Back when Bluetooth audio was still new, there was a significant difference in sound quality between a pair of wireless headphones and wired headphones. Those differences have since reduced, as have the prices of good wireless audio products. Today, it's possible to buy a decent pair of Bluetooth headphones for less than $85, and get good audio performance straight out of the box.
However, there's a small, quick, simple, and free trick that can help you get a little bit more out of your wireless headphones and earphones when using it with an Android smartphone — tweak the Bluetooth codec. Follow the steps below to find out how you can improve Bluetooth audio on your Android smartphone for free.
What is a Bluetooth codec?
Before we get into the steps, let's explain the concept of Bluetooth codecs in brief. Bluetooth relies on a specific program or ‘code' which compresses data from the source device to quickly and seamlessly transmit wirelessly, and then decompresses the data on the headset or speaker. Different codecs function differently, with some of the newer and more advanced codecs able to transfer more data packets efficiently.
The most commonly used Bluetooth codec is SBC (Sub Band Codec), which is considered the universal standard and is present on practically every Bluetooth device around today. However, there are newer and more advanced codecs, including AAC (Advanced Audio Coding), Qualcomm aptX, and Sony LDAC.
How does it work?
Many Android smartphones allow you to tweak the codec in use, with the feature supported on from Android Oreo onwards. The operating system usually chooses the SBC codec by default, but in some cases, you may be able to change to a better codec if available. When using a Qualcomm chipset-powered smartphone with a pair of headphones that support the aptX or aptX HD codecs, for example, the smartphone will automatically select the better codec.
At other times, switching the codec is a manual process. Remember, the headphones or speaker will also need to support the codec in order for this to work. Fortunately it's an easy process that works on Android 8.0 Oreo and later versions.
What codec should I choose?
This depends on which codecs are supported by your Bluetooth headphones, and this is something you should look into before you buy a new pair of wireless headphones. Support for high-quality codecs such as Qualcomm aptX and Sony LDAC is ideal, but is usually limited to high-end headphones and earphones.
Many affordable headphones support the AAC codec apart from SBC. In these cases, manually switching to AAC could improve audio quality on your headphones, since AAC is a more advanced codec than SBC. For high-end headphones, switching to Qualcomm aptX or Sony LDAC will considerably improve sound quality. While aptX will automatically activate on many Android smartphones, LDAC will have to be manually activated in most cases.
How to change the Bluetooth codec on your Android smartphone
Here's how to change the Bluetooth codec being used by your Android smartphone and improve the resultant audio quality:
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Imam Ja’far ibn Muhammad as-Sadiq (PBUH) has said that: “Reciting the Qur’an from the pages of the Qur’an (meaning to look at it and recite it - not from memory) lightens the punishment of one’s mother and father, even if they are both disbelievers.” Usulul Kafi, Volume 2, Page 613
Imam Ja’far ibn Muhammad as-Sadiq (PBUH) has said that: “Reciting the Qur’an from the pages of the Qur’an (meaning to look at it and recite it - not from memory) lightens the punishment of one’s mother and father, even if they are both disbelievers.”
Usulul Kafi, Volume 2, Page 613