As both of these are basically just one line of code I’d guess that when written it wasn’t considered worth the space.
I suppose that strictly speaking they should carry a GPL comment. Even if we replace these effects I’d expect that we’d keep an archive copy on the wiki, so if you’re able to get hold of Ben then that would be best. I don’t know where these effects came from initially, but as they are bundled with Audacity I would have thought that there must have been at least an implied agreement that they were GPL.
Yes.
I don’t see any problem with that.
We’ve drifted some way off the original topic so I’ve started a new topic about Click Track here: Inaccuracy in Click Track