[ddouglass]

Your problem is not Hoster, but with your singer's discs. Hoster has the best error correction processes around, so if it gets a disc that is scratched or dirty then it will read the disc and then try to correct any errors it got that cause the screen glitches or any audio errors that cause distortion or noise. This can take up to several minutes for it to finish and is processor intensive.
The biggest problem is most people don't know how to take care of CDs, and that includes some KJs I know. I have seen them pull out a CD and use their shirt front to wipe them off thinking this will help when all it does is scratch them and make things worse.
Like Lonman, I have in my rack tied as a secondary input to my mixer a CDG player for those who insist on using their own discs. This way if it is a Sound Choice mediacloq disc there is no problem with playing it. If it has bad audio or graphics they have no one to blame but themselves.
I'm not saying that MTU doesn't need to look at the focus to keep it from stopping playlist continuation, but it really isn't Hoster that is causing the problem.