We have consulted with the Qualcomm team and verified the following information regarding their audio codec technology:
The aptX Adaptive codec is inherently designed to offer low latency and high resolution. As a result, it supersedes earlier codecs, namely the aptX LL and aptX HD. Due to the advancements made in aptX Adaptive, these older codecs are now deemed obsolete.
Specifically, on contemporary chipsets like the QCC5144, these legacy codecs have not been incorporated, given their redundancy.
To clarify, all functionalities once specific to aptX LL and aptX HD are now encompassed within the aptX Adaptive codec. Consequently, they are no longer available as separate selectable options. We recommend the utilization of the aptX Adaptive codec for your needs.
We will be making the necessary adjustments to our website to ensure this information is represented accurately.
