Avid HDX latency PTHD vs other DAWs

[kikidi]

Hello,

I'm a new hdx user, maybe you could help me.

Is it possible to have the same low latency for tracking in Logic (or whatever daw) as in PT HD ?

When I record in PT HD, this is perfect I cannot hear the latency. But in Logic, even if I put the lowest buffer, I can hear a little latency, as it was phasey.

I tried to put the lowest buffer inside Logic and also inside the avidaudioserver.app.

Moreover, the buffers change seems to be taken into account only in the avidaudioserver app and not when I change in Logic. Is it normal ?

Also, weird things : Some youtube videos or some wav files (not all) plays under 3/4 output instead of the 1/2 output when I play in firefox or quicktime player.
But when I play in google chrome or in old quicktime 7 player it works fine.

I'm really thinking of formatting and redo a fresh start with my mac :)

Thank in advance for your help !