Note that this directory only contains very few samples - the idea is NOT to have a full-fledged sound effect project, but merely to test for such effects quickly, such as for a ruby-gtk3 widget.
Users can then expand this on their own anyway.
These sound files may be exchanged in the future, in particular with smaller files, if possible - so really think of this directory just as an “examples” directory, with samples, nothing more.
The ideal solution would be to have completely computer-generated audio effects. I lack knowledge in how to achieve this, though.