Mac: Right the first time -- ever since I first started with BIAB some years ago, I've always set it up as MME. ASIO is used for the voice host/VSTi. All has been well up to now. Only since upgrading have I had to use two soundcard channels to get around this glitch. I also experimented with both operations in ASIO, using ASIOAll, etc. etc. but nothing has provided a solution. So far. Since I've reset BIAB 2009.5 to factory default and then reset my patches, etc. I don't know what else to do.

Hmmmmm.

The "wave file error" box pops up EACH TIME I begin another style/song; then closes, then music starts as usual. Resetting all the MIDI box choices doesn't help.

I wonder why using a host between the VSTi pianos and BIAB does provide a solution? I have Forte Ensemble setup to use ASIO just like the standalone VSTi voices.