I did the following conversion test with a wav file:
Original (wav) 232 KB
Convert to MP3 41 KB
Convert to OGG 32 KB
Convert to M4A 26 KB
Like you say, if your games got 10-20 sound effects, it's a massive difference.
I also made an example with C2r50 and uploaded it to Dropbox, just a basic 'click on a square' to play sound thing.Click on square
Using my current browser (Chrome..XP), i get about a 1.5 second delay, so i think its time to try another browser.
After Internet Explorer.....which browser would you recomend as the best alternative to Chrome ?