So be it
It now adds completed mp3s to a list and has a built in audio player using the Music class.
I put in a volume control and would have put in a position control if the blummin music class showed how long an audio file was but without knowing the length of the tune i can't put in a position changer.
Have added other things like now it doesn't just check a file has the .wav extension it uses the unix "file" command to check type is audio/* so you can set to view all files and add any audio file that lame supports to convert.
Am also making options for it to hide the main windows if arguments are passed and just show the terminal view.
And an option for it to ask to confirm/change output folder when run with args.