NOTE: This is a topic for advanced users
An open-source volunteer has implemented import of some ProTools-format files into Mixbus sessions.
The main purpose of the PTX session import is to recover sessions for customers that have old PT sessions, but no longer have the ProTools program to open them.
Mixbus can only import the audio and midi regions on each ProTools track. Currently no level controls, panning, bussing or plugins are included in the import. We do not have plans to implement those features.
ProTools changes their encryption and file-format slightly with each major release, so it is likely that some formats will never be supported.
The PTF import feature is under continuous development, so the specifications change over time. You can learn about the up-to-date capabilities of .PTX import here: https://github.com/zamaudio/ptformat#what-works