It seems like adding vorbis-tools to Recommends would be a good idea.
For most people this would make sure that vorbis-tools was installed since recommends are installed by default. For users with this turned off they should be aware of what is happening.
I'll make the change in the next upload. Colin -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org