[jes]

you can do it in specific applications by using the Digidesign Direct I/O ASIO driver. i use it that way in MAX/MSP and SuperCollider, it works then as input and output.
however, when using Quicktime midi also, it doesn't send it out the mBox, which is strange. i don't quite understand that. like if i am playing a max patch, all the audio goes in and out the mBox, but the QT midi sounds are coming out of the powerbook's speakers!
thast doesn't happen with the AMIII card...