Nice thread about alternate disk image format.
Just wanted to chime in about the burn speed.
The habit of saying burning slowly = burning better has to do with the fact that the first units of disk burners were advertised with the amount of errors per burning speed (if you could find an issue of Macworld magazine from the end of 90's it would even more striking).
However, technology improved the speed and accuracy of the disk burners. Nowadays, the challenge lies more in the quality of the media than really the quality of the burner. And it is totally possible than burning a CD at 10x will contain less errors (if any) than burning at 2x with a late 90's burner.
Disclaimer: I am all for the retro knowledge preservation and feel like softs like Toast Titanium had a break point where the convenience took away some control/transparency of the process (making unusual usage harder/impossible).
So I would be curious how your 3DO deals with a good quality CD burnt at 10x on a recent superdrive. And then for the sake of science see how it compares with a 2x/4x burn with a retro Mac
