Hopefully, this would clear up the confusions.

TKaraoke is a Karaoke player being developed to play Karaoke Files. Please go to http://www.tkaraoke.com/ for the descriptions and information
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TKT = TKaraoke Tools is a program developed to convert VOB files to MKV format among other useful functions. Please go to http://www.tkaraoke.com/Download.aspx#TKT for the descriptions and information.
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Main reasons to convert VOB to MKV:
1. Saving space on your hard drive if you so choose.
2. Switch Audio Tracks to make your Karaoke collection uniform in track selection when playing back Karaoke Songs.

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Please post your questions here if you should need additional information. Members of this forum would be more than happy to help out.

HAPPY KARA