System requirements

no installation necessary, doozzoo works in the browser


Device and browser:

  • Laptop or desktop computer (recommended)
    • recommended browsers: Google Chrome or Mozilla Firefox
  • Android Tablet 
    • Chrome browser
  • iPad (with latest iPadOS)
    • Safari (recommended) or Chrome Browser

Note: Some features may be limited under Safari.


other requirements:

  • Camera (internal or external)
  • Microphone (internal or external)
  • Headphones (recommended for best sound)



Preparations and start

  • Before opening the browser, please close all other programs or apps that may have access to the camera or microphone, such as Zoom or Skype.
  • For safety, select the microphone and speaker/headphone jack you want to use in your system settings.
  • Open the browser.
  • Visit app.doozzoo.com
  • If you are not already logged in, log in with your login information (email and password). If you forgot your password, you can reset it by clicking 'Forgot password'.
  • Open the 'Pre session check' in the lower blue menu.
  • Select the microphone input you want to use.
  • Make sure that the headphone mode is selected. If you are not using headphones, select speaker mode instead.
  • As a coach, you start your classroom by clicking the big blue 'Start Session' button.
  • As a student, you can find your available coaches under the 'Coaches' menu item and join their room.



Troubleshooting

"The session does not start." / "I can't connect."

  • Reload the page using the corresponding icon in your browser's address bar.
  • Reload the page while holding down the Shift key using the corresponding icon in your browser's address bar.
  • Test your internet connection here:
    https://tokbox.com/developer/tools/precall/
  • Make sure that all applications that could access the camera or microphone are turned off. This includes Zoom, Skype, Teams, etc. On Windows, make sure that these programs are not visible in the taskbar and therefore active in the background. Then restart your browser.
  • Update your browser to the latest version.
  • In the Firefox browser, the privacy settings must be set to 'Default' and all adblockers must be deactivated.
  • Privacy settings in Windows (WIN10) may prevent access to webcam and/or microphone -> Solution

"My counterpart can't hear me."

  • During the session, open the options menu via the gear icon at the top left. Select the correct microphone there.
  • Make sure that you have also selected the correct microphone in your system settings.
  • Check in the 'Pre session check' if doozzoo receives an audio signal from you. In this case you should see a rash in the 'Audio input' section.

"I can't hear my counterpart."

  • Make sure you have selected the correct audio output in your system settings.
  • Your counterpart should also make sure he/she has selected the correct microphone. He/she can check this in the 'Pre session check'. If doozzoo receives an audio signal, you will see a deflection in the 'Audio input' section.

"I hear an echo."

  • Probably you hear your own voice over the speakers of the person you are talking to. In this case, ask him/her to use headphones or activate 'speaker mode'.
  • (Activating speaker mode could negatively affect the sound. Therefore, we recommend using headphones on both sides whenever possible).
  • If your counterpart uses headphones with a built-in microphone, it can happen in rare cases that internal crosstalk happens there. In this case, it is advisable to use a different headphone or a different microphone than the one built into the headphone/headset (for example, the internal microphone of your computer).

"My counterpart hears an echo."

  • Your counterpart is probably hearing their own voice through your speakers. So it's best to use headphones or turn on speaker mode.
  • (Activating speaker mode could negatively affect the sound. Therefore, we recommend using headphones on both sides whenever possible).
  • If you use headphones with a built-in microphone, it can happen in rare cases that internal crosstalk happens there. In this case, it is advisable to use a different headphone, or a different microphone than the one built into the headphone/headset (for example, the internal microphone of your computer).

"Connection is weak or picture and sound freeze."

  • Connect to the Internet using a cable instead of wi-fi, if possible. This will provide a more stable and faster connection. Check the performance of your connection here:
    https://tokbox.com/developer/tools/precall/
  • Stop any applications or apps that are likely to be transmitting or receiving large amounts of data in the background.
  • Go to the 'Pre session check'. Select '640x480px - 4/3' under the preview of your video. In the 'Select audio input' section you can also set the audio bitrate to a lower value.
  • If necessary, turn off your video during the session.

"I or the person I'm talking to hear a hissing noise."

  • If there is a lot of fan noise, the person on whose side the noise is coming from can check 'Noise reduction' in the audio settings. However, this can negatively affect the sound.

"The sound does not seem to be optimal."

  • For the most pristine audio transmission, we recommend using headphones. Then always switch on the headphone mode so that all filters are switched off.
  • Basically, the sound also depends on the equipment used, such as the microphone. For example, the use of an external USB microphone can provide a significant improvement in the sound.
  • Under Windows (WIN10), some sound settings can negatively influence the sound. Here you can find more information and solutions.