aptX Wireless Bluetooth Audio Products & Technology
https://www.aptx.com/
Qualcomm® aptX™ audio technology powers hi-res wireless audio behind many of the world's finest Bluetooth® smartphones, speakers, transmitters and headphones.
aptX - Wikipedia
https://en.wikipedia.org/wiki/AptX
aptX (until 2010 apt-X, "apt" stand for Audio Processing Technology) is a family of proprietary audio codec compression algorithms owned by Qualcomm...