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+
+APTX
+
+## linux
+- https://medium.com/@multi.flexi/use-aptx-on-linux-3f3c4d597dcd
+- https://blog.shanock.com/compiling-pulseaudio-aptx-support-on-debian-10/
+- https://github.com/lagerimsi-ds/debian-buster_bluetooth_aptX-LDAC/
+- https://packages.debian.org/bullseye/libopenaptx-dev
+- https://github.com/EHfive/pulseaudio-modules-bt
+- https://github.com/EHfive/pulseaudio-modules-bt/wiki/Packages#ubuntu-1804-1810-1904
+### ubuntu
+- https://askubuntu.com/questions/1071469/how-to-enable-aptx-for-bluetooth-devices
+
+## apple
+- https://www.cnet.com/tech/mobile/what-is-apple-w1-bluetooth-chip-headphones-explained/
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