Good evening Joe,
The current team working on FxSound is very small, and the amount of programming required to implement even tiny incremental changes and updates, takes a lot of time and effort.
That being said, the good news is that there are real plans to make FxSound open-source soon, which, if all goes well, should allow for fresh opportunities to modify and improve the program.
For anyone interested in CLI commands, I’ve also copy-pasted some earlier posts on the topic below.