Removing vocals from regular audio tracks

[Ariespoker]

According the Malata website:

The MDVD-6618 plays Midi DVD/DVD/VCD/CD/DVD±R/DVD±RW/CD-R/CD-RW/Kodak Picture CD

The MDVD-6819 plays Midi DVD, DVD, CD, CD-R, CD-RW, DVD

The MDVD-6838 plays Midi DVD/DVD/VCD/CD/WMA/DVD±R/DVD±RW/CD-R/CD-RW/Kodak Picture CD

According to this site the MDVD6619 is a MIDI / EVD / DVD / DivX / CDG Karaoke Player

This site says the MDVD6838 can play DVD, CD+G, MIDI, MP4 & DivX

hopefully my model is one of the above. thanks for the list!