Hello members

I have one problem in my homestudio
My homestudio is...
Mac G5 2.0dual with 2.5Gb Ram plus External Hd Lacie 500Gb Firewire 800 ok
plus Logic 7 and the Target is the Digi 002 Digidesign ok
Here this the problem in the coreaudio driver
i work with audioinstrument for example with spectrasonics (stylus,atmosphere and trilogy) also with Culture of yellow tools ok
with all the programs is fantastic logic and apple computer, but my problem is when audio track with coreaudio buffer 512, 256,128,64
with 512 ok audioinstruments but audiotrack in headphones return is imposible record in change 128 and 64 ok headphones return but
my record have noise and clicks.

thank you
Xavier España