cd backups humms a lot

[sLANE147]

Are there still discs sold for 1-16 speed drives From a marketing point of view I don't think there will be any but I'll try and see if they are still avail.

Another thing I've noticed is with cd backups intro's/in-game movies tend to stutter a lot. This occurs about every 2/3 sec during the sequence. I believe this is not an issue during gameplay cuz the ps2 has all the data already loaded.
Funny thing is that this problem does not occur with DVD backups.

What could it be?!?!?!!??!?