Why are my videos and voices so choppy?

[Jihad]

Why are my videos and voices so choppy or non-existant. When I run my backups, I use a gamehunter (no mod-chip) and not only do some games not work, but the video on all of them is choppy and the sound doesn't work right. I used CD-Rwin to copy all of them (on 1X) with my Plextor 8/4/32A Strangely, the games work MUCH better on my friends PSX with the same mod-clip, but the video is still choppy (and loading times are longer than usual). I think it may be the system I use. One is a 5XXX series but the CD appeared to wobble because I am missing two of the ball bearings that hold the CD in. I #####d it in for a 1XXX series which plays them better, but still not great. Any tips please? I am new to this board. Thanks in advance!