This could be your source, TV, soundbar, an HDMI splitter, or HDMI switch. But if it persists, do further diagnosis.Īny device in the digital chain can delay the audio. If the issue goes away, don’t do anything else as the fix may be inaccessible to you. Find the source of the delayĪs mentioned earlier, the source of delay may be a stream/broadcast/local media so tune to a different channel or change the media to one with an alternative sound codec/format. How to fix sound delay on a TV and soundbar 1. Unfortunately, there is no sync feature on TVs to delay the video if you are using it as your source ( for a broadcast, stream, pen drive media…). If you pause with the bar at 0 when the beep goes, your audio and video are in sync. Reduce the delay if it’s lagging too behind (too late) and increase it if is coming too early. With the results, adjust the audio delay value accordingly. Expect an input delay and anticipate the beep to press pause super quick. You should pause the video as soon as you hear the beep, to estimate how much video or audio you have. Additionally, your streaming service (Netflix…) may have an audio sync tool you can use.īelow is a screenshot of a YouTube sync test I used Lip-sync test video screenshot Stream the video or download it to a pen drive or any other storage device. You can manually adjust the values as you watch or use a “ beep and flash” sync test video such as this one to make it easier. Right adjustments ( towards 300 milliseconds), increase the amount of audio delay while left adjustments ( towards 0), reduce it. For instance, some Samsung soundbars allow for audio sync adjustments of 0 to 300ms. Some TVs and/or soundbars have an audio sync feature that lets you adjust the level of audio delay. When used between the source (eg Blu-ray player, or gaming console) and the TV, HDMI switches and splitters may increase video delay as they decode and re-encode the signals. Depending on the implementation of the connections, their transceivers (transmitter & receiver) may increase the delay.Ĭonverters or interconnects such as HDMI Switches and splitters between the TV and soundbar can cause delay. However, additional devices in the chain may delay the audio further where we can detect it or to extremes that irk us.įor example, for a wireless surround soundbar configuration, delays may be introduced in the transmission process.Īlso, different TV and soundbar brands use different connections that include and are not limited to HDMI and Optical (SPDIF). This delays audio processing at the source to compensate for estimated frame rendering delay depending on the format and amount of compression.Īudio delay is also added into a broadcast, stream ( Netflix, Hulu, Disney+…), Blu-rays, DVDs, and so on. Tv and soundbar manufacturers add an auto lip-sync feature to combat this. In this case, the audio is earlier than the video by more than 90 milliseconds or delayed by more than 185 milliseconds. What’s more, the threshold of acceptability is +90ms to -185ms beyond which we find the error intolerable. This is known as the threshold of detectability. The audio should not lead the video by more than 45 milliseconds or be late by more than 125 milliseconds. Our brains are highly sensitive to video lagging audio ( video delay) as sound cannot travel faster than light.Īs a rule of thumb, we detect AV timing differences of +45ms to -125ms. By the time the soundbar outputs the sound, the video is not rendered a discrepancy where the audio comes earlier. This also applies to any soundbar/TV setup we have at home.īut with the increased use of digital processing and storage for audio and video, lip sync errors became more common as video processing takes longer. Thus, we have adapted to expect that sound output always follows the video output and have developed a greater tolerance for audio delay. This comes down to the fact that light travels faster than sound. 3 Do HDMI cables cause the audio delay?Īudio delay is common and natural. 2 How to fix sound delay on a TV and soundbar.
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