you take, i don't know, harmencorps, with instruments from beethoven's time. automatically the sound changes. they're playing with wooden sticks instead of felt. the strings are playing on gut strings-- cat gut-- not steel like we play today. that changes things. all the great performances of this music or any music what, characterizes it is that it is different from anybody else's. same thing if you hear a singer. if you hear rene fleming nobody else will sound like that. if you hear yo-yo ma, nobody plays the cello like that. the great performers for me exhibit absolute individual artistic content in their presentation that is recognizable. >> rose: the book is call thed "conducting business: unveiling the mystery behind the maestro." leonard slatted kin, thank you. >> thank you. >> rose: michael is sailor is here. in a single day in march of 2000 his net worth dropped by $6 billion due to an s.e.c. case brought against his company, microstrategy. but man and company survived and thrived once again. microstrategy helps other companies analyze data and make d