Due to the way an external soundbar processes sound separately from the TV processing the video, there may be a slight delay between the audio and video when using a digital audio connection (S/PDIF or HDMI).
This is normal across a lot of digital sound systems and TVs, and is generally only noticeable if the TV speakers are playing at the same time.
Depending on the particular model(s), you may be able to adjust sync settings in the soundbar and/or TV - this can sometimes be shown as "lip sync" depending on the brand and model of your TV. Many AV receivers for home theatre systems will also have settings for this function.
This feature will allow you to set a buffer so that both the video and audio signals are transmitted at the same time, though it may take some experimentation to find the correct setting, as this will depend entirely on the devices that you are using.
Once this delay has been appropriately compensated, the video and audio should once again be synchronised correctly.
You can also work around this by using an analog audio connection, such as 3.5mm (or AUX), though you may note a slight decline in audio quality as compared to a digital signal.
If you continue to have issues with delayed audio output, please contact our Kogan.com Support Team via your Kogan.com account.