I/O Buffer & how it affects our mixing?

Question

Another producer told me that it's better to mix your music/project in a buffer size of 512, I use 128 and feel that the smaller the buffer setting the better. I never for one moment thought the buffer setting would affect the quality of my processing and inturn affect my overall quality?!
What do you guys say? Is it better to mix with your buffer setting on 512? Does it really matter? To me it sound like nonsense?

Answer 1

some times its good idea to give large buffer size when mixing
1: the effects are more relax and smooth, but if you have bigger processor and more rams then there is not much to worry about
if you are running G4 laptops to G5 1.8 then its good idea sometimes to go 256 and over when mixing so you don't put too much stress on the system
plug-ins like delays Reverbs and echoes and sorts needs more CPU and RAMS to processors especially on long tail or long reverbs and also large halls
Tap Dealys also require some CPU to do the job right as well
if you not using the CPU to record why don't you give it to the plugins that needs it
stash