the original audio. If checked, the original audio is converted to a single channel and added to the output video as well. The output video will contain a stereo audio track, with the AV-Sync track on the right, and the original audio on the left channel. This makes it possible to still play the original audio in the room with the video, in addition to hearing the audio on the Podcatchers.

2.2. Advanced audio settings

If the advanced checkbox has not been selected, the video tool will use settings that suit most cases. If it has been selected, the following audio options are available:

  • Bitrate: Choose the bitrate for the audio to be played on the Podcatchers. Note that a higher bitrate improves the quality, but also the time required to sync the Podcatchers. We advice a bitrate of 64k for mono, and 128k for stereo. If left to auto, the encoder uses the input file to choose the best bitrate for you.
  • Channels: Choose the amount of channels for the audio to be played on the Podcatchers. If the input file contains stereo audio, you may choose to reduce it to mono. This way the bitrate can be reduced, reducing the sync time per Podcatcher. Using stereo is advised when using headphones.
  • Extend: This input field allows extending the audio file with silence for the specified time. This could be used for loop correction, however preferably use the slider in the tour editor to configure this: see “Fine tuning” in the AV-Sync manual.

3. Manual method

To manually prepare you media files, the use of video editing software is required. Please refer to the software’s user manual to determine how to execute the following steps.

3.1. Basic

The following steps are required for normal usage of AV-Sync.

  1. Save the original video
    Save the original video that is to played to an easy to access location on your hard drive.
  2. De-mux (split) the audio track from the video, and save it in MP3 format (64 kbps, mono, 48 kHz, -1dB peak level)
    • Split the audio that is to be played by the Podcatcher from the original video
      • Download Avidemux (or any other software you would like to use).
      • Open the video file.
      • Choose “Save audio” from the “Audio” menu.
      • Browse to a location on your hard drive to save the audio file. Choose a file name like “MyAVSyncClip.m4a”.
    • Prepare the MP3 file for playback on the Podcatcher
      • Download Audacity (or any other software you would like to use).
      • Open the audio file you have saved in the previous step.
      • Make the sure that the “Project Rate” as visible in the lower left of the screen is set to 48000 Hz.
      • If required, amplify the track to an appropriate volume level. We recommend -1dB peak level.
        • Choose “All” from the “Select” menu.
        • Choose “Amplify” from the “Effect” menu.
        • Enter the new peak amplitude: -1
        • Click “OK”.
      • Optionally, extend the audio track for loop correction. However preferably use the slider in the tour editor to configure this: see “Fine tuning” in the AV-Sync manual.
        • Scroll right and click on the end of the track, where a yellow line will appear.
        • Choose “Silence..” from the “Generate” menu.
        • Adjust the duration of the silence to the measured loop time (the time the media player requires to restart the video) and choose “OK”.
      • Export the file in MP3 format, without ID3 tags.
        • Choose “Export” -> “Export as MP3” from the “File” menu.
        • Select “Constant” at the format options.
        • Adjust the quality to one of the recommended formats:
          • 64 kbps, Mono
          • 128 kbps, Stereo
        • Click “Save”.
        • Browse to a location on your hard drive to save the audio file. Choose a file name like “MyAVSyncClip.mp3”.
        • At the window “Edit Metadata Tags” choose “Clear” to remove all metadata.
        • Click “OK”.
    • The MP3 file is now ready to be uploaded in the TourEditor.
  3. Download the AV-Sync track
    • The regular AV-Sync track can be downloaded as a zipped WAV-file from this link to a known location on your computer.
    • Unzip the file: click right mouse button, choose “Extract all..”
    • When using the AV-sync in flexible mode, multiple, different AV-Sync tracks are required. You can ask our helpdesk for more information.
  4. Mux (add) the AV-Sync track to the original video
    • The AV-Sync track is provided in WAV format, which provides the best signal quality to the AV-Sync box. The audio content of the track must not be altered in any way for the system to function. We recommend not converting the AV-Sync track to a different format if not required. However for many video formats, the MP3 or AAC format is more standard to use as audio track. Conversion to these formats is no problem, as long as the bitrate is set high enough to prevent signal degradation. As a guideline, use 128 kbps or higher for AAC, or 192 kbps for MP3. Conversion can be done using editing software of your choice. This section provides an example using Audacity and Avidemux.
    • Optionally convert the AV-Sync track to MP3 format, for muxing with video in MP4 format.
      • Download Audacity (or any other software you would like to use).
      • Open the AV-Sync track.
      • Export the file in MP3 format.
        1. Choose “Export” -> “Export as MP3” from the “File” menu.
        2. Select “Constant” at the format options.
        3. Adjust the quality to 192 kbps or higher.
        4. Select “Mono” as channel mode.
        5. Click “Save”.
        6. Browse to a location on your hard drive to save the audio file. Choose a file name like “AVSyncTrack.mp3”.
        7. Click “OK”.
    • Add the AV-Sync track to the video. Make sure that both video and audio start at offset 0. Also make sure that the AV-Sync track is cut short when the video ends. The full original AV-Sync track has a fixed length of 2 hours.
      • Download Avidemux (or any other software you would like to use).
      • Open the video file.
      • Choose “Select track” from the “Audio” menu.
      • Select “Track 0 from.. “, choose option “Add audio track” when it appears.
      • Browse to the location of the AV-Sync track on your hard drive and open it.
      • Click “OK”.
      • Select “MP4 Muxer” as Output format.
        • Note: Using “MP4v2 Muxer” may cause problems when using Brightsign media players.
      • Click “Save” from the “File” menu.
      • Save the new video to an easy to access location on your computer using a new name. This video file is to be used for playback on the media player connected to the AV-Sync box.

3.2. Advanced

This section describes optional steps for more advanced AV-Sync setups.

  1. Play audio on speakers (room audio), in sync with audio played on Podcatchers.
    • This step is required if audio must be played not only on the Podcatchers, but also directly from the media player. This is the case if the use of audio guides is optional, for instance to allow listening in a different language.
    • You can skip this step if all audio is to be played through the Podcatcher.
    • Normally, for use of AV-Sync the audio track played by the media player is replaced by the AV-Sync track. The AV-Sync track requires only a single channel. You can use the other channel to play room audio. For this, the left channel of the original audio of the video must be added as the left channel to the AV-Sync track, making it stereo. This makes original audio available on the white RCA connector of the audio cable from the media player, which is normally unconnected. The AV-Sync track must remain on the right (as in, opposite of left) channel of the track, which should be output on the red RCA connector which is connected to the AV-Sync box.
    • Download Audacity (or any other software you would like to use).
    • Open the AV-Sync track.
    • Choose “Import” -> “Audio” from the “File” menu
    • Browse to the audio file that you have split from the original video (for example: “MyAVSyncClip.m4a”). Two audio files are now opened, both having two channels (stereo). These need to be merged to a single stereo audio file.
    • Click on the label “AV Sync Track” to open a menu. From it, choose, “Split Stereo Track”.
    • Click on the label of the audio file from the original video and do the same.
    • Remove the empty left channel of the AV Sync track by clicking the X mark.
    • Remove the right channel of the audio file from the video by clicking the X mark.
    • Click on the label “AV Sync Track” to open a menu. From it, choose, “Make Stereo Track”. The two remaining mono tracks now form a single stereo track.
    • Export the file in MP3 format.
      1. Choose “Export” -> “Export as MP3” from the “File” menu.
      2. Select “Constant” at the format options.
      3. Adjust the quality to 192 kbps or higher.
      4. Select “Stereo” as channel mode.
      5. Click “Save”.
      6. Browse to a location on your hard drive to save the audio file. Choose a file name like “AVSyncTrackWithRoomAudio.mp3”.
      7. Click “OK”.
    • Continue at the step “Add the AV-Sync track to the video” as described above.