What you really need, devonplayer, is a good aftermarket Sound Device or Soundcard, with Line Inputs for the Audio Out of the Tyros2. A small mixer may also come in handy here, placed between the Tyros Audio Outputs and the Line Input, that way you can hook up a mic to one of the mixer inputs, The Tyros to another, etc.

You would also need a better speaker monitoring system than what comes with the PCs in general. There are lots of "nearfield monitors" both powered and unpowered if you have an audio power amp suitable, that should be used.

The MIDI out of the PC from BiaB attaches to the MIDI In of the Tyros and BiaB is directed to send all MIDI data that direction from inside the MIDI/Audio output window found under the BB Options menu.

The Realtracks/Realdrums will be sent to that aftermarket sound device internally in the PC, while the sounds that the Tyros2's MIDI synth generate will be mixed in via the Line Input of the sound device at the same time.

This way, you can enjoy the rather spectacular sounds of the Tyros' MIDI synth mixed with the Realtracks/Realdrums and all coming out of one speaker system.

I'm rather surprised to read that your Tyros2 does not have a stereo Audio Input on it. You may want to recheck that in the manual, for if it does, you can simply connect the LINE output or Earphone output of your PC to the Audio Input of the keybpoard and should be able to hear both MIDI from the keyboard and Realtracks from BB through the keyboard's speaker system.

--Mac