Going to Nautilus and DLing nautilus-script-audio-converter was no problem.
Matter of fact I actually found that converter myself and installed it. Then
in Ubuntu I could not find it. I didn't see a GUI icon for it. In terminal
doing a updatedb then locate, with locate I tried several search arguments.
I found where lib and docs, things like that had been install on my computer
but nothing was in a place where I would expect to find an executable.

Where might that be, better yet what name do I call it to execute it in
terminal or a GUI icon?

The more I think I know about Ubuntu the more it proves me WRONG.