Tech

Reduce delay or lag in Bluetooth headsets: tips and solutions

Latency is the issue

You buy some new headphones and try them on your phone. They are great for listening to Spotify or the occasional podcast. But one day, you discover that the series you are watching on Netflix is ​​out of sync with the sound. This problem happens less and less, because technology is advancing. However, it is possible that it has ever happened to you and you want to know if there is any way to solve this problem which is quite annoying when watching movies, series or YouTube videos.

That gap that you perceive between the lips of the interlocutor and what you hear is the famous latency. This time interval always exists, even when we use cables. Latency is measured in milliseconds, and it is completely unnoticeable when moving at low values. However, when the latency is high, the listening experience can be completely ruined.

codecs

Each headset supports a number of codecs. The same goes for every device you are going to use as an audio source. There are better and worse codecs, but the most important thing to know is that headset and playback device must support the same codec. Especially when we talk about high-end equipment. Knowing the codecs is essential to be able to get the most out of each product and avoid the dreaded latency.

SBC

This standard was created in 1993, and is the minimum codec that any Bluetooth audio device must support. It uses the A2DP audio profile. The bad thing about this codec is that its compression is quite improvable. It reaches a maximum rate of 328kbpsand its retardation is its Achilles heel.

CCA

airpods max.

It was a development of several companies, among which AT&T, Nokia and Sony stood out, to name a few. Its audio quality is superior to SBC, but its latency is even worse. It became quite popular thanks to Apple and YouTube. Despite being an old standard, it has been improving over the years, especially in the wireless transmission section.

In this codec we can include the LD-AAC and its variants, which is the one that Apple uses in its AirPods. Currently, many of its original problems have been solved thanks to its evolutions, and it can be said that it is a codec capable of facing the most advanced in the sector.

Sony LDAC

SonyWH-1000XM5

This is one of the most advanced codecs that we currently have. It is the explanation of why the wireless headphones of this brand have the fame they have. It has three variants:

  • LDAC 330kbps
  • LDAC 660kbps
  • LDAC 990 kbps

Qualcomm aptX

qualcomm aptx.jpg

This codec began to be developed in the 80s. In 2015, Qualcomm took over it to develop it. They got three variants:

  • low latency: with aptX LL variant. It supports a rate around 30 ms.
  • High Definition: With the aptX HD variant. This codec is designed for listening to music. Latency is sacrificed to increase the maximum bitrate, being a standard that exceeds the sound quality of a CD, being able to move up to 576 kbps at 24 bit and 192 kHz.
  • adaptive codec: allows you to switch between aptX LL and aptX HD depending on what we are playing, even reaching intermediate values.

LDHC (Hi-Res Wireless Audio)

lhdc codec xiaomi.jpg

This codec has been developed by the HWA, and has two variants. The association is supported by important companies in the sector such as Sennheiser, AudioTechnica, Pioneer or Huawei. The codec is capable of giving a maximum of 900 kbps at 24 bit and 96 KHz with a relatively low latency.

LC3

bluetooth ble audio lc3.jpg

It allows a bitrate between 160 kbps and 345 kbps between 8 and 48 kHz with very low latency. It is a development of Bluetooth Special Interest Group (NEXT). It is encompassed within Bluetooth LE Audio technology.

How to fix latency issues on your Bluetooth headset

Some solutions that work for minimize the latency of your headphones are the following:

Update codecs on both devices

Creative Sound Blaster G3

Now that you know the most important codecs out there, tap identify the ones that are compatible with your phone Y your headphones.

If you have an old mobile and new headphones, the latency problem may be there. Update the operating system and firmware of your headphones. The objective of this process is to avoid using the most generic codec, which, being the oldest, is obviously the one that works the worst.

Re-pair the device

Sometimes, the problem is not so much the codec as a specific problem. You should pair the device again if you think there are connection issues or if you only notice latency in one of the two headphones.

Avoid interference

BeoPlay E8 Sport

As we know, the connection via Bluetooth is very delicate. First of all, the maximum distance at which it usually works is 10 meters. Any obstacles there may cause a malfunction.

If we have some devices connected and that also use Bluetooth, they could interfere with the quality. This could cause interference and increase latency when listening to sound.

Not all phones and headsets are compatible

True Wireless Earbuds

We return to the topic of codecs. Any manufacturer of headphones that wants to use one of those wonderful codecs that we have talked about in the previous section, has to go through the box —if their owners sell licenses, of course—. The cheapest headsets only support the oldest codecs. Minimizing latency is going to be impossible. Now you understand why you can buy wireless headphones for the gym for ten euros, right?

But we can also have playback device problem. You can have very good headphones and a mobile whose manufacturer has not paid the licenses to use that codec. Result? The headset will work using a different codec. For this reason, AirPods are heard better on iPhones and Sony headphones are heard perfectly on any mobile that supports LDAC.

Before buying a Bluetooth headset, look for the spec sheet for your phone and analyze well what codecs it supports. Then, get yourself a pair of headphones that are compatible. Otherwise, your device will work with a codec that is not optimal. Cast you will notice it both in quality and latency.

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