No, it wasn't meant to be found. We decided not to document the editor before the sound system was finished. If we provide a documented feature then it becomes my duty to try to protect your data (allowing old versions to still be loaded as the system is updated) and so on. But as the sound system changes, old files often become invalid, because their data was designed for an older system.
So, if you use the sound editor system, please regard it as an undocumented feature that is not supported by us - and be prepared for the fact that your sound files will probably become invalidated at some point by a patch or test patch which contains sound improvements. And assume that I won't answer any questions on this either - it's an editor for a system that is still work in progress.
Anyway... for those want to try editing and don't mind their work being deleted, I hope you have fun using the editor!