ok recorded in acid in 24 bit so when do i dither? do i dither after limiting and then render the project or how does it work i'm lost lol. and what plugin do you use to dither with? thanks
Personally I try to keep it in the highest bit range possible until the very end. I burn audio discs with CD Architect using 24-bit files and dithering to 16 there.
This should give you a good idea of what the best ones are. But, if you use Sonar, you're more likely to use Powr-3, or UV22HR if you use Cubase, so on and so forth. Izotope Ozone has its own kind found in the loudness maximizer module, called Mbit+, I'm not sure if it's any relation to Megabit Max, but I doubt it.
So there are a few options for you. I don't know what acid uses, but chances are it has its own dither, possibly as a plugin or possibly in the conversion or export options.
dither doesn't only affect high frequencies.. it changes what would have been digital distortion into a more analog sounding hiss. perhaps in an mp3 this hiss would be less noticeable, but the positive effects would still be the same.
when you publish mp3's, make sure you use 192kbps or more as well as 44.1 khz and the highest quality settings.