Eddie, you're right we need to know what John is trying to do firstly. Would John need to have the thru box as well as the USB cable?

Couldn't you just have the USB-MIDI cable connected, then choose the Korg as either the input driver or the output driver in the MIDI/AUDIO drivers setup options in BIAB?

When I have my keyboard set up with the computer and just the cable, I can use it as a master controller and send or receive MIDI data.

In my old ATARI days with no MIDI interface, I bought a MOTU MIDI Express for a MIDI patch bay, used the D50 as the controller and sent data to the other synths via the midi express.
Worked well.

With the laptop and the soft synths now, I use my Roland keyboard to input MIDI and have the soft synths as the playback.

yjoh

[i]Music...a joy for life.