“Will I experience lip sync and sound latency when using Bluetooth headphones for sound?”
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Bluetooth headphones and earbuds experience at least 32ms of audio latency. But that's only in ideal circumstances. You're more likely to run into a 100-300ms delay, especially while using true wireless earbuds. Bluetooth devices spend a lot more time in the initial “processing” stage. First, digital audio is processed by the LG 43 inch Class 4K Smart UHD TV with AI ThinQ® (42.5'' Diag), Model # 43UN7300PUF, then it is passed to your Bluetooth headphones over a wireless signal, where it’s converted into analog audio and blasted into your ears. Additionally, a pair of true wireless earbuds may introduce extra lag to ensure that the left and right buds stay in sync. Thankfully, that 100-500ms delay time isn’t a death-blow for watching video, so long as your headphones and TV support the Bluetooth 5.0 audio standard. The Bluetooth version supported on the TV is Bluetooth ver. 5.0 which is the current standard for wireless audio transmission. It processes data faster than previous iterations of Bluetooth—effectively generating higher quality audio with shorter delay times. But Bluetooth 5.0 doesn’t totally mask the latency of wireless audio. Instead, it compensates for lag through a technique called audio-video sync (or A/V sync). A set of Bluetooth 5.0 devices are almost guaranteed to work with A/V sync, while outdated tech isn’t. It’s also worth noting that A/V sync is useless for gaming or music production, as these applications are interactive and happen in real-time. Bluetooth 5.0 and A/V sync will solve the average person’s Bluetooth latency issues. But if you’re an audio nerd or a gamer, then you may want to take steps to dramatically decrease the latency of your Bluetooth devices. In this case, we suggest shopping for headphones based on their supported codecs. Codecs are responsible for how digital audio is encoded and decoded for wireless transfer. The universal Bluetooth codec, called SBC, is probably the codec that you’ve used the most. SBC doesn’t use up a lot of system resources, but its 100-200ms latency and 16-bit audio make it a poor option for people who are obsessed with lag or sound quality. Currently, the most popular alternative to SBC is aptX HD. It’s a 24-bit solution with lag times that average between 40 and 100ms. In other words, it sounds better and works with less latency than SBC. Gamers can take things a step further by honing in on headphones that support the uncommon 16-bit aptX LL codec, which operates with just 32 to 40ms of lag, or the aptX Adaptive codec, which flip-flops between bit rates and delay times depending on your current task. The TV also supports the apt-X audio codec...^IFV
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