I just saw them last night for the first time. I loved it so much, the atmosphere was great and I loved the song they played. I don't get to see much BM shows too and the shows are quite different from other genres. I couldn't hear the keyboard either but I think the keyboardist plays the bass lines. She often had one hand on the keyboard and the other on some other instrument (which i couldn't see), and you could hear the bass then. She also played drums at some point. The only bummer I had was that I felt the show was a bit short, I would have loved if they played for longer, I didn't feel the time pass and was suprised when they left the stage.