I've seen many videos of Gary Peacock (with K. Jarrett) and of John Patitucci (with C. Corea) where they place a regular microphone floating in between the legs of the bridge (using a foam or something). Does anybody know how is it really placed? What kind of microphone is it? Has anybody tried that? Thanks in advance. I post a pic of "The Keith Jarrett Trio Live at Open Theatre East" (1993), where the mic can be seen. BTW, a great concert I recommend.