Flags `automate` and `default` don't work with each other

[Andonome]

This was a surprise. Shouldn't this play the default directory, noninteractively?

[timdubbins]

We could remove this confict but the automated is not deisgned to work with the default directory. The automated player will walk depth-first through a directory until it finds a child directory it can play which means running tap -ad would always play the same album.