What is the state of aptX in Ubuntu 20?

The original creator was no longer able to maintain the PPA he had for supporting this. Someone else took over managing a PPA using the original creator's sources.

https://launchpad.net/~berglh/+archive/ubuntu/pulseaudio-a2dp

If you run into any issues, here is the github issue that tracked this work - https://github.com/EHfive/pulseaudio-modules-bt/issues/85#issuecomment-618870211.

Hope this helps!


The Good News

The latest PulseAudio includes support for aptX. This is version 15.0 released on 2021-07-27.

Support for LDAC and AptX bluetooth codecs, plus "SBC XQ" (SBC with higher-quality parameters)

PulseAudio now supports the LDAC and AptX codecs for A2DP. In order to use them (...)

The Bad News

Ubuntu 20.04 is running version 13.99.1.

$ pulseaudio --version
pulseaudio 13.99.1