USB 32X32 BUFFER SIZE

Hello,

I’d like to know how small the buffer of the usb 32x32 connection (to a Macbookpro laptop for ex) can go without package lost.
Something like 32 or 64 samples ? or a lot more ?

I’m interessed in knowing the capacity of the SQ serie to do external audio processing without additional card.

Thx for your job and great mixers