Qualcomm aptX is a product of Qualcomm Technologies International, Ltd.

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Qualcomm® aptX™ audio improves Bluetooth sound quality.

Qualcomm® aptX™ audio technology enhances the wireless sound quality of many of the world’s finest smartphones, speakers, headphones and tablets. Previously, these devices often had a reputation for providing average quality sound via Bluetooth, but with aptX, Bluetooth-enabled products can overcome that barrier and consistently deliver higher quality audio wirelessly. 
aptX is a key product differentiator in over 320 leading audio brands for headphones, headsets, automotive audio, speakers, mobile devices and gaming products—where the ability to have a true audiophile experience is paramount. 

aptX by the numbers.

It’s estimated that more than one billion smartphones, tables, PCs and TVs are aptX-enabled. The aptX audio codec also provides enhanced audio quality in approximately 50 million Bluetooth headsets, speakers and soundbars. It is a strong, recognized brand in the consumer electronics marketplace, supporting all major platforms including Android, Windows 10, Mac OS and Blackberry.

How does aptX work?

In order to fit within the Bluetooth ‘pipe’ and transmit wirelessly, audio needs to use bit-rate reduction (BRR). aptX replicates the entire frequency of the audio, reproducing pure sound and ensuring that users hear everything as the artist intended. 

Improve the wireless listening experience.

aptX is available as part of our complete, fully-featured Bluetooth audio system-on-chip (SoC) platforms,  which ensure ease of integration and save unnecessary development time. 
The aptX product suite includes:


The ‘original’ aptX audio technology enables CD quality audio over Bluetooth. 
Key features include:

  • Compression ratio: 4:1
  • Audio format: 16-bit, 44.1kHz
  • Data rates: 352 kbps

aptX Low Latency

aptX Low Latency technology is designed to enable consumers to watch video while listening to wireless audio in a synchronized fashion. A delay of less that 40ms can be achieved because aptX is a sample-based codec, and low latency can be achieved through efficient population of packets while maintaining transmission robustness.  
Key features include:

  • Compression ratio 4:1
  • Audio format: 16-bit 44.1kHz
  • Data Rates: 352kbps

aptX HD

aptX HD is an enhanced codec that supports 24-bit music quality over Bluetooth. aptX HD is a further development of the existing classic 16-bit aptX codec—operating on the same principle and retaining all the key properties of aptX that have made the codec so widely adopted. As well as accepting a 24-bit audio input, 24-bit audio resolution is maintained by using an extra two bits in each of the four sub-bands of processing. This results in lower signal-to-noise ratio through the encode/decode cycle and less distortion, making aptX HD ideal for use as part of a high-resolution audio solution.
Key features include:

  • Compression ratio 4:1
  • Audio format: 24-bit 48 kHz
  • Data rates: 576kbps 

Learn more about improved wireless sound transmission

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