This incident happened to me last week, I was playing my S900 for a wedding , my jazz trio was playing for the reception and the couple getting married wanted me to play gentle music throught the ceremony...I set the S900 on 'Live Strings' and played orchestral style...just me playing with two hands ...no additional automated parts...after the ceremany a guy came up to me and asked what tape I was playing...it was me playing I said ! he really did not beleive it was me me so I placed both hands down and played exaclty what I played through the wedding...guess what? he SILL would not believe it was me playing...you just cant win !!!