The most easy action music mod to use and make packs for in Garry's mod. Workshop page: https://steamcommunity.com/sharedfiles/filedetails/?id=2911363186
This repository contains source code for the mod itself, action builder made in python and action builder made in c++. Python version is soon to be deprecated once the C++ version is verified to be stable enough.
Both action builder versions can be found in releases and are meant only for windows, however I will at the very least try to support translation layers such as wine.
Guide for both can be seen here: https://youtu.be/-9ji4sEhwfE