I have found Vogone hit and miss. Its not the progs fault. I find it works better on older simpler stuff ie: Neil Young.
PROGS I USE FOR DEVOC ETC
Dart Karaoke Author
http://www.dartech.com/Products/New.asp This prog has a good devocalizer. It has 3 variable fields which allow you to change the sound and test it before you want to process the file. This is also hit and miss depending on the recording of the music. It also comes with good music tools, midi to wave and mp3 to wave. The Karaoke side though saves to its own format which can only be played on PC. I have found this 15 day trial great for editing sounds, but have never used the karaoke side of the prog since there has been no need to.