I've noticed recently when doing a direct render of BIAB songs to a Wav file, sometimes the bass part drops out (disappears) somewhere within the file----usually, after the songs starts about halfway through the tune. It's only the bass track. This happens with midi bass, as well as RT bass parts. Wonder what's going on here? I've not noticed any problems in the past. This is with version 2011.5. 2012 is on order.