I am still running BiaB 2013 on Windows XP and almost exclusively use RealTracks in all of my songs. But I do occasionally key in a particular bass, piano or string phrase onto an unused track, e.g., melody or soloist, and then use a MIDI voice to play that phrase. I am in the process of getting off of Roland's VCS DXi so that I can move to Win 7 or 10. As I go through each song that has some MIDI in it, I try first to use one of the HI-Q MIDI Synth patches from the free SampleTank that is included in BiaB, So far I've been pretty successful and I like the sounds of most of the ones I've used. However, today, I was surprised when SampleTank's acoustic piano would not play a 6-note chord that I had in the song. So, I did some experimenting and found that the maximum number of notes the SampleTank piano voice would play was 4. Has anybody else experienced this?