https://community.bistudio.com/wiki/diag_resetShapes

This is great for models!

Yet it is unbelievably painful to have to restart the game every time to test sounds.

Diag_mergeConfig updates the config files, yet the old audio stays in memory. If an audio file data is changed in unpacked data and mission is restarted, the game will NOT update it in memory.

In the best case scenario - diag_resetSounds will flush all audio from memory and reload the files based on config entries from unpacked data (if unpacked data is provided).