Tony why not create some of your own backing tracks using the kb...best of both worlds..
Donny ... I have done that for a number of my songs and converted them to mp3, but I have not gone so far as to put them on a 'smart' device to plug into her system, nor have I worked on trying to load them into the karaoke system which would be the best solution for those gigs ... but the tracks that I use on that system are pretty good ...