[Roy Dennis]

Hoster does not recognize m4a files, they do not show in any of the folders, the only Audio types recognized by Hoster are wma, mp3 for importing I believe wav can be used in some dialogs like instabuttons.

So unless you can convert them to mp3 or wma first I see no way of importing them, you can check first before importing by trying to load them from the audio tab.

If you just want to bulk load mp3 or wma from a folder just use the add folder option from the build database dialog highlighting either the mp3 or wma button before adding folder. It reads MP3 and WMA id tags headers to fill in the KMH's Song Parameters for each song if the data is found.
Should you decide to do this what I would do before adding the folder is in the box where it shows next book Id, enter a number much higher than your last karaoke import, "Example 30000 " this will then keep the book id for audio well separated from your karaoke book id so allowing you to carry on with consecutive karaoke book ids of 5 digits (3 plus 2 for track)unless you are already up to 999.