Introducing aptX Adaptive: Latency, Bitrate, Phones, Earbuds, etc

aptX Adaptive is a wireless audio technology that provides high resolution, low latency and glitch-free audio for gaming, video and music. It adjusts the bit rate and latency based on the environment and device, and works seamlessly across all applications. It offers CD and Hi-Res quality music, 16/24 bit-depths, and aptX Low Latency technology.

It was developed by Qualcomm, a leading chip-making company. You may already know Qualcomm as the company that makes micro-chips for smartphones. Qualcomm acquired aptX, the original codec, from CSR in 2015. aptX Adaptive was released in 2018 as a successor to aptX, aptX HD, and aptX Low Latency. It combines the features of these codecs and dynamically adjusts the bit rate and latency based on the environment and device. It is designed to provide high resolution, low latency and glitch-free audio for gaming, video and music.

atX Adaptive Latency

aptX Adaptive Latency is a special feature of the aptX Adaptive codec, which is a Bluetooth audio technology that provides high resolution, low latency and glitch-free audio for gaming, video and music. It adjusts the bit rate and latency based on the environment and device, and works seamlessly across all applications.

aptX Adaptive Latency is special because it can reduce the delay between the audio source and the audio output to less than 90 milliseconds, which means you can hear and react to what’s happening on the screen in near-real time. This is important for gaming and video applications, where synchronization and responsiveness are crucial. Other Bluetooth codecs can have much higher latency, which can cause audio/lip-synchronization issues and lag.

aptX Adaptive Latency is also special because it is dynamic and adaptive, meaning that it can adjust the bit rate and latency automatically without user intervention. It can optimize the audio quality and stability depending on the content, the device, and the environment. For example, it can switch to a low latency mode when you are playing a game or watching a video, and switch back to a high quality mode when you are listening to music. This makes aptX Adaptive Latency a versatile and robust solution for wireless audio.

aptX Adaptive Bitrate

aptX Adaptive Bitrate is a feature of the aptX Adaptive codec, which is a Bluetooth audio technology that provides high resolution, low latency and glitch-free audio for gaming, video and music. It adjusts the bit rate and latency based on the environment and device, and works seamlessly across all applications.

What makes aptX Adaptive Bitrate stand out is that it can dynamically scale the bit rate between 279kbps and 420kbps, which is lower than the previous aptX codecs but more efficient and stable. This means that it can deliver the same sound quality with less data, saving bandwidth and battery power. It can also optimize the audio quality and stability depending on the content, the device, and the environment, without user intervention. For example, it can switch to a low latency mode when you are playing a game or watching a video, and switch back to a high quality mode when you are listening to music.

aptX Adaptive Bitrate is different from other Bluetooth codecs that have fixed or preset bit rates, such as aptX Classic, aptX HD, and LDAC. These codecs can have higher bit rates, but they can also be unstable and prone to dropouts and artifacts when the signal fluctuates. They also require more bandwidth and battery power, which can affect the performance and efficiency of the connection. They also do not adapt to the changing conditions and applications, which can result in audio/lip-synchronization issues and lag.

To recap it all, aptX Adaptive Bitrate is a special feature that makes aptX Adaptive a versatile and robust solution for wireless audio. It offers CD and Hi-Res quality music, low latency mode, adaptive bit rate, and bit-error resilience. It is compatible with aptX and aptX HD devices, and supports 16 and 24 bit-depths at 44.1 and 48kHz sample rates. It is designed to provide a superior wireless listening experience, and sets out to solve a number of the biggest issues in Bluetooth audio.

aptX Adaptive

aptX Adaptive vs LDAC

aptX Adaptive and LDAC are both Bluetooth codecs that can deliver high-resolution audio wirelessly. However, they have some differences in terms of sound quality, bit rate, latency, and stability.

Sound quality is affected by the resolution and frequency of the audio signal. Resolution refers to the number of bits used to represent each sample of sound, while frequency refers to the number of samples taken per second. Higher resolution and frequency mean more detail and accuracy in the sound reproduction. LDAC supports up to 24-bit/96kHz audio, which is considered hi-res quality, while aptX Adaptive supports up to 24-bit/48kHz audio, which is CD quality.

Bit rate is the amount of data that is transmitted per second. Higher bit rate means more information and less compression, which can improve the sound quality. However, higher bit rate also requires more bandwidth and battery power, which can affect the stability and efficiency of the connection. LDAC can transmit up to 990kbps, which is the highest bit rate among Bluetooth codecs, while aptX Adaptive can transmit up to 420kbps, which is lower than LDAC but higher than other aptX codecs.

Latency is the delay between the audio source and the audio output. Lower latency means better synchronization and less lag, which is important for gaming and video applications. aptX Adaptive has a variable latency that can go as low as 50ms, which is considered low latency, while LDAC has a fixed latency of about 150ms, which is higher than aptX Adaptive.

Stability is the ability to maintain a consistent and reliable connection without interruptions or glitches. Stability is influenced by the environment and the device, as well as the bit rate and latency of the codec. aptX Adaptive is designed to adapt to the changing conditions and optimize the bit rate and latency accordingly, while LDAC has three fixed modes of operation that can be manually selected by the user. aptX Adaptive offers more stable and seamless performance, while LDAC can be more prone to dropouts and artifacts when the signal fluctuates.

aptX Adaptive and LDAC are both advanced Bluetooth codecs that can provide high-quality audio, but they have different strengths and weaknesses. LDAC produces the best audio quality at its highest bit rate, but it can be unstable when the signal fluctuates. aptX Adaptive offers more reliable audio quality and lower latency, making it a better choice for most users. However, the availability and compatibility of these codecs depend on the devices and the operating system, so you should check the specifications of your phone and headphones before choosing a codec.

aptX phones

Some of the smartphones that support aptX Adaptive are:

  • Google Pixel 4a, 4a 5G, 5
  • OnePlus 8T, 9, 9 Pro
  • Motorola Edge+ 2023, Moto G50, Moto G Power 5G
  • Xiaomi 14 Pro · Xiaomi 14 · Xiaomi Redmi K60 Pro · Xiaomi 13 Pro · Xiaomi 13 · Xiaomi 12 Lite · Xiaomi 12S · Xiaomi 12S Pro
  • Sony Xperia 1 II, Xperia 5 II

You can find more information about aptX Adaptive phones here.

aptX Adaptive earbuds

aptX Adaptive earbuds are wireless earbuds that use the aptX Adaptive codec, which is a Bluetooth audio technology that provides high resolution, low latency and glitch-free audio for gaming, video and music. It adjusts the bit rate and latency based on the environment and device, and works seamlessly across all applications.

Some of the benefits of aptX Adaptive earbuds are:

  • They deliver CD and Hi-Res quality music, with 16/24 bit-depths.
  • They have a low latency mode that keeps audio in sync with media, reducing audio/lip-synchronization issues.
  • They adapt to the changing conditions and optimize the bit rate and latency accordingly, offering more stable and seamless performance.
  • They are compatible with aptX and aptX HD devices, which are widely available in the market.

Some of the aptX Adaptive earbuds that you can buy are:

  • Edifier TWS1 Pro: These earbuds have a sleek design and a long battery life of up to 42 hours with the charging case. They also support wireless charging and have an IP65 water and dust resistance rating.
  • Bowers & Wilkins PX7: These earbuds are premium and stylish, with a noise-canceling feature and a smart sensor that pauses and resumes playback when you take them off or put them on. They have a battery life of up to 28 hours with the charging case and support fast charging.
  • EarFun Free 2: These earbuds are affordable and feature-rich, with Qualcomm CVC noise reduction technology and an IPX7 waterproof rating. They have deep bass and a battery life of up to 30 hours with the charging case. They also support wireless charging and fast charging.

You can find more devices with aptX Adaptive here.

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