I have a 56K Modem and it doesnt jump for me. I used a Wav file compressor to make the files much smaller (The main page one is 177 KB and the rest are about 500 KB) whereas their origional sizes were around the 30,000 KB mark, so they should work pretty well. most of them are small files and shouldnt jump, except for the sonic adventure one, the pihranna plants lullaby, and possibly the bubble bobble remix (but those are all on pages that arent visited too much such as the contact page).